2021, 一般社団法人 建築設備技術者協会, カーボンニュートラル賞　　　　　　　　　　　　　　　
長野 克則

2018, 公益社団法人 日本建築衛生管理教育センター, 平成29年度会長表彰（建築物の環境衛生管理事業功労者）　　　　　　　　　　　　　　　
長野 克則

2017, 一般財団法人ヒートポンプ・蓄熱センター, 一般財団法人ヒートポンプ・蓄熱センター理事長賞　　　　　　　　　　　　　　　
北海道大学, 留寿都村

2016, 経済産業省北海道経済産業局, 平成28年度省エネルギー・新エネルギー優良事業者等北海道経済産業局長表彰　　　　　　　　　　　　　　　
長野 克則

2015, China Award for Sience and Technology in Construction, 「華夏建設科学技術賞」二等奨　　　　　　　　　　　　　　　
長野 克則

2015, The 13rd International Conference on Thermal Energy Storage(Beijing), Best Paper Award　　　　　　　　　　　　　　　
長野克則

2012, The 2nd International Energy Storage Conference(Dublin), Best Paper Award　　　　　　　　　　　　　　　
長野克則

2011, (公社)空気調和・衛生工学会, 振興賞技術振興賞　　　　　　　　　　　　　　　
長野克則

2011, (公社)日本地下水学会, 学術賞　　　　　　　　　　　　　　　
長野克則

2010, (公社)空気調和・衛生工学会, 論文賞　　　　　　　　　　　　　　　
長野克則

2010, (公社)空気調和・衛生工学会, 振興賞住宅環境設備賞　　　　　　　　　　　　　　　
長野克則

2010, 産学官連携, 産学官連携功労者表彰（環境大臣賞）　　　　　　　　　　　　　　　
「小水量対応高効率地中熱利用ヒートポンプシステムの開発」
長野克則

2009, (一社)日本太陽エネルギー学会, 論文賞（押田賞）　　　　　　　　　　　　　　　
長野克則

2008, The 9th IEA Heat Pump Conference(Zurich), Best Paper Award　　　　　　　　　　　　　　　
長野克則

2008, (公社)空気調和・衛生工学会, 振興賞住宅環境設備賞　　　　　　　　　　　　　　　
長野克則

2006, (一社)日本太陽エネルギー学会, 論文賞　　　　　　　　　　　　　　　
長野克則

2003, The 9th International on Thermal Energy Storage(Warsaw), Best Paper Award　　　　　　　　　　　　　　　
長野克則

Analyzing the Performance of Double Spiral Tube Ground Heat Exchangers in a Zero-Energy Building Using Measurement Data
Kunning Yang, Takao Katsura, Shigeyuki Nagasaka, Katsunori Nagano
Energies, 16, 19, Oct. 2023
Scientific journal, A ground-source heat pump (GSHP) system is a renewable energy technology that effectively reduces greenhouse gas emissions and consequently mitigates the progression of global warming. The thermal efficiency of ground heat exchangers (GHEs) is a critical component in the GSHP system that must be accurately estimated for its long-term operationality. Therefore, in this study, the thermal performance of double-spiral GHEs incorporated within the thermal piles of a zero-energy building in Sapporo, Japan, was investigated using the actual measured data obtained from the site and a novel metric, namely, the coefficient of heat extraction/injection, for a more precise evaluation. Moreover, this study assessed the coefficient of performance (COP) of the GSHP units during various periods of cooling or heating. The temperature of the circulating fluid remained within an ideal operational range over an operational period of 2 years, and the COP calculations indicated a high operational efficiency. The results derived in this study substantially exceeded those of traditional U-tube GHEs, indicating the enhanced efficiency and superior performance of large-diameter thermal piles with augmented thermal capacity. Our findings suggest that GSHP systems with double-spiral-tube GHEs have superior efficiency than conventional GHEs.

Performance prediction of an adsorption chiller combined with heat recovery and mass recovery by a three-dimensional model
Fang He, Katsunori Nagano, Junya Togawa
Energy, 277, 15 Aug. 2023
Scientific journal, In this study, a three-dimensional model was formulated to predict and analyze the performance of an adsorption chiller (AC) with heat recovery (HR) and mass recovery (MR). A new value factor index (VF) was proposed to determine the parameters for optimal system performance. This model was confirmed to be suitable for performance prediction. The coefficient of performance (COP) can be improved from 0.503 to 0.604 at a cycle period of 14 min, which is consistent with the results of our previous study. Based on the VF, an optimal HR period of 24 min was determined. Subsequently, MR was introduced. In cases where an MR of 1 s was utilized, the specific cooling power (SCP) increased from 0.389 kW/kg to 0.393 kW/kg, while the COP increased to 0.607 with the HR. In addition, as the mass recovery period lengthened, the COP decreased. The accumulated recoverable sensible heat was discovered to be shared by the HR and MR. The HR reduces the accumulated regeneration heat. MR not only reduced the regeneration heat but also enhanced the sorption process.

Development and application of a new calculation method for double spiral ground heat exchangers
Kunning Yang, Takao Katsura, Shigeyuki Nagasaka, Katsunori Nagano
Energy and Buildings, 291, 15 Jul. 2023
Scientific journal, This study provides a new calculation method for double spiral pipe ground heat exchangers (GHEs) and involves the combination of the analytical, infinite line source (ILS), and infinite cylindrical source (ICS) models with the capacity resistance model (CaRM). Method adopts the concept of fin efficiency, enabling it to calculate underground temperature changes easily and accurately, followed by integration into a simulation tool for ground source heat pump (GSHP) systems. Verification was done by comparing simulation results with actual operating data, measured from a zero-energy building (ZEB) in Sapporo, Japan. Analyses conducted using the new calculation method prove that simulation results can be obtained with increased precision and validity. Under conditions of instantaneous large heat injection, significant differences were observed between the simulation and the actual measurements during the initial 50 h. The number of temperature nodes in the network was increased to effectively reduce the error between simulations and measurements. Moreover, it was seen that the efficiency of double spiral pipe GHEs can be potentially improved by shortening the spiral pitch. This study thus confirms that the proposed new calculation method can be applied to future designs of GSHP systems by using thermal piles with double spiral pipe GHEs.

Field studies on the energy consumption and thermal comfort of a nZEB using radiant ceiling panel and open-loop groundwater heat pump system in a cold region
Minzhi Ye, Katsunori Nagano, Ahmed A. Serageldin, Hideki Sato
Journal of Building Engineering, 67, 15 May 2023
Scientific journal, Field studies were conducted in an office building in a cold region equipped with a radiant ceiling panel (RCP) and open-loop groundwater heat pump (GWHP) system. First, the indoor thermal comfort in a target office was evaluated based on the results obtained from the physical measurements and survey questionnaire. The results showed that the suspended RCP system could achieve comfortable indoor thermal conditions throughout the year. The indoor temperature was maintained within the range of 22–26 °C, the humidity was within 30–60%, and CO2 concentration was mostly below 1000 ppm. Second, the energy performance was tested simultaneously, and intermittent and continuous operation methods were compared. Under the continuous operation method, a stable indoor environment was maintained, and the COP of the GWHP system increased by 10%. The results showed the potential to further reduce energy consumption and maintain a high level of thermal comfort through the optimization of system operations. Finally, the annual energy consumption was calculated based on the recorded measurements. The results illustrate that this building can reach the ZEB-ready level in Japan. The primary energy consumption can be decreased by approximately 67% compared to the reference by applying the combined system.

Experimental analysis of vacuum pressure and gas flow rate in structured-core transparent vacuum insulation panels
Takao Katsura, Takato Miyata, Saim Memon, Ali Radwan, Katsunori Nagano
ENERGY REPORTS, 9, 1071, 1078, ELSEVIER, Mar. 2023
English, Scientific journal, The notion that modern buildings should strive to be net-zero energy buildings (NZEBs) is widely accepted. One of the causes leading to high energy usage for space heating, resulting in avoidable carbon emissions, is heat loss via building windows. In order to improve window's insulation in existing buildings, structured-core transparent vacuum insulation panels (TVIPs) are proposed. TVIPs mainly consist of the structured core material, the low-emissivity film, and the transparent gas barrier envelope. TVIPs have high insulation performance and are inexpensive to manufacture and can be easily installed. Therefore, TVIPs have the potential to improve window's insulation in existing buildings at a low cost. However, it is necessary to overcome the issue of preventing the pressure rise inside TVIP after vacuum sealing. The authors constructed an experimental setup to quantify the effect of reduction of gas flow rate in TVIP after evacuation by applying the pressure-rate-of-rise-method. In this experiment, a gas barrier film with a straw was used as the vacuum chamber. This could reproduce the pressure increase in the TVIP after sealing and the gas flow rate in the TVIP is evaluated. The experimental result shows that the coated core material and the enclosing getter agent lowered the pressure rise and gas flow rate in TVIP by combining concurrent evacuation and heating. Furthermore, after extending the simultaneous vacuuming and heating period to 8 h and applying the coated core material, and enclosing the getter agent, the internal pressure in TVIP may be lowered to around 1 Pa after 30 min after halting vacuuming. It was confirmed that this pressure satisfied the performance required for TVIPs, and the result was much closer to the realization of TVIPs. (c) 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Numerical and Parametric Study on Open-Type Ceiling Radiant Cooling Panel with Curved and Segmented Structure
Minzhi Ye, Ahmed A. Serageldin, Katsunori Nagano
ENERGIES, 16, 6, MDPI, Mar. 2023
English, Scientific journal, A suspended open-type ceiling radiant cooling panel (CRCP) has been proposed recently. The main challenge is improving its cooling performance to overcome limitations for extensive use. Therefore, this study aims to optimize the design of CRCPs with curved and segmented structure to enhance heat transfer. A three-dimensional CFD model was developed to investigate the cooling capacity and heat transfer coefficient of the CRCPs installed inside a single enclosed room. Panel structure was determined based on four dependent parameters: the panel curvature width (L, m), the panel curvature radius (r, m), the void distance (d, m) between each panel or panel segment, and the panel coverage area (A(c), m(2)). The panel surface area (A(s), m(2)) and the ratio of panel curvature width to radius (L/r) were also examined. A total of 35 designs were compared under 7 different cooling load conditions, and 245 cases were carried out. The results show that the nominal cooling capacity and heat transfer coefficient rise with increasing curvature radius and decreasing curvature width. The void distance plays the most crucial role in influencing cooling performance. It is possible to simultaneously improve cooling performance, achieve uniform temperature distribution, and reduce the number of panels through structure optimization.

Evaluating Long-Term Performance of a Residential Ground-Source Heat Pump System under Climate Change in Cold and Warm Cities of Japan
Yoshitaka Sakata, Yuma Akeyama, Takao Katsura, Katsunori Nagano
Energies, 16, 6, 2742, MDPI, Mar. 2023, [Peer-reviewed]
English, Scientific journal, A residential ground-source heat pump system often requires a long payback time to recover the capital cost. Long-term uncertainty in such a system's performance increases as the climate changes. This study compares 20-years hourly heating/cooling demands of a typical residence in the present (2000-2020) and in the future (2076-2095) for two locations in Japan. This study also calculated soil temperatures as heat sources through 1D heat-transfer simulation based on the A1B climate scenario in the Intergovernmental Panel on Climate Change's Special Report. System performance and simple payback times were compared in one cold and one warm city in Japan (Sapporo and Tokyo, respectively). Soil temperatures at a middle depth of a borehole heat exchanger were predicted to increase in the future by similar to 1 degrees C, with insignificant effects on a borehole heat exchanger. Seasonal performance factors increased in Sapporo because thermal demands would be kept even in the future, but decreased in Tokyo, which has a higher ratio of the energy used in operating the system in cooling mode compared with its small heating demand. The simple payback time was estimated at 16.2 and >20 years in Sapporo and Tokyo, respectively, both in the present and future, with the constant energy prices. If oil and gas prices doubled, the payback time would be halved in Sapporo to 8.4 years but remain around 20 years or more in Tokyo.

Field Study on Indoor Thermal Comfort of a ‘ZEB Ready’ Office Building Using Radiant Ceiling Panel Coupled with Open-Loop Ground Source Heat Pump
Minzhi Ye, Ahmed A. Serageldin, Hideki Sato, Katsunori Nagano
Environmental Science and Engineering, 2353, 2362, 2023
International conference proceedings, A field study was conducted in a ‘ZEB ready’ office building using the radiant ceiling panel and open-loop ground source heat pump system in the cold region. The indoor thermal environment was evaluated based on the objective physical measurement and subjective questionnaire survey. Moreover, the energy consumption was calculated based on the record from the building energy management system. The system performances of intermittent and continuous operation methods were also compared in winter. The results show that the systems can achieve the required thermal comfort during the heating and cooling period, the indoor temperature is within 23–25 °C. More than 70% of staff declared ‘neutral’ in thermal sensation votes, which means most people were satisfied with the indoor thermal condition. Continuous operation leads to 19 kWh electric energy consumption per day more than intermittent operation, whereas the COP of the heat pump increases from 3.86 to 4.18.

Improvement of accuracy with uncertainty quantification in the simulation of a ground heat exchanger by combining model prediction and observation
Yutaka Shoji, Takao Katsura, Katsunori Nagano
GEOTHERMICS, 107, PERGAMON-ELSEVIER SCIENCE LTD, Jan. 2023
English, Scientific journal, With the utilization of shallow geothermal heat as a renewable energy source in recent times, several studies have focused on ground heat exchanger simulation. Ground heat exchanger simulation is an important factor that contributes to the design and control of shallow geothermal systems. Thus far, various models and parameter estimation methods have been proposed to represent actual phenomena; however, errors inevitably occur be-tween the model predictions and actual values. Hence, a method that can explicitly account for this uncertainty is desirable. Thus, in this study, we show that data assimilation-a method that combines simulation and obser-vation for more accurate state estimation and uncertainty quantification-can be applied to ground heat exchanger simulation. To this end, we perform an in situ transient heating experiment using a single-borehole heat exchanger, and we assimilate the actual observations using an ensemble Kalman filter for a reproductive simulation. The results of the data assimilation experiment indicate that the model parameter, i.e., the soil effective thermal conductivity, is modified from 1.19 W m-1 K-1 estimated from the geologic column to 1.70 +/- 0.05 W m-1 K-1, and it reproduces the standard estimate of 1.69 W m-1 K-1 from the thermal response test. Further, for the ground heat exchanger inlet/outlet temperature, simulation without data assimilation yielded a maximum error of approximately 2.0 K, whereas simulation with data assimilation produced a highly accurate state estimate with a standard deviation of 0.08 K. The proposed method allows a posteriori estimation of soil properties from the operational data of ground heat exchanger systems installed without thermal response tests as well as the correction of deviations between the model and observation values through statistical support and uncertainty quantification.

Hybrid ground source heat pump system capable of year-round heating and its application in liquid natural gas vaporization
Takao Katsura, Yutaka Shoji, Kunning Yang, Hitoshi Akai, Jun Shishido, Mitsuhiro Ishikawa, Yuichi Yashima, Koji Tanifuji, Katsunori Nagano
INTERNATIONAL JOURNAL OF ENERGY RESEARCH, 46, 15, 23388, 23406, WILEY-HINDAWI, Dec. 2022
English, Scientific journal, One of the challenges in using a ground source heat pump (GSHP) system is the long-term increase or decrease in underground temperature due to an imbalance between heat extraction and injection. To eliminate this imbalance, we proposed a hybrid GSHP (HGSHP) system combined with air-water heat exchangers (AWHEs) capable of year-round heating and applied it to the hot water supply for liquid natural gas (LNG) vaporization in a satellite station. In this paper, the authors demonstrate the year-round heating capability of the HGSHP system and the energy conservation benefits of installing the HGSHP system for LNG vaporization. First, a field experimental apparatus was constructed for a gas vaporization system with the HGSHP; thereafter, an experimental proof of gas vaporization was obtained. The experimental results showed that it was possible to stably vaporize liquid nitrogen that was used instead of LNG by supplying hot water at 25 degrees C. Additionally, in the gas vaporization experiment with the HGSHP system in the summer season, the SCOP measured was over ten. A calculation model for the AWHE was then established using the field test data; thereafter, a simulation tool for the HGSHP system was developed by combining it with one for the GSHP system. The simulation results indicated that the average surface temperature of all GHEs in the HGSHP system decreases from first year to second year. However, the average surface temperature of all GHEs stabilizes at a reduced level after the third year. These results indicate that the HGSHP system can operate long-term for year-round heating because the average surface temperature stabilize in the long-term.

An inverter-driven heat pump with a multi-tubular tube-in-tube heat exchanger for domestic hot water supply
Hongzhi Liu, Takao Katsura, Katsunori Nagano
JOURNAL OF BUILDING ENGINEERING, 54, ELSEVIER, Aug. 2022
English, Scientific journal, An inverter-driven heat pump prototype to supply domestic hot water (DHW) was built, within which a multi-tubular tube-in-tube counter-flow heat exchanger as condenser was installed including a desuperheater section and a condenser section. The heating coefficient of performance (COP) is reduced approximately 10% if the feed water temperature increases from 9 degrees C to 24 degrees C. When the inlet temperature of primary brine is 24 degrees C, the compressor frequency does not show any effect on the heating COP. While when the inlet temperatures of primary fluid are 5, 10, and 17 degrees C, the COP increases with the rise of the compressor frequency at first, but it stays almost constant when the compressor frequency is within 40-55 Hz. It is considered that the effects of opposite dependencies of heat transfer and the pressure drop in the condenser onto COP tend to cancel each other out to obtain a constant heating COP. When the produced hot water is 65 degrees C, the heating COP of our developed heat pump for DHW is the largest among those of other three different heat pumps.

MICS-ANN model: An artificial neural network model for fast computation of G-function in moving infinite cylindrical source model
Yutaka Shoji, Takao Katsura, Katsunori Nagano
GEOTHERMICS, 100, PERGAMON-ELSEVIER SCIENCE LTD, Mar. 2022
English, Scientific journal, Model of the temperature field around the ground heat exchanger is a critical part of shallow geothermal system simulation. Some models have not yet obtained an analytical solution due to the presence of groundwater flow or the complex geometry of the ground heat exchanger. For such models, numerical analysis is performed and the computational cost is an issue. Here we show a method to reproduce the finite volume method solution of the moving infinite cylindrical source model quickly and accurately using an artificial neural network. Using the obtained artificial neural network model, the hourly 20-year temperature response function of the moving infinite cylindrical source model can be computed in only 5.726 s. The mean squared error of the artificial neural network model for the finite volume method solution was 2.158 x 10(-6) in dimensionless temperature, indicating a sufficiently small error. The fast and accurate calculation of the moving infinite cylindrical source model is expected to contribute to the optimal design of shallow geothermal systems with a groundwater flow field. In addition, this method of reproducing a temperature response function by artificial neural network may be applicable not only to the moving infinite cylindrical source model but also to other models.

地中熱オープンループシステムにおける井戸性能評価に関する研究(その4)札幌三建ビルにおける還元井目詰まり要因に関する実験的考察
阪田 義隆, 長野 克則, 沖原 峻, 佐藤 英樹
技術統括本部技術報告 = EMD research activity reports / 三建設備工業(株)技術統括本部 編, 29, 15, 22, 三建設備工業技術統括本部, 2022
Japanese

凹型天井放射パネルの冷暖房時の放熱性能と室内垂直温度分布に関する実験的研究
長野 克則, 叶 敏之, 佐藤 英樹
技術統括本部技術報告 = EMD research activity reports / 三建設備工業(株)技術統括本部 編, 29, 37, 40, 三建設備工業技術統括本部, 2022
Japanese

Thermal performance improvement of AHP using corrugated heat exchanger by dip-coating method with mass recovery
Fang He, Katsunori Nagano, Sung-Hoon Seol, Junya Togawa
ENERGY, 239, PERGAMON-ELSEVIER SCIENCE LTD, Jan. 2022
English, Scientific journal, This study focuses on the adsorption heat pump cooling performance enhancement. The corrugated heat exchanger (HEX) has been employed in recent years owing to its excellent heat transfer; however, its filling method require improvement. Therefore, a filling method called dip-coating method is introduced to improve its heat transfer and packing density. The dip-coating method is adapted to accommodate the Wakkanai siliceous shale composite adsorbent, and two types of adsorbent filled-HEX (ad-HEX), i.e., the dip-HEX and dip-filled-HEX, are compared with the conventional ad-HEX of the filled-HEX. The dip-HEX comprises a few mass transfer channels and has a packing density similar to that of the filled-HEX. Meanwhile, the dip-filled-HEX exhibits a 30% higher packing density compared with the filled-HEX. A basic performance experiment is performed, and the results indicate that the dip-HEX outperforms the filled-HEX owing to its higher coefficient of performance (COP) and specific cooling power (SCP). The dip-filled-HEX exhibits a slightly lower SCP than the filled-HEX; however, it exhibits the highest COP among three types of ad-HEXs. Subsequently, mass recovery is applied to enhance the cooling performance. In a typical mass recovery period of 10 s, the COP and SCP of the dip-HEX increases to 0.46 and 0.74 W/g, respectively. (C) 2021 Elsevier Ltd. All rights reserved.

Numerical investigation of the thermal performance of a radiant ceiling cooling panel with segmented concave surfaces
Ahmed A. Serageldin, Minzhi Ye, Ali Radwan, Hideki Sato, Katsunori Nagano
JOURNAL OF BUILDING ENGINEERING, 42, ELSEVIER, Oct. 2021
English, Scientific journal, Radiant cooling/heating (RCH) panel systems have recently received increasing attention because of their energy-efficient operation and improved comfort performance. Therefore, this study proposes a novel RCH panel with segmented concave surfaces. The new panel has the same surface area as a conventional flat surface panel. A series of laboratory tests were conducted to investigate the heat transfer characteristics inside a chamber equipped with the new panel. Moreover, a three-dimensional finite volume simulation was developed to investigate the heat transfer, fluid flow, and thermal comfort conditions inside a single room equipped with the proposed panel, and the results were compared with those of a conventional flat surface panel under the same operating conditions and cooling load. First, the curvature cord length ratio to curvature radius (L/R) was optimized in the range of 0 (flat) to 2. In all cases, the surface area was the same, but the coverage area ratio varied. In addition, the impact of different coverage area ratios from 55% to 81% and the influence of adding void spaces of 29 mm and 11 mm between adjacent curved segments were analyzed. The results showed that the simulation achieved good agreement with the experimental results with an accuracy of 98.9%. The coverage area ratio played an essential role in decreasing the indoor air temperature by 2 degrees C and reducing the floor temperature by 1.6 degrees C. When the L/R ratio changed from 0 to 1.5 at a coverage ratio of 81%, the average air temperature decreased by 1 degrees C. Moreover, increasing the L/R ratio from 0 to 2 with void spaces of 2.9 mm and 11 mm reduced the radiation heat transfer coefficient, h(r), by 31%, while the convection heat transfer coefficient, h(c), at the panel upper surface increased by 174%. Changing only the panel surface shape from flat to concave and segmented enhanced the thermal performance and thermal comfort inside the indoor environment.

The thermal potential of a new multifunctional sliding window
Mostafa M.S. Ahmed, Ali Radwan, Ahmed A. Serageldin, Ahmed Abdeen, Essam M. Abo-Zahhad, Katsunori Nagano
Solar Energy, 226, 389, 407, Elsevier Ltd, 15 Sep. 2021
English, Scientific journal, Nowadays, new generations of building envelope need to manage the energy exchange between outdoor and indoor environment responsively and save the building energy. A significant amount of solar heat gain in buildings comes through the windows. The transparent envelope also must answer to visual requirements allowing for external vision but guarantying comfort conditions. In this framework, this article aims to test numerically the thermal performance of a new design of multifunctional glazed window combining the most recent technologies used in building envelopes. Five distinct window designs combing phase change material (PCM), vacuum glazing (VG), photovoltaic (PV), and air cavity were numerically tested for hot weather conditions. The proposed window designs slide inside the wall of the building. A comprehensive transient Multiphysics model coupling the thermo-electric model of the PV, melting and solidification model of the PCM, and the heat transfer mechanisms in the vacuum and air gaps are developed. The model is step by step validated with data in the literature. Various PCM types and PCM thickness are investigated. Among the five investigated window designs, the result showed that the window, including the air gap with PV, PCM cavity, and VG, is the optimal design for the indoor air's thermal isolation. Simultaneously, the PCM with a melting point of 35 ˚C and thickness of 50 mm is the best performance material in a hot arid region in summer at Cairo. The proposed multifunction window generated maximum electrical power intensity of 162 W/m2 at received solar radiation of 1000 W/m2.

Thermal performance of ceiling radiant cooling panel with a segmented and concave surface: Laboratory analysis
Minzhi Ye, Ahmed A. Serageldin, Ali Radwan, Hideki Sato, Katsunori Nagano
APPLIED THERMAL ENGINEERING, 196, PERGAMON-ELSEVIER SCIENCE LTD, Sep. 2021
English, Scientific journal, Radiant heating/cooling systems are thermally efficient and economically feasible alternatives to conventional ventilated air conditioning. This study experimentally investigates the thermal performance of the ceiling radiant cooling panel (CRCP) with a segmented and concave surface by evaluating the thermal conditions inside a laboratory-scale room equipped with this new panel. The experiments were carried out under various operating conditions, where the fluid inlet temperature and fluid flow rate were controlled independently. The indoor air temperature, air velocity, and humidity ratio were recorded and analyzed, and the temperatures of the upper and lower panel surfaces and the surrounding surfaces were also measured. Subsequently, the heat transfer properties were calculated and summarized. When the inlet water temperature decreased from 24 degrees C to 15 degrees C at the same flow rate of 4 L/min, the average air temperature decreased by over 1.5 degrees C, and the total heat flux increased by 50%. The heat flux changed significantly with variations in the inlet water temperature, while changing the flow rate had a smaller impact. The radiant heat transfer coefficient of the panel was determined to be 5.0 W/(m2.K), while the convective heat transfer coefficient exhibited an exponential relationship with the temperature difference between the surface of the panel and the surrounding air. Moreover, the proposed panel enhanced the convective heat flux by 2.6 times and the total heat flux by 45%, compared with a flat panel, and achieve the same improvement as the panel with inclined fins, but with a smaller surface area. In addition, the panel achieved the same air temperature with a lower flow rate, which shows the potential for energy saving.

Life cycle cost analysis of ground source heat pump system based on multilayer thermal response test
Hobyung Chae, Katsunori Nagano, Takao Katsura, Yoshitaka Sakata, Ahmed A. Serageldin
Energy and Building, 261, 111427, ELSEVIER SCIENCE SA, Sep. 2021, [Peer-reviewed]
English, Scientific journal, The purpose of this study was to determine the life cycle cost (LCC) of a ground source heat pump (GSHP) system based on the results of a multilayer thermal response test (TRT). Previous studies by our research team suggested the possibility of significantly reducing the total borehole length, based on the results of the multilayer TRT to identify the partial groundwater flow. In the present study, it was validated that the borehole heat exchangers reduced by the results of the partial groundwater flow could operate with a sustainable performance of the GSHP system over an extended period. LCCs of the GSHP system for 30 years were analyzed in three areas with different climatic and geological conditions. Based on these results, the proposed method demonstrates a reasonable cost reduction advantage compared with conventional TRT analysis. The multilayer TRT analysis was validated using root mean square error and temperature error, obtained from temperature comparison between the numerical simulation results and the TRT data. The required total borehole length was achieved when the performance of the GSHP system attained the target performance for heating, after 30 years of operation. The GSHP system, designed by considering the partial groundwater flow, can reduce 30-40% of the total borehole length and 15-20% of the LCC, compared with the system designed based on conventional TRT analysis.(c) 2021 Elsevier B.V. All rights reserved.

Evaluating Groundwater Flow Effects for Enhancement of Ground-Source Heat Pipes in the Case of the Toyohira River Alluvial Fan, Japan　　　　　　　　　　　　　　　
Yoshikata Sakata, Johnson Chishimba, Masataka Mochizuki, Katsunori Nagano
Hydrology, 8, 3, 135, Sep. 2021, [Peer-reviewed]

Design and thermal analysis of a new multi-segmented mini channel based radiant ceiling cooling panel
Ali Radwan, Takao Katsura, Lan Ding, Ahmed A. Serageldin, Ahmed I. EL-Seesy, Katsunori Nagano
Journal of Building Engineering, 40, 102330, 102330, Elsevier BV, Aug. 2021
Scientific journal

Numerical optimization of a novel ceiling radiant cooling panel combined with wall attached ventilation system　　　　　　　　　　　　　　　
Minzhi Ye, Ahmed A. Serageldin, Katsunori Nagano
Case Studies in Thermal Engineering, 26, 101066, Aug. 2021, [Peer-reviewed]

Parametric analysis, response surface, sensitivity analysis, and optimization of a novel spiral-double ground heat exchanger　　　　　　　　　　　　　　　
Ahmed A. Serageld, Ali Radwan, Takao Katsura, Yoshitaka Sakata, Shigeyuki Nagansaka, Nagano Katsunori
Energy Conversion and Management, 240, 114251, Jul. 2021, [Peer-reviewed]

Nationwide determination of required total lengths of multiple borehole heat exchangers under variable climate and geology in Japan
Yoshitaka Sakata, Takao Katsura, Katsunori Nagano
International Journal of Geo-information, 10, 4, 205, 205, Apr. 2021, [Peer-reviewed]
Scientific journal

R&D Aimed for Low-Cost and High-Efficient Closed-Loop Ground Source Heat Pump System, Design & Performance Prediction Tool and Potential Evaluation System Using Geoinformation
長野克則
伝熱, 60, 251, 13, 18, 日本伝熱学会, Apr. 2021, [Peer-reviewed], [Lead author]
Japanese

Evaluating variability of ground thermal conductivity within a steep site by history matching underground distributed temperatures from thermal response tests
Yoshitaka Sakata,Takao Katsura, Ahmed A. Serageldin, Katsunori Nagano, Motoaki Ooe
Energies, 14, 7, 1872, 1872, MDPI AG, Mar. 2021, [Peer-reviewed]
Scientific journal, The variability of ground thermal conductivity, based on underground conditions, is often ignored during the design of ground-source heat pump systems. This study shows a field evidence of such site-scale variations through thermal response tests in eight borehole heat exchangers aligned at a site on a terrace along the foothills of mountains in northern Japan. Conventional analysis of the overall ground thermal conductivity along the total installation length finds that the value at one borehole heat exchanger is 2.5 times that at the other seven boreholes. History matching analysis of underground distributed temperature measurements generates vertical partial ground thermal conductivity data for four depth layers. Based on the moving line heat source theory, the partial values are generally within a narrow range expected for gravel deposits. Darcy velocities of groundwater are estimated to be 74–204 m/y at the borehole with high conductivity, increasing in the shallow layers above a depth of 41 m. In contrast, the velocities at the other seven boreholes are one-to-two orders of magnitude smaller with no trend. These high and low velocity values are considered for the topography and permeability. However, the relatively slow groundwater velocities might not apparently increase the partial conductivity.

Development of a new vacuum-based photovoltaic/thermal collector, and its thermal and exergy analyses
Ali Radwan, Takao Katsura, Saim Memon, Essam M. Abo-Zahhad, O. Abdelrehim, Ahmed A. Serageldin, Mohamed R. Elmarghany, Asmaa Khater, Katsunori Nagano
Sustainable Energy and Fuels, 4, 12, 6251, 6273, Dec. 2020, [Peer-reviewed]
Scientific journal, Photovoltaic-thermal (PV/T) solar collectors convert solar radiation into electrical power and heat. Part of received solar energy can be lost to the atmosphere from the top surface of the PV/T module, especially in windy regions. Thus, in this study, a new vacuum-based photovoltaic thermal (VPV/T) collector is designed and comparatively analyzed with the conventional PV/T collector. The new design differs from the conventional PV/T design by including a vacuum layer above the silicon wafer. Besides, to enhance the heat dissipation from the silicon wafer in the VPV/T design to the thermal absorber, the thicknesses of ethylene-vinyl acetate and tedlar polyester tedlar layers underneath the silicon wafer are decreased. A comprehensive 3D conjugate thermal model is developed and validated. The comparison is conducted under steady and transient conditions. The effects of Reynolds number (Re), wind speed, glass emissivity, and vacuum pressure are investigated. And finally, exergy analysis results for both designs are compared. The results showed that the new VPV/T collector has accomplished a 26.6% increase in the thermal power without changing the electrical power gain at Re of 50 and solar irradiance of 1000 W m-2. In addition, the vacuum pressure degradation from 0.01 Pa to 10 Pa slightly decreases the gained thermal power of the new VPV/T collector. A further increase in the vacuum pressure from 10 Pa to 1.013 × 105 Pa significantly decreases the gained thermal power with a slight increase in the electrical power. Furthermore, the total predicted VPV/T and the conventional PV/T exergy efficiency are 39.6% and 32%, respectively. This journal is

Analysis of a vacuum-based photovoltaic thermal collector
Ali Radwan, Takao Katsura, Saim Memon, Essam M. Abo-Zahhad, Ahmed A. Serageldin, Katsunori Nagano
Energy Reports, 6, 236, 242, Dec. 2020, [Peer-reviewed]
Scientific journal, In this study, a new design of photovoltaic thermal (PV/T) collector is proposed. This design uses a vacuum layer above the silicon wafer and not exists in the traditional PV/T collector. This layer is used to decrease the heat loss from the top surface of the PV/T collector. The analysis is conducted using a 3D thermal modeling. The new collector design with the vacuum layer achieved a 26.6% increase in the thermal power while keeping the electrical the same at Reynolds number of 50 and solar radiation of 1000 W/m . In addition, the degradation of the vacuum pressure slightly influence the thermal performance while increasing the vacuum pressure from 0.01 Pa to 10 Pa. While further increase in the vacuum pressure from 10 Pa to 1.013×10 Pa substantially decreases the gained thermal power with insignificant increase in the electrical power. 2 5

Performance enhancement of borehole ground source heat pump using single U-tube heat exchanger with a novel oval cross-section (SUO) and a novel spacer
Ahmed A. Serageldin, Yoshitaka Sakata, Takao Katsura, Katsunori Nagano
Sustainable Energy Technologies and Assessments, 42, 100805, Dec. 2020, [Peer-reviewed]
Scientific journal, This study introduces a new, efficient, and cost-effective spacer to maintain the space between the upward and downward U-tube legs of a single U-tube with an oval cross-section. Therefore, short-term and long-term transient numerical simulations were performed to compare the thermal and energy performance of the ground source heat pump system with both a single U-tube with an oval cross-section coupled with a novel spacer, and a conventional single U-tube with a circular cross-section. The impact of using different spacer cross-sections (circular cross-section, oval cross-section, and an oval cross-section with fins, double spacers with circular cross-section), materials, and length on the thermal performance was examined. Finally, a straightforward economic study was implemented to examine the feasibility of utilizing the proposed spacer. A single aluminum spacer with oval and fins cross-section decreases the borehole thermal resistance (R ) by 25 % and 28 % compared with single U-tube with an oval cross-section and single U-tube with a circular cross-section, respectively. Furthermore, it improves the coefficient of performance (COP) in winter by 9.5 % compared with single U-tube with circular cross-section. Thus, it saves 497 kW·h operating energy. Finally, the economic study shows that the simple payback period for using the single aluminum spacer with oval and fins cross-section of length 50 m is 3.8 y. b

Thermal performance analyses of a new multi-segmented minichannel-based radiant ceiling cooling panel
Lan Ding, Takao Katsura, Ali Radwan, Katsunori Nagano
Energy Reports, 6, 1409, 1415, Dec. 2020, [Peer-reviewed]
Scientific journal, In this study, a new multi-segmented radiant ceiling panel with different tilt angle is proposed. The effect of segments inclination angle and panel area increase for the same coverage ratio are investigated. A 3-dimension computational fluid dynamics model is developed and validated for these comparisons. It is concluded that increasing segments angle decrease the ratio between the radiation and total heat exchange. In addition, using the multi-segments allows the air to move from the plenum area to the central zone of the room. Further, the operative temperature for the ±45° is minimum with best value for the predicted mean vote and lowest value of predicted percentage dissatisfied compared with ±30°, ±75° and 90°. And increasing the panel area with 300% increased the panel cooling capacity by around 140% for the same indoor temperature of 25.3±0.2°C and the same ceiling area. This research found that the cooling capacity is proportional to the area of the radiant panel, but under the same ceiling area, when the area ratio exceeds a certain value, the thermal performance will decrease due to the reduction of the convection heat transfer coefficient.

Simulation on annual performance of solar adsorption heat pump system using composite natural mesoporous material in different metrological conditions
Sung Hoon Seol, Katsunori Nagano, Junya Togawa
Renewable Energy, 162, 1587, 1604, Dec. 2020, [Peer-reviewed]
Scientific journal, This paper presents research on the annual cooling performance of the solar adsorption heat pump (AHP), which applies a composite natural mesoporous material that is referred to as Wakkanai Siliceous Shale (WSS) as an adsorbent. One way to efficiently employ thermal energy is to reduce the sensible heat loss that occurs when changing the ad/desorption mode by extending the cycle time. The average temperature of the regeneration water for the half cycle time of 14 min was approximately 8.7 °C higher than that for the half cycle time of 8 min. In this case, the system with WSS + LiCl 20 wt% showed an increase in AHP cooling performance of approximately 15%. The higher adsorption capacity of the WSS composite enabled operation of the system with a longer cycle time. In terms of the annual operation of the AHP, although the achievable AHP cooling energy in Dubai was higher than that in Hawaii, much higher cost savings can be obtained in Hawaii than in Dubai because of the high electricity cost in Hawaii. The estimated payback periods in Hawaii and Dubai are 6.6 years and 15.6 years, respectively.

CFD simulation on the thermal performance of a novel radiant ceiling cooling panel (RCCP) system with segmented and concave surface combined with forced ventilation
Minzhi Ye, Ahmed A. Serageldin, Katsunori Nagano
ENERGY REPORTS, 6, 1519, 1524, ELSEVIER, Dec. 2020, [Peer-reviewed]
English, Scientific journal, The radiant ceiling cooling panel (RCCP) system has been proved thermally efficient and economically but it cannot prevent hot air stream from window individually. Therefore, this study integrated a forced ventilation system with a new RCCP with a segmented and concave surface. In this study, a three-dimensional CFD model is developed and validated with the experimental results. Whereas, the indoor thermal comfort and cooling performance of the proposed coupling are numerically investigated, analyzed, and compared with the RCCP system with ventilation. The results show that the ventilation system is effective to prevent the hot air stream, and it also enhanced the cooling performance of the RCCP. Furthermore, the parametric study and sensitivity analysis are carried out to optimize the operating condition of these two systems to maximize the cooling capacity of the RCCP system and increases the panel surface temperature to mitigate the possible condensation. (C) 2020 The Authors. Published by Elsevier Ltd.

Current Problems for Shallow Geothermal Utilization and Approaches to Solve in Groundwater Researches　　　　　　　　　　　　　　　
Yoshitaka Sakata, Katsunori Nagano
地下水学会誌, 62, 4, 515, 524, Dec. 2020, [Peer-reviewed]
Japanese

Erratum to “Method for calculation of ground temperature in scenarios involving multiple ground heat exchangers and groundwater advection” [Energy Build. 220 (2020) 110000] (Energy & Buildings (2020) 220, (S0378778819336564), (10.1016/j.enbuild.2020.110000))
Takao Katsura, Yutaka Shoji, Yoshitaka Sakata, Katsunori Nagano
Energy and Buildings, 227, Elsevier Ltd, 15 Nov. 2020
English, Scientific journal, The publisher regrets the following part was disappeared in the article published in Energy &
Building, 220 (2020) 110000. <
3.2. Experimental calculation In order to examine the calculation with the developed method, we conducted an experimental calculation of the underground temperature for the case with multiple GHEs and time-variable heat flux conditions. In this experimental calculation, we considered 8 GHEs, each of length 100 m. Fig. 11 shows the arrangement of the multiple GHEs. Table 3 indicates the soil properties considered for the experimental calculation. To compare the difference due to the groundwater flow existence, we conducted the calculation assuming the groundwater velocity conditions of 0 m year−1 and 100 m year−1. The hourly annual heat extractions shown in Fig. 12 were divided according to the number of GHEs, and the ground temperature was calculated by considering the divided values. The experimental calculation was conducted for 2 years (17,520 h). Fig. 13 shows the calculated hourly average temperature variation of the surfaces of the GHEs. The result for the case with groundwater flow demonstrates the restrained temperature variation compared to that without groundwater flow. With reference to the calculation speed, we used a popular laptop computer with a 2.8 GHz single core processor and 16 GB memory for the experimental calculation. The required calculation time of the experimental simulation with multiple GHEs and time-variable heat flux conditions was 94.0 s for the 2-year simulation period. Therefore, the results of the experimental calculation indicate that the calculation time can be significantly reduced by using the developed method compared to the numerical analysis. In addition, it is possible to use a simple interface, as shown in Fig. 14, if the developed calculation method is applied. In other words, we can input the conditions mentioned in this section without the need for a complex procedure. Also, it is easy to change the calculation conditions, such as the number of GHEs, their arrangement, groundwater advection velocity, and angle of groundwater flow.>
The publisher would like to apologise for any inconvenience caused.

Estimation of ground thermal conductivity through indicator kriging: Nation-scale application and vertical profile analysis in Japan
Yoshitaka Sakata, Takao Katsura, Katsunori Nagano
Geothermics, 88, 101881, 101881, Elsevier BV, Nov. 2020, [Peer-reviewed]
Scientific journal

Experimental study and development of a low-cost 1 kW adsorption chiller using composite adsorbent based on natural mesoporous material
Fang He, Katsunori Nagano, Junya Togawa
Energy, 209, 118365, 15 Oct. 2020, [Peer-reviewed]
Scientific journal, This study aims to develop a low-cost and highly efficient adsorption chiller (AHP). A laboratory-scale AHP with a capacity of 1 kW and transparent body was developed to observe the valve's operation and condensed water. A natural mesoporous material, WSS impregnated with 20 wt % LiCl was used as an adsorbent to reduce the initial cost and filled into aluminum corrugated heat exchangers (HEX). Foundation performance experiments were conducted, and the COP of 0.45 and SCP of 0.41 kW/kg were obtained under the following experimental conditions: regeneration at 80 °C, condensation, and sorption at 30 °C, chilled water of 15 °C, and cycle time of 14 min. Further, heat recovery was introduced and experimentally studied to reduce the regeneration heat amount, and the heat balance for this AHP was evaluated. It was confirmed that two types of heat recoveries could improve the COP for this AHP up to 0.54 when the outlet temperature of both adsorbers was 55 °C. The COP could be further improved to 0.57, based on the calculation for the heat balance. This AHP has advantages of high SCP as compared with AHPs in other formal studies, although some details need to be studied in the future.

Thermal analysis of a new sliding smart window integrated with vacuum insulation, photovoltaic, and phase change material
Mostafa Ahmed, Ali Radwan, Ahmed Serageldin, Saim Memon, Takao Katsura, Katsunori Nagano
Sustainability (Switzerland), 12, 19, 7846, Oct. 2020, [Peer-reviewed]
Scientific journal, A zero-energy building (ZEB) requires an innovative integration of technologies, in which windows play a paramount role in energy reduction, storage, and generation. This study contributes to four innovative designs of sliding smart windows. It integrates air-gap (AG), phase change material (PCM), photovoltaic (PV), and vacuum glazing (VG) technologies. These smart sliding windows are proposed to generate electricity along with achieving efficient thermal insulations and heat storage simultaneously. A two-dimensional multiphysics thermal model that couples the PCM melting and solidification model, PV model, natural convection in the cavity, and the surface-to-surface radiation model in the vacuum gap are developed for the first time. The model is validated with data in the literature. The transient simulations were carried out to investigate the thermo-electrical performance of a window with an area of 1 m by 1 m for the meteorological conditions of Kuwait city on the 10th of June 2018, where the window was oriented to south direction. The results showed that the total solar heat energy gain per unit window area is 2.6 kWh, 0.02 kWh, 0.22 kWh, 1.48 kWh, and 0.2 kWh for the double AG, AG + PV + PCM + VG, PV + PCM + VG, AG + PV + PCM, and the ventilated AG + PV + PCM + VG, respectively. The results elucidate the advantages of the integration of VG in this integrated sliding smart window. The daily generated PV electrical energy in these systems is around 1.3 kWh, 1.43 kWh, and 1.38 kWh for the base case with double AG, PV + PCM + VG, and the ventilated AG + PV + PCM + VG respectively per unit window area.

Development of simulation tool for ground source heat pump systems influenced by ground surface
Takao Katsura, Yoshitaka Sakata, Lan Ding, Katsunori Nagano
Energies, 13, 17, 4491, Sep. 2020, [Peer-reviewed]
Scientific journal, The authors developed a ground heat exchanger (GHE) calculation model influenced by the ground surface by applying the superposition theorem. Furthermore, a simulation tool for ground source heat pump (GSHP) systems affected by ground surface was developed by combining the GHE calculation model with the simulation tool for GSHP systems that the authors previously developed. In this paper, the outlines of GHE calculation model is explained. Next, in order to validate the calculation precision of the tool, a thermal response test (TRT) was carried out using a borehole GHE with a length of 30 m and the outlet temperature of the GHE calculated using the tool was compared to the measured one. The relative error between the temperatures of the heat carrier fluid in the GHE obtained by measurement and calculation was 3.3% and this result indicated that the tool can reproduce the measurement with acceptable precision. In addition, the authors assumed that the GSHP system was installed in residential houses and predicted the performances of GSHP systems using the GHEs with different lengths and numbers, but the same total length. The result showed that the average surface temperature of GHE with a length of 10 m becomes approximately 2 C higher than the average surface temperature of a GHE with a length of 100 m in August. ◦

Erratum to “Method for calculation of ground temperature in scenarios involving multiple ground heat exchangers and groundwater advection” [Energy Build. 220 (2020) 110000]　　　　　　　　　　　　　　　
Takao Katsura, Yutaka Shoji, Yoshitaka Sakata, Katsunori Nagano
Energy and Buildings, 227, 110409, Sep. 2020, [Peer-reviewed]

Experimental investigation on a vapor injection heat pump system with a single-stage compressor
Hongzhi Liu, Katsunori Nagano, Takao Katsura, Yue Han
Energies, 13, 12, 3133, Jun. 2020, [Peer-reviewed]
Scientific journal, In this study, a heat pump of 10 kW with vapor injection using refrigerant of R410A was developed. A vapor injection pipe connecting a gas-liquid separator at the outlet of the main expansion valve and the suction of a single-stage rotary compressor was designed. The heating performance of this vapor injection heat pump was investigated and analyzed at different compressor frequencies and primary temperatures. The experimental results show that for the heat pump without vapor injection, the heating capacity increased linearly with the compressor frequency, while the heating coefficient of performance (COP) decreased linearly with the compressor frequency for each tested primary temperature. The developed vapor injection technique is able to increase the heat pump system's heating capacity and heating COP when the injection ratio R falls into the range 0.16-0.17. The refrigerant mass flow rate can be increased in the vapor injection heat pump cycle due to the decreased specific volume of the suction refrigerant. The power consumption of vapor injection heat pump cycle almost remains the same with that of the conventional heat pump cycle because of the increased refrigerant mass flow rate and the decreased compression ratio. Finally, it was found that the developed vapor injection cycle is preferable to decreasing the compressor's discharge temperature.

Analysis of relaxation time of temperature in thermal response test for design of borehole size　　　　　　　　　　　　　　　
Hobyung Chae, Katsunori Nagano, Takao Katsura, Yoshitaka Sakata, Ahmed A. Serageldin, Takeshi Kondo
Energies, 13, 13, 3297, 3297, Jun. 2020, [Peer-reviewed]

Thermal and electrical performances of semi-transparent photovoltaic glazing integrated with translucent vacuum insulation panel and vacuum glazing　　　　　　　　　　　　　　　
Ali Radwan, Takao Katsura, Saim Memon, Ahmed A. Serageldin, Makoto Nakamura, Katsunori Nagano
Energy Conversion and Management, 215, 112920, May 2020, [Peer-reviewed]

Method for calculation of ground temperature in scenarios involving multiple ground heat exchangers and groundwater advection　　　　　　　　　　　　　　　
Takao Katsura, Yutaka Shoji, Yoshitaka Sakata, Katsunori Nagano
Energy & Buildings, 220, 110000, 110000, Apr. 2020, [Peer-reviewed]

A New Simulation Model for Vertical Spiral Ground Heat Exchangers Combining Cylindrical Source Model and Capacity Resistance Model
Takao Katsura, Takashi Higashitani, Yuzhi Fang, Yoshitaka Sakata, Katsunori Nagano, Hitoshi Akai, Motoaki OE
Energies, 13, 6, 1339, 1339, MDPI AG, 13 Mar. 2020, [Peer-reviewed]
English, Scientific journal, Considering the heat capacity inside vertical spiral ground heat exchanger (VSGHEX) in the simulation is one of the most noteworthy challenge to design the ground source heat pump (GSHP) system with VSGHEXs. In this paper, a new simulation model for VSGHEXs is developed by combining the ICS model with the CaRM. The developed simulation model can consider the heat capacity inside VSGHEX and provide dynamic calculation with high speed and appropriate precision. In order to apply the CaRM, the equivalent length was introduced. Then, the equivalent length was approximated by comparing the results of the CaRM and the numerical calculation. In addition, the calculation model of the VSGHEX was integrated into the design and simulation tool for the GSHP system. The accuracy of the tool was verified by comparing with the measurements. The error between supply temperatures of the measurements and calculation is approximately 2 °C at the maximum. Finally, assuming GSHP systems with VSGHEXs, whose spiral diameter was 500 mm and depth was 4 m, were installed in residential houses in Japan, the required numbers of VSGHEXs were estimated. The results showed a strong correlation between the total heating or cooling load and the required number. Therefore, the required number can be estimated by using the simplified approximate equation.

Thermal performance analysis of a new structured-core translucent vacuum insulation panel in comparison to vacuum glazing: Experimental and theoretically validated analyses
Takao Katsura, Saim Memon, Ali Radwan, Makoto Nakamura, Katsunori Nagano
SOLAR ENERGY, 199, 326, 346, PERGAMON-ELSEVIER SCIENCE LTD, Mar. 2020
English, Scientific journal, The notion at which, nowadays, building sector is being recognized to be nearly zero-energy buildings (NZEBs) relies partly on the thermal performance of its fabric insulation. Vacuum glazing (VG) technology attracted the research interest as an option to reduce heat loss through windows. However, the total glazing thermal transmittance (U-value) for VG increases with the use of smaller glazing area due to the edge-seal effects, due to the thermal short-circuit around the edges and the overall construction cost of VG leading to an unaffordable option to deal with energy conservation of buildings. Therefore, this study aims to propose a new structured core transparent vacuum insulation panel (TVIP) to accomplish insulation for the windows without edge sealing effect, with lower cost and can be easily retrofitted to the conventional windows of the existing buildings. To do this, VG and TVIP were constructed and their thermal conductivity were measured using heat flow meter apparatus. In addition, a 3D finite volume model considering the effect of surface to surface radiation, gas conduction, and thermal bridges through the spacer material and sealing material is developed. The model is validated with the experiments in this work and with the data for VG in the literature. The effect of vacuum pressure increase is simulated to mimic the vacuum deterioration problem and the effect of glazing size on the insulation performance of both VG and TVIP were investigated. The results indicate that for a smaller glazing area of less than 30 cm x 30 cm, the TVIP accomplished lower U-value compared with the VG at vacuum pressure of 0.1 Pa and 1 Pa. While, at a vacuum pressure of 10 Pa, the TVIP attained a lower U-value over the entire range of the investigated glazing sizes. Further, the edge-seal effect in the VG is diminished with the use of TVIP. Furthermore, the material cost per unit area of the TVIP is three times less than the cost of VG at laboratory scale. The results of the current study can guide vacuum window designers and researchers to further enhance the performance of TVIP based window to compete for the VG in the markets.

Water sorption property and cooling performance using natural mesoporous siliceous shale impregnated with LiCl for adsorption heat pump　　　　　　　　　　　　　　　
Junya Togawa, Asami Kurokawa, Katsunori Nagano
Applied Thermal Engineering, 173, 115241, Mar. 2020, [Peer-reviewed]

The Effect of Groundwater Flow on the Thermal Performance of a Novel Borehole Heat Exchanger for Ground Source Heat Pump Systems: Small Scale Experiments and Numerical Simulation
Ahmed A. Serageldin, Ali Radwan, Yoshitaka Sakata, Takao Katsura, Katsunori Nagano
Energies, 13, 6, 1418, 1418, MDPI AG, Mar. 2020, [Peer-reviewed]
Scientific journal, New small-scale experiments are carried out to study the effect of groundwater flow on the thermal performance of water ground heat exchangers for ground source heat pump systems. Four heat exchanger configurations are investigated; single U-tube with circular cross-section (SUC), single U-tube with an oval cross-section (SUO), single U-tube with circular cross-section and single spacer with circular cross-section (SUC + SSC) and single U-tube with an oval cross-section and single spacer with circular cross-section (SUO + SSC). The soil temperature distributions along the horizontal and vertical axis are measured and recorded simultaneously with measuring the electrical energy injected into the fluid, and the borehole wall temperature is measured as well; consequently, the borehole thermal resistance (Rb) is calculated. Moreover, two dimensional and steady-state CFD simulations are validated against the experimental measurements at the groundwater velocity of 1000 m/year with an average error of 3%. Under saturated conditions without groundwater flow effect; using a spacer with SUC decreases the Rb by 13% from 0.15 m·K/W to 0.13 m·K/W, also using a spacer with the SUO decreases the Rb by 9% from 0.11 m·K/W to 0.1 m·K/W. In addition, the oval cross-section with spacer SUO + SSC decreases the Rb by 33% compared with SUC. Under the effect of groundwater flow of 1000 m/year; Rb of the SUC, SUO, SUC + SSC and SUO + SSC cases decrease by 15.5%, 12.3%, 6.1% and 4%, respectively, compared with the saturated condition.

Thermal performance analysis of a new structured-core translucent vacuum insulation panel in comparison to vacuum glazing: Experimental and theoretically validated analyses　　　　　　　　　　　　　　　
Takao Katsura, Saim Memon, Ali Radwan, Makoto Nakamura, Katsunori Nagano
Solar Energy, 199, 326, 346, Feb. 2020, [Peer-reviewed]

Modeling of adsorption heat pump system based on experimental estimation of heat and mass transfer coefficients　　　　　　　　　　　　　　　
Sung-Hoon Seol, Katsunori Nagano, Junya Togawa
Applied Thermal Engineering, 171, 115089, Feb. 2020, [Peer-reviewed]

Evaluating Thermal Performance of Oval U-Tube for Ground-Source Heat Pump Systems from in Situ Measurements and Numerical Simulations
Yoshitaka Sakata, Ahmed A. Serageldin, Takao Katsura, Motoaki Ooe, Katsunori Nagano
Environmental Science and Engineering, 1483, 1491, 2020, [Peer-reviewed]
International conference proceedings, A new-shaped U-tube with an oval cross-section has been developed to boost the heat transfer inside the borehole heat exchanger and to reduce the heat exchanger depth and the drilling cost. In addition, it could fit efficiently inside tight boreholes, so it is fitting for installing GSHPs at urban areas. This research evaluated the effectiveness in situ by thermal response tests at total 20 borehole heat exchangers in three sites, Japan. The in situ borehole thermal resistances were about 10–30% smaller with the oval U-tube than the circle U-tube. However, the spacers had an imperceptible impact probably because of the soil pressure to the U-tubes. Also, transient numerical CFD simulations were carried out to calculate the long-term performance of a household GSHP system with oval U-tubes. It indicated that the required lengths of a borehole heat exchanger could be reduced by about 14% in the fine soils and 15–19% in the coarse soils.

Adsorption desalination using natural mesoporous material impregnated with chloride substances
Mitsuki Izawa, Fang He, Katsunori Nagano, Junya Togawa
Refrigeration Science and Technology, 321, 326, 2020, [Peer-reviewed]
International conference proceedings, Desalination is effective to solve problems of pure water shortage in many water stressed regions. However, the conventional technologies consume vast quantities of energy derived from fossil fuels, which cause increase of CO2 emissions and high operating cost. On the other hand, adsorption desalination (AD) employs the renewable energy sources and low temperature waste heat sources, which contributes to reducing fossil energy. This paper presents the performance of a laboratory scale AD whose thermal capacity is 100W using natural mesoporous material called Wakkanai siliceous shale (WSS) impregnated with chloride substances as the adsorbent. This material has been developed for the low-cost adsorption heat pump in our laboratory. The performance ratio (PR) and the specific daily water production (SDWP) are 0.41 and 25.0 m .t .day , respectively, at the half cycle time of 5 minutes. Finally, PR and SDWP were improved to 0.49 and 37.0 m .t .day , respectively with the cooling capacity recovery. 3 -1 -1 3 -1 -1

Heat transfer performance analysis of a novel curved surface radiant ceiling panel: Numerical approach
Minzhi Ye, Ahmed A. Serageldin, Katsunori Nagano
16th Conference of the International Society of Indoor Air Quality and Climate: Creative and Smart Solutions for Better Built Environments, Indoor Air 2020, 2020
International conference proceedings, Although many studies had investigated the heating and cooling capabilities of a flat surface radiant ceiling panel, and a few tried to change the surface structure as well. Yet no one examined the concave curved and segmented surface, which is considered in the present study. Different curvature cord length to curvature radius ratios (L/R) from 0 to 1.5 (5 cases) are examined. This study also includes a comprehensive heat transfer analysis and exhausting thermal comfort assessment for each case. Three dimensional CFD model is developed and validated against the experimental results in the literature, the model shows a good agreement with acceptable accuracy. As a result, changing only the panel surface shape can enhance thermal performance and improve the indoor thermal comfort.

Enhancement of cooling performance of metal ceiling radiant cooling system by a novel panel with a concave and segmented surface
Ahmed A. Serageldin, Minzhi Ye, Katsunori Nagano
Proceedings of the International Conference of Architectural Science Association, 2020-November, 481, 490, 2020, [Peer-reviewed]
International conference proceedings, This paper proposed a novel ceiling radiant cooling panel (CRCP) with a concave and segmented surface. Full-scale laboratory experiments are conducted to study the heat transfer characteristics extensively and thermal comfort conditions inside an environmental chamber coupled with four CRCP-s with a concave and segmented surface under various operating conditions. Moreover, a three-dimensional finite volume simulation was developed to study the conjugated heat transfer and fluid flow, as well as the thermal comfort conditions. The results show that the simulation achieves a good agreement with experimental results with an accuracy of 98.9 %. The proposed panel enhances the convection heat transfer by 61% and 23 % compared with the flat and inclined surface panels. The fluid inlet temperature of 18 ºC and the fluid flow rate of 1.5 L/min achieve the lowest temperature difference between the head and ankle level of 0.18 ºC; also, it shows the neutral PMV of 0. So, changing only the panel surface shape from ordinary flat to a concave and segmented surface gives a chance to use a lower fluid flow rate and higher inlet water temperature and maintains an acceptable comfortable level, which reveals the potential of energy saving by using this new panel.

Estimation of fast groundwater flow velocity from thermal response test results　　　　　　　　　　　　　　　
Hobyung Chae, Katsunori Nagano, Yoshitaka Sakata, Takao Katsura, Takeshi Kondo
Energy & Buildings, 206, 109571, Nov. 2019, [Peer-reviewed]
English

Energy Conservation using New Structured-Core and Transparent Vacuum Insulation Panels: Numerical Simulation with Experimental Validation　　　　　　　　　　　　　　　
Takao Katsura, Ali Radwan, Zhang Yang, Makoto Nakamura, Katsunori Nagano
Solar Energy, 193, 885, 905, Oct. 2019, [Peer-reviewed]
English, Scientific journal

地中熱ヒートポンプシステムの間接型地中熱交換器必要長さ全国500 mグリッド算定と評価　　　　　　　　　　　　　　　
阪田義隆, 葛隆生, 長野克則
土木学会論文集G, 75, 5, I_177, I_183, Sep. 2019, [Peer-reviewed]

A Study on Size Determination of Ground Heat Exchangers in Closed-type Ground Source Heat Pump System: Simulation-based individual Determination and its Nationwide　　　　　　　　　　　　　　　
Yoshitaka Sakata, Takao Katsura, Katsunori Nagano
Journal of Geothermal Research Society of Japan, 41, 3, 75, 89, Jul. 2019, [Peer-reviewed]
Japanese, Scientific journal

地中熱ヒートポンプシステム:北海道における導入可能性の評価
阪田義隆, 葛隆生, 長野克則
北海道自然エネルギー研究, 13, 13, 17‐26, 26, 30 Jun. 2019, [Peer-reviewed]
Japanese

全熱交換素子および稚内層珪質頁岩ローターの臭気移行特性　　　　　　　　　　　　　　　
外川純也, 青木智恵美, 長野克則
日本冷凍空調学会論文集, 36, 3, 109, 119, Jun. 2019, [Peer-reviewed]

Demonstration of A Complete Non-condensing Desiccant Air Conditioning System
鍋島佑基, 外川純也, 長野克則
日本冷凍空調学会論文集, 36, 3, 97, 108, 日本冷凍空調学会, Jun. 2019, [Peer-reviewed]
Japanese

A new experimental method to separate interfacial and internal mass transfer on coated adsorbent　　　　　　　　　　　　　　　
Sung-Hoon Seol, Katsunori Nagano, Junya Togawa
Applied Thermal Engineering, 159, 113869, May 2019, [Peer-reviewed]

A design and simulation tool for ground source heat pump system using energy piles with large diameter
Takao Katsura, Katsunori Nagano, Yohitaka Sakata, Hisashi Wakayama
International Journal of Energy Research, 43, 4, 1505, 1520, Wiley, 25 Mar. 2019, [Peer-reviewed]
Scientific journal

Study on building surface and indoor temperature reducing effect of the natural meso-porous material to moderate the indoor thermal environment　　　　　　　　　　　　　　　
Tazia Rahman, Katsunori Nagano, Junya Togawa
Energy and Buildings, 191, 59, 71, Mar. 2019, [Peer-reviewed]

500 M-GRIDDED ESTIMATION OF REQUIRED LENGHS FOR A CLOSED-TYPE BOREHOLE HEAT EXCHANGER IN A GROUND-SOURCE HEAT PUMP SYSTEM
Yoshitaka SAKATA, Takao KATSURA, Katsunori NAGANO
Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research), 75, 5, I_177, I_183, Japan Society of Civil Engineers, 2019, [Peer-reviewed]
Scientific journal

Development of Design and Performance Prediction Tool for Ground Source Heat Pump System with Variable Water Volume and Variable Refrigerant Flow
葛隆生, 中村靖, 長野克則, 阪田義隆
日本冷凍空調学会論文集, 35, 4, 313‐324, 31 Dec. 2018, [Peer-reviewed]
Japanese

Thermo-hydraulic performance of the U-tube borehole heat exchanger with a novel oval cross-section: Numerical approach
Ahmed A. Serageldin, Yoshitaka Sakata, Takao Katsura, Katsunori Nagano
Energy Conversion and Management, 177, 406, 415, Elsevier BV, Dec. 2018, [Peer-reviewed]
English, Scientific journal

Importance of groundwater flow on life cycle costs of a household ground heat pump system in Japan
Yoshitaka Sakata, Takao Katsura, Katsunori Nagano
Transactions of the Japan Society of Refrigerating and Air, 35, 4, 365, 365, Dec. 2018, [Peer-reviewed]
English

Life‐cycle‐cost based analysis of borehole heat exchanger lengths considering groundwater flow effects in a residence as a case study
阪田義隆, 葛隆生, 長野克則
地下水学会誌, 60, 4, 483‐494, 30 Nov. 2018, [Peer-reviewed]
Japanese

Development of a probability‐based geoinformation system using water well database: part II: evaluation of an averaged hydraulic conductivity as a probability‐weighted average
阪田義隆, 葛隆生, 長野克則, 丸井敦尚
地下水学会誌, 60, 3, 273‐288, 31 Aug. 2018, [Peer-reviewed]
Japanese

地中熱利用ヒートポンプシステム導入によるCO2排出量削減の全国評価：戸建住宅への暖房利用を例として　　　　　　　　　　　　　　　
阪田義隆, 葛隆生, 長野克則
土木学会論文集G(環境), 74, 5, I_359, I_367, Aug. 2018, [Peer-reviewed]
Japanese

Development of Slim and Translucent Vacuum Insulation Panels: Part 1-Investigation on Core Material with Structural Calculation and Heat Transfer Calculation and Trial Production of Vacuum Insulation Panels and Their Performance Evaluation
葛隆生, YANG Zhang, 相原昌博, 中村真人, 長野克則
太陽エネルギー, 44, 2, 49, 57, 一般社団法人 日本太陽エネルギー学会, 31 Mar. 2018, [Peer-reviewed]
Japanese, Scientific journal, <p>This study aims at developing the vacuum insulation panels (VIPs) with small thickness and light transmittance to contribute retrofitting insulation for existing buildings. The authors are focus on producing the slim and translucent VIPs with vacuum layer which hold by spacers. Firstly, the outlines of vacuum layer type VIPs were introduced. Next, the structural calculation was carried out as a mechanical analysis to determine the specific array of spacers to pillars supported type. Then, the heat transfer model applying the one-dimensional calculation was developed to predict the insulation performance of VIPs. After that, the authors conducted an experiment applying the guarded hot plate method in order to verify the apparent thermal conductivity of VIP according to the set pressure. The result showed that the apparent thermal conductivity was less than 0.1 W/(m<tt>･</tt>K) and was enough low. Finally, the VIPs with different core materials were trial produced and the apparent thermal conductivity were evaluated by the heat flux method.</p>

全国地中熱ポテンシャルマップ構築への取り組み―大阪平野における地中熱利用の可能性と課題―
阪田義隆, 葛隆生, 長野克則, 丸井敦尚
地下水技術, 59, 2,3,4, 41, 50, 30 Mar. 2018, [Peer-reviewed], [Invited]
Japanese

Development of adsorptiopn heat pump using natural mesoporous materials with Licl part-1 evaluation of water adsorption ability of adsorbent　　　　　　　　　　　　　　　
Junya Togawa, Seiya Oomae, Hiroaki Kuroishi, Asami Kurokawa, Katsunori Nagano
ACRA 2018 - 9th Asian Conference on Refrigeration and Air-Conditioning, Asian Conference on Refrigeration and Air Conditioning (ACRA), 2018
English, International conference proceedings, This study is a development of adsorption heat pump (AHP) using a natural meso-porous material of Wakkanai siliceous shale (WSS) impregnated with lithium chloride. In this paper, the powder of WSS impregnated with lithium chloride was prepared as the adsorbent for AHP. In addition, aluminum fibers were added into the adsorbent to improve the thermal conductivity. Water vapor adsorption performance was evaluated from the sorption isotherm curve at the various temperature. The theoretical adsorption amount was estimated as 0.33 g/g for the 20 wt % LiCl-WSS (Regeneration, evaporation and condensation temperature were 80, 15, 30 ºC, respectively). For the evaluation of cooling power, this adsorbent was filled in between the gaps of the fin tube of heat exchanger. The COP was increased with increasing the adsorption time. The COP cooling and SCP showed 0.44 and 398 W/kg, respectively.

Development of adsorption heat pump using natural mesoporous materials with LiCl Part-3 Optimum design and performance predictions of 10 kW AHP using 3-D numerical simulation program　　　　　　　　　　　　　　　
Katsunori Nagano, Mayu Inoue, Junya Togawa
ACRA 2018 - 9th Asian Conference on Refrigeration and Air-Conditioning, Asian Conference on Refrigeration and Air Conditioning (ACRA), 2018
English, International conference proceedings, This paper is the part three of the development of a cost-effective adsorption heat pump (AHP) using a natural meso-porous material which is Wakkanai siliceous shale (WSS) impregnated with LiCl. The optimum design of an adsorbent bed on a corrugate type heat exchanger and the prediction of the 10 kW scale AHP performances are examined by using a developed 3-D numerical simulation program. The actual effective thermal conductivity of the adsorbent mixed with aluminum fibers and its overall mass transfer coefficient are measured. The heat and mass transfer characteristics are analyzed through the calculating results and the optimum size of the corrugate type heat exchanger are discussed. The parametric analyses show that the largest volumetric cooling power (VCP) is 210 W/L and COP is 0.45 when the thickness of is 12 mm. Next, influence of an interval of a water channel is discussed. It is understood that a reasonable p is 6 mm. In this case COP and VCP is 0.49 and170 W/L, respectively.

Development of simulation tool for the shallow ground source heat pump system using vertical spiral ground heat exchangers and its application　　　　　　　　　　　　　　　
Takashi Higashitani, Takao Katsura, Katsunori Nagano, Hitoshi Akai, Motoaki Oe
ACRA 2018 - 9th Asian Conference on Refrigeration and Air-Conditioning, Asian Conference on Refrigeration and Air Conditioning (ACRA), 2018
English, International conference proceedings, Vertical spiral ground heat exchanger(VSGHEX) is paid attention for cost reduction of ground source heat pump(GSHP) systems. However, VSGHEX has huge thermal capacity so that the temperature calculation around a VSGHEX needs to take account for the thermal capacity. In this paper, an approach based on capacity resistance model(CaRM) was presented. The model was validated comparing with numerical model. In addition, the case study of GSHP installation by VSGHEXs was carried out.

Simulation tool for ground-source heat pump system with multiple ground heat exchangers　　　　　　　　　　　　　　　
Takao Katsura, Katsunori Nagano
ASHRAE Transactions, 124, 92, 101, ASHRAE, 2018
English, International conference proceedings, This paper discusses a developed simulation tool for ground-source heat pump (GSHP) systems with multiple ground heat exchangers (GHEXs) by combining the infinite cylindrical source (ICS) solution with the infinite line source (ILS) solution. In the developed tool, superposition of the temperature field in space was applied to calculate the underground temperature due to heat injection from multiple GHEXs. Then, the ICS solution was applied for temperature change due to heat injection of the considered GHEX and the ILS solution was applied for temperature change due to the heat injection of other neighboring GHEXs. In this paper, firstitis shown thatthe temperature response of the ICS can be regarded as that of the ILS in cases where the distance from the heat source to the considered point becomes larger. Next, the method for the high-speed calculation of temperature change due to heat injection of the multiple GHEXs is described. In addition, the advantages of the calculation method in the developed tool are introduced. Finally, considering the case of a GSHP system installed in an office building in Tokyo, the temperature change of the primary side of the heat pump is calculated, and its reproducibility is verified by comparison with measured values. The results show the difference between the calculated and measured values to be up to 5°C (9°F) and less than 2°C (3.6°F) in most cases, thus confirming the reproducibility of this tool.

Measurement of Temperature and Humidity Distribution in Desiccant Rotor
NABESHIMA Yuki, MATSUURA Daisuke, KIMURA Ryushi, NAGANO Katsunori
Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers, 35, 3, 181, 181, Japan Society of Refrigerating and Air Conditioning Engineers, 2018
Japanese,

The objective of this study is to clarify the temperature and humidity distribution in the desiccant rotor. Thus we focused on the small sensors for "Internet of Things". By installing the small sensor in the desiccant rotor, continuous measurement inside the rotating material become possible. First part of this report, correcting method for sensor response delay when temperature and humidity input were changed was examined. We conducted an evaluation test to obtain the delay characteristics of the small sensors. The results of the test, the response delay showed the same characteristics regardless of the differences in air temperature and humidity. The correction equations for the temperature and humidity were obtained. Second part of this report, adsorption/desorption measuring test was conducted. To clarify the humidity distribution, a desiccant rotor with small sensors was created. Two sensors were buried at 5mm points from each surfaces of rotor. As shown in Fig.A-1, the amount of dehumidification increased by increasing the rotational speed. Fig.A-2 shows temperature and humidity distribution in the circumferential direction of desiccant rotor. In this case, it can be seen the temperature distributions were agreed with values measured with fixed thermocouples. In addition, the distributions of absolute humidity due to the change in rotational speed was clarified. The peaks of absorption/desorption are shifted backward by increasing of the rotational speed. Also, breakthrough was confirmed in the regeneration zone under the condition of 7 rph.

Investigation into Window Insulation Retrofitting of Existing Buildings Using Thin and Translucent Frame-Structure Vacuum Insulation Panels
Zhang Yang, Takao Katsura, Masahiro Aihara, Makoto Nakamura, Katsunori Nagano
Energies, 11, 2, 1, 13, 2018, [Peer-reviewed]
English

Multilayer-concept thermal response test: Measurement and analysis methodologies with a case study
Yoshitaka Sakata, Takao Katsura, Katsunori Nagano
GEOTHERMICS, 71, 178, 186, PERGAMON-ELSEVIER SCIENCE LTD, Jan. 2018, [Peer-reviewed]
English, Scientific journal, A multilayer-concept thermal response test is proposed by incorporating the standard test with a pair of fiber-optic distributed temperature sensors in the U-tube. The heating exchange rates in any vertical segment are estimated from the sequential temperature data. The ground thermal conductivity of each sub-layer is calculated using the line heat source model, in which the heating exchange rates and the temporal temperature slopes are determined at their convergence as the thickness increases. The convergence analysis continues downward until reaching the borehole bottom to obtain the stepwise conductivity. A case study of Sapporo, Japan, is shown with the sensitivity analysis of the convergence threshold.

Development of Desiccant System using Wakkanai Siliceous Shale(9th Report)Study of Purge Zone Introduction to Reduce Supply Air Temperature
鍋島佑基, 長野克則, 外川純也, 都筑和代
日本冷凍空調学会論文集, 35, 1, 49, 59, 日本冷凍空調学会, 2018, [Peer-reviewed]
Japanese

稚内層珪質頁岩を用いたデシカント空調の開発 ―第8報： 全熱交換素子と組み合わせたユニットの検討―　　　　　　　　　　　　　　　
鍋島佑基, 長野克則, 外川純也, 都筑和代
日本冷凍空調学会論文集, 35, 1, 11, 22, 2018, [Peer-reviewed]
Japanese

Performance of LiCl Impregnated Mesoporous Material Coating over Corrugated Heat Exchanger
Hongzhi Liu, Katsunori Nagano, Junya Togawa
Energies, 11, 1565, 1, 5, 2018, [Peer-reviewed]
English

確率加重平均法による地盤の有効熱伝導率の推定に関する研究
阪田義隆, 葛隆生, 長野克則
日本地熱学会誌, 40, 1, 33, 44, Jan. 2018, [Peer-reviewed]
Japanese

Development of numerical heat transfer and the structural model to design slim and translucent vacuum layer type insulation panels to retrofitting insulation in existing buildings
Zhang Yang, Takao Katsura, Masahiro Aihara, Makoto Nakamura, Katsunori Nagano
Energies, 10, 12, 1, 15, MDPI AG, 01 Dec. 2017, [Peer-reviewed]
English, Scientific journal, The authors develop slim and light-weight vacuum insulation panels (VIPs) by producing vacuum layers with spacers and plastic plates. The developed VIPs have the advantages of a low cost and easy installation, thus facilitating retrofitting insulation of existing buildings. In addition, one of the developed VIPs is slim and translucent so it can be easily used for windows in an internal installation. In this paper, the authors first propose a vacuum layer type slim translucent VIP and focus on a reasonable design method. Next, the authors introduce the design process in which the structural design is obtained with element mechanical analysis and a three-dimensional analysis is conducted for the VIP element. In the study, a heat transfer model is used to predict the insulation performance through finite element analysis (FEA). Subsequently, the authors perform an experiment to measure the thermal conductivity in a guarded hot plate apparatus to validate the performance prediction. Finally, case studies are performed to confirm how the different design conditions affect the insulation performance. The optimum design of the vacuum layer type slim and translucent VIP will have a sufficient structural strength to hold and maintain the vacuum layer. The thermal conductivity is approximately 0.007 W/(m · K), which can effectively improve the insulation performance in applications.

Facilities introduction planning of a microgrid with CO2 heat pump heating for cold regions
Shin'ya Obara, Katsunori Nagano, Masaki Okada
ENERGY, 135, 15, 486, 499, PERGAMON-ELSEVIER SCIENCE LTD, Sep. 2017, [Peer-reviewed]
English, Scientific journal, Fulfilling heating requirements in cold regions using fossil fuels can create problems in terms of excessive greenhouse gas emissions, making the replacement of conventional heating systems with electric heat pumps powered by renewable energy sources a desirable goal. To help address this issue, this paper examines the introduction of independent microgrids consisting of natural gas combined cycle and large-scale photovoltaic (L-PV) generating sources accompanied by electric heat pump capacity. These results help to clarify the optimal output rate of L-PV to the overall output of such a microgrid. Furthermore, this paper examine a dynamic-characteristics model of a CO2 split cycle heat pump in terms of the error of the supply-and-demand balance. This paper show that introduction of the proposed microgrid can significantly reduce the environmental and economic impact. This study clarified the environmental capability and economical efficiency of the microgrid for cold regions under management of electric power quality. When an electric power unit price and CO2 emissions of the proposal microgrid are referred to the domestic price based on official announcements of the Japanese government, the amount of CO2 reduction and electric power unit price of the proposal system can expect 48% and 30% reduction in Sapporo, respectively. (C) 2017 Elsevier Ltd. All rights reserved.

全国地盤物性データベースを用いた地中熱利用ヒートポンプ暖房システムの導入効果分析
阪田義隆, 葛隆生, 長野克則
土木学会論文集G(環境）, 73, 5, I-89, I-98, Sep. 2017, [Peer-reviewed]
Japanese

井戸データベースを用いた地盤情報推定システムの開発：地質区分のクリギング推定と逐次パラメータ決定法
阪田義隆, 葛隆生, 長野克則, 丸井敦尚
地下水学会誌, 59, 2, 105, 123, Jun. 2017, [Peer-reviewed]
Japanese

Field Analysis of Stepwise Effective Thermal Conductivity along a Borehole Heat Exchanger under Artificial Conditions of Groundwater Flow
Yoshitaka Sakata, Takao Katsura, Katsunori Nagano, Manabu Ishizuka
Hydrology, 4, 2, 21, 21, MDPI AG, 29 Mar. 2017, [Peer-reviewed]
English, Scientific journal

Energy Saving Effect of Desiccant Ventilation System Using Wakkanai Siliceous Shale
Yuki Nabeshima, Jun-ya Togawa, Katsunori Nagano, Tsuzuki Kazuyo
AIP Conference Proceedings, 1892, 160002, AMER INST PHYSICS, 2017, [Peer-reviewed]
English, International conference proceedings, The nuclear power station accident resulting from the Great East Japan Earthquake disaster has resulted in a constrained electricity supply. However, in this Asian region there is high temperature and high humidity and consequently dehumidification process requires a huge amount of energy. This is the reason for the increasing energy consumption in the residential and commercial sectors. Accordingly, a high efficiency air-conditioning system is needed to be developed. The desiccant ventilation system is effective to reduce energy consumption for the dehumidification process. This system is capable of dehumidifying without dew condensing unlike a conventional air-conditioning system. Then we focused on Wakkanai Siliceous Shale (WSS) as a desiccant material to develop a new desiccant ventilation system. This is low priced, high performance, new type of thing. The aim of this study is to develop a desiccant ventilation unit using the WSS rotor which can be regenerated with low-temperature by numerical calculation. The results of performance prediction of the desiccant unit, indicate that it is possible to regenerate the WSS rotor at low-temperature of between 35 -45 degrees C. In addition, we produced an actual measurement for the desiccant unit and air-conditioning unit. This air-conditioning system was capable to reduce roughly 40 % of input energy consumption.

A microgrid comprising an interconnected solid oxide fuel cell and hydraulic generator for use in a sustainable city
Shin’ya OBARA, Katsunori NAGANO, Jorge MOREL, Takao KATSURA, Yoshitaka SAKATA, Kazushige KIKUTA
Mechanical Engineering Journal, 4, 2, 1, 15, 2017, [Peer-reviewed]
English

ESTIMATION OF EFFECTIVE THERMAL CONDUCTIVITIES ACCORDING TO MULTI-LAYERS BY THERMAL RESPONSE TEST WITH A SET OF FIBER OPTICS IN A U-TUBE
SAKATA Yoshitaka, KATSURA Takao, ZHAI Jian, NAGANO Katsunori
Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research), 74, 3, 50, 60, Japan Society of Civil Engineers, Sep. 2016, [Peer-reviewed]
Japanese,  This study improves thermal response test (TRT) by using a set of fiber-optic distributed temperature sensors (DTSs) to estimate effective thermal conductivities in multi-layered formations. These sensors are installed into both inlet and outlet pipes (a U-tube) to obtain vertical profiles of heat transfer fluid temperature at TRT in more detail than those obtained by single DTS as in previous studies. When the borehole is constructed in a formation with several horizontally layers, this study analyzes the effective thermal conductivity in each layer under the assumption of line heat source. In the analysis, the slopes of fluid temperature on logarithmic elapse time are averaged within each layer, and heat exchange rate is calculated using a sum of linear slopes of temperature with depth in both inlet and outlet pipes. Offset and averaging span for DTS calibration are evaluated by laboratory sink tests at constant temperatures. Finally, an example of the proposed method at Asahikawa City, Hokkaido, Japan, is shown. In the example, the formation consists of three layers; unconsolidated gravel, clay, and pre-Quaternary shale. The solutions of the effective thermal conductivity in each layer are converged commonly when the thicknesses for analysis are larger than 20 meters. The conductivity in the upper-gravelly layer is about 1.5 times larger than those in the mid-clayey and lower-shale layers, probably due to groundwater flow advection. The thickness-weighted average of conductivities in the three layers is almost equal to the conductivity by conventional TRT with Pt100 sensors. The solutions are also valid in terms of total heat exchange rate. In addition, a series of effective thermal conductivities is invariable among the cases of DTS data: 1) calibrated in the heating period, 2) smoothed additionally by the FFT low-pass filter, 3) randomly sampled as the boot-strap method, and 4) calibrated in the recovery period.

複層地盤を考慮した地中熱交換器のシミュレーションツールの開発とその応用
葛隆生, 長野克則, 中村靖
冷凍, 91, 1064, 399‐400, Jun. 2016, [Peer-reviewed]
Japanese

Field measurement of indoor air quality and airborne microbes in a near-zero energy house with an earth tube in the cold region of Japan
Yoonkyung Kang, Katsunori Nagano
SCIENCE AND TECHNOLOGY FOR THE BUILT ENVIRONMENT, 22, 7, 1010, 1023, TAYLOR & FRANCIS INC, 2016, [Peer-reviewed]
English, Scientific journal, This study was conducted to evaluate the level of microbial contamination of indoor air during 3years for two residences in one building equipped with heat recovery ventilation devices and located in Kimobetsu town of Hokkaido, Japan. This article documents a case study aimed at monitoring the microbes contaminations indoors for a safe use of energy saving ventilation devices and sanitary indoor air. This articles describes an investigative approach with three components. First, the authors evaluated the indoor air quality and microbial concentration by comparing the concentrations of particulate matter (PM10 and PM2.5), carbon dioxide, and airborne bacteria and fungi of indoor air and outdoor air during spring, summer and winter. Second, the microbial concentration inside an earth tube and a fixed sensible heat exchanger was evaluated by measuring the airborne microbial concentration of the supply air. Third, the authors assessed the possibility of microbial contamination inside the earth tube using the fungal index and by measuring temperature and relative humidity at the tube's outlet airflow. The results showed that the total concentration of airborne fungi was higher in summer than in spring or winter and that the fungal genera Cladosporium sp. and Penicillium sp. were dominant in the samples. Additionally, it was found that the environment inside the earth tube allowed easy growth of fungi from May to September with the highest fungal index measured in August. It was also confirmed that the earth tube did not affect the supply air for a building constructed 4years ago.

A study of the energy consumption and airborne microbe concentration in the Sapporo underground walkway, in a cold region of Japan
Yoonkyung Kang, Katsunori Nagano
SCIENCE AND TECHNOLOGY FOR THE BUILT ENVIRONMENT, 22, 7, 1050, 1059, TAYLOR & FRANCIS INC, 2016, [Peer-reviewed]
English, Scientific journal, The present study sought to evaluate the energy consumption, indoor air quality and concentration of airborne bacteria and fungi in the Sapporo underground walkway, which is in a cold region of Japan. The energy consumption, temperature, relative humidity, and carbon dioxide concentrations of the underground walkway were investigated for 4years from its opening in 2011 (until 2014). The temperature, relative humidity, and carbon dioxide concentrations were automatically detected using sensors and data from Sapporo city hall. To evaluate the microbial contamination in the ventilation system and indoors, the concentrations of airborne bacteria and fungi were measured on 2days (a weekday and a weekend day) during opening hours in both summer and winter. The concentration of airborne microbes in the supply air, indoor air, and outside air was compared. Species of airborne bacteria were identified using 16S rDNA sequence analysis. The energy use intensities were decreased in 2013, when the walkway temperature was changed during both winter and summer. The carbon dioxide concentration in the walkway was maintained below 1000ppm. The number of airborne bacteria and fungi in the supply air from the ceiling diffuser was lower than those in the outdoor and indoor air. These results indicate that both energy consumption and indoor air quality were maintained in the walkway throughout the 4-year period. This study could be helpful for developing the related standards for indoor air quality and for developing control strategies to properly operate air conditioning and ventilation systems in underground spaces.

Installing the low flow circulation ground source heat pump system in the technology center and its performance analysis
Yasushi Nakamura, Takao Katsura, Katsunori Nagano
AIJ Journal of Technology and Design, 21, 49, 1139, 1142, Architectural Institute of Japan, 01 Oct. 2015, [Peer-reviewed]
Japanese, Scientific journal, The authors analyzed the low flow circulation ground source heat pump system, which has the variable water volume control in the primary side, in the office building. It is confirmed that the electric power of circulation pump was reduced as 85% compared to the constant water volume. The difference between the system COP including the circulation pump and the heat pump COP was small. Additionally, the effect of energy saving compared to the conventional air source heat pump system was 33%.

Development of Simulation Tool for Ground Heat Exchanger Considering Multiple Geological Layer and Its Application
KATSURA Takao, NAGANO Katsunori, NAKAMURA Yasushi
Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers, 32, 3, 335, 344, Japan Society of Refrigerating and Air Conditioning Engineers, Sep. 2015, [Peer-reviewed]
Japanese, The subject of this study is to establish design and operation method of the ground source heat pump system affected by ground water flow. In order to investigate relation between the ground temperature response around ground heat exchanger (GHEX) and ground water velocity, multilayered ground simulation model is developed. It was shown that heat medium temperature is not kept in steady state in thermal response test when the groundwater flow in all geological layer is not generated. It is suggested that the thickness of geological layer with ground water flow and the ground water velocity can be estimated by analyzing the apparent effective thermal conductivity, which is obtained by the thermal resp_-1 onse _-1test . Also, if the apparent effective thermal conductivity at elapsed time of 50 h is more than 4.5 W・m ・K ,the ratio of thickness of geological layer that have ground water flow with the velocity of 300 m・y^-1 is more than 25 % in all geological layer.

Development of Simulation Tool for Design and Performance Prediction for Hybrid Ground Source Heat Pump Systems Combined with Cooling Towers
KATSURA Takao, NAGANO Katsunori, NAKAMURA Yasushi
Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers, 32, 3, 325, 334, Japan Society of Refrigerating and Air Conditioning Engineers, Sep. 2015, [Peer-reviewed]
Japanese, In order to investigate design and operating method of the hybrid ground source heat pump (HGSHP) system combined cooling tower, the authors developed a computer aided simulation tool for the system. Performance of the HGSHP system combined cooling tower, which has been installed in a new office building in Kitakyushu City, is predicted with the simulation tool. The result shows the HGSHP system can operate with high cooling seasonal performance factor (SPF) of 5.4. In addition, the authors investigated connection sequence and operation method of the HGSHP system. The result shows that the HGSHP system provides the highest cooling SPF when the cooling tower is connected in series with the ground heat exchangers (GHEXs) and the water as heat carrier fluid is circulated to the cooling tower ahead of the GHEXs. The system performance is additionally improved by using the simple cooling tower's activation control by the inlet temperature of heat pump unit.

Experimental testing of a small sorption air cooler using composite material made from natural siliceous shale and chloride
Hongzhi Liu, Katsunori Nagano, Atsushi Morita, Junya Togawa, Makoto Nakamura
APPLIED THERMAL ENGINEERING, 82, 82, 68, 81, PERGAMON-ELSEVIER SCIENCE LTD, May 2015, [Peer-reviewed]
English, Scientific journal, A sorption air cooler experimental setup including a reactor and fin tube condenser/evaporator was built The reactor was developed with inner copper fins and dual layers of curing copper meshes. Composite material made by impregnating LiCI into the mesopores of Wakkanai Siliceous Shale (WSS) micro-powders was packed between the intervals of two fins. Heat transfer was enhanced by the attached fins, and the dual layers of curing meshes installed between each interval of two fins were designed to improve the sorbate mass transfer. On the other hand, the fin-tube evaporator/condenser with fins outside is valuable for improving the convective heat transfer between the functional water inside the evaporator/condenser and the flowing outside heat transfer medium, air.
The sorption capacity of the composite material increased dramatically after being impregnated with LiCI. Among the four tested samples, WSS + 40 wt% LiCl exhibits the best performance. A regeneration temperature of 80 degrees C appears to be optimal for obtaining both a high COP and high specific cooling power. A lower condensation temperature can increase the cooling power. The sorption and desorption times of 60 min yield a reasonable compromise between cooling COP and mass specific cooling powers. The developed sorption air cooler system using WSS + 40 wt% LiCl can store heat at temperatures below 100 degrees C and produce cooling energy with a cooling coefficient of performance (COP) of approximately 0.3. (C) 2015 Elsevier Ltd. All rights reserved.

Research and Development of Packaged Air-conditioners Intended to Improve Annual Efficiency
YOSHIDA Yasutaka, NAGANO Katsunori, KOYAMA Masaki, TOKUSA Kenji
Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers, 32, 3, 207, 219, Japan Society of Refrigerating and Air Conditioning Engineers, 2015
Japanese, We developed a packaged air-conditioner that improves annual efficiency. The developed system has a highly efficient wide-range compressor that improves the heat pump efficiency in the low air-conditioning loads, a heat exchanger that is optimized for both a vapor compression refrigeration system and refrigerant natural circulation system, an adaptive controller that suppresses unnecessary start-and-stop compressor operation and a refrigerant natural circulation system that enables highly efficient operation under a low ambient temperature condition. For this developed packaged air-conditioner, we tested and proved that
(i) the annual efficiency of the system was 1.51 times compared with that of the conventional one in a thermostatic chamber,
(ii) the efficiency for actual use was 1.58 times for the collaboratory of Hokkaido University in Sapporo and 1.67 times for the CAE room of Hitachi Appliances, Inc. in Shizuoka at ambient temperature in 2012, and
(iii) by revising the data the efficiency for actual use was 1.55 times for a common office in Tokyo at normal ambient temperature.

Research and Development of Packaged Air-conditioners Intended to Improve Annual Efficiency:－1st Report: Design of Packaged Air-conditioner
YOSHIDA Yasutaka, NAGANO Katsunori, KOYAMA Masaki, TOKUSA Kenji
Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers, 32, 2, 121, 133, Japan Society of Refrigerating and Air Conditioning Engineers, 2015
Japanese, We propose a packaged air-conditioner that improves the annual efficiency by 50% compared with that of the conventional one. To achieve this aim, we developed (i) a highly efficient wide-range compressor that improves the heat pump efficiency in the case of 30-40% air-conditioning loads, (ii) a heat exchanger that is optimized for both a vapor compression refrigeration system and refrigerant natural circulation system, (iii) an adaptive controller that suppresses unnecessary start-and-stop compressor operation, and (iv) a refrigerant natural circulation system that enables highly efficient operation under a low ambient temperature condition. We evaluated the annual efficiency of the developed system and proved that it is 1.52 times more efficient compared with that of the conventional one in simulation studies.

A composite material made of mesoporous siliceous shale impregnated with lithium chloride for an open sorption thermal energy storage system
Hongzhi Liu, Katsunori Nagano, Junya Togawa
SOLAR ENERGY, 111, 186, 200, PERGAMON-ELSEVIER SCIENCE LTD, Jan. 2015, [Peer-reviewed]
English, Scientific journal, In this study we developed a composite mesoporous honeycomb element based on Wakkanai siliceous shale (WSS) and lithium chloride (Lid), to act as a thermal energy storage medium that can directly contact the functional air in an open sorption thermal energy storage system. The mesopores of the WSS were filled with LiCl to improve its sorption capability as a new sorption thermal energy storage material. The honeycomb thermal energy storage element impregnated with 9.6 wt% LiCl was installed in the developed open sorption thermal energy storage experimental setup. The experimental results showed that this impregnated honeycomb element could be regenerated at a lower regeneration temperature, even at 60 degrees C, and also exhibited high volumetric heat storage density. Furthermore, at a certain regeneration temperature, the element impregnated with 9.6 wt% LiCl supplied air with a relatively constant high outlet air temperature compared to the element filled with 22.4 wt% CaCl2 under the same inlet air conditions in the sorption process, and the proposed element was less affected by the humid air flow rate. The sorption rate was observed to significantly affect the outlet air temperature during the sorption process. We confirmed that the developed composite material filled with LiCl exhibited good stability, boosting the possibility of its long-term use. (C) 2014 Elsevier Ltd. All rights reserved.

Numerical simulation of an open sorption thermal energy storage system using composite sorbents built into a honeycomb structure
Hongzhi Liu, Katsunori Nagano
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 78, 648, 661, PERGAMON-ELSEVIER SCIENCE LTD, Nov. 2014, [Peer-reviewed]
English, Scientific journal, A new composite mesoporous honeycomb material was developed to be a thermal energy storage medium that can contact the functional fluid directly. In our previous study, this honeycombed composite material acted as a promising sorption thermal energy storage medium in an open system, exhibiting a lower regeneration temperature as 80 degrees C, high volumetric heat storage density, and high stability. In the present study, a one-dimensional transient model was used to predict both the heat storage process (desorption process) and heat release process (sorption process) occurring in the open sorption thermal energy storage unit. Our model was validated using the experimental results obtained in our previous experiments, and a close agreement was observed for the sorption process. Some discrepancy was observed in the desorption process, but it has been explained. The sorption and desorption processes were simulated repeatedly for 20 cycles, whose result was also compared with the experimental result. The operating parameters of the open thermal energy storage system were evaluated to determine its operation performance. Finally, our open thermal energy storage system was assumed to be incorporated into a paint-drying system, within which the heat storage unit is regenerated for 10 h by the exhaust heat produced by a blower in the daytime and releases its stored heat during the nighttime for 14 h. The simulation result shows that almost 51.3% of the blower's waste heat can be reutilized if the proposed thermal energy storage system is incorporated. (C) 2014 Elsevier Ltd. All rights reserved.

The assessment of microbial contamination on energy recovery ventilation devices in the airtight-house　　　　　　　　　　　　　　　
Yoonkyung Kang, Katsunori Nagano, Makoto Nakamura
Indoor Air 2014 - 13th International Conference on Indoor Air Quality and Climate, 243, 249, International Society of Indoor Air Quality and Climate, 2014
English, International conference proceedings, To evaluate the level of microbe contamination of indoor air in a building installed with heat recovery ventilation devices. This study carried out in a residential house located in Hokkaido, Japan using a two-fold approach. First, the microbial concentration for heat recovery ventilation devices evaluated by measuring of airborne microbes indoors, around the ceiling diffuser and outdoors for spring, summer and winter. The total concentration of airborne microbes in the ceiling diffuser was lower than indoors. Second, the possibility of microbial contamination in the EAHE was evaluated and calculated using the fungal index by measuring temperature and relative humidity at the outlet airflow of the EAHE. The highest fungal index in the year was in August. We predicted the fungal growth in the EAHE in summer. The study can also be the basics baseline research for microbial contamination of a building installed with heat recovery ventilation devices.

Development of Desiccant System using Wakkanai Siliceous Shale:－7th Report: Controlling Conditions for Variety of Air Conditions－
NABESHIMA Yuki, NAGANO Katsunori, TOGAWA Junya
Trans.JSRAE, 31, 2, 111, 121, Japan Society of Refrigerating and Air Conditioning Engineers, 2014
Japanese, The objective of this study is to develop a desiccant system using Wakkanai Siliceous Shale (WSS). This article is the 7^th report of the series. In the previously articles, we reported a developed desiccant unit to achieve the target amount of dehumidification. This unit consists of two desiccant rotors and two heat exchangers for precooling and two heat exchangers for regeneration. In this paper, the authors have made a mathematical simulator of this desiccant unit to estimate the supply air conditions. The input conditions for regeneration and precooling have been evaluated by using this program. Firstly, the calculation precision of the program is confirmed by comparison with experimental results. Secondly, to minimize the input energy for the desiccant unit, input temperature for precooling and regeneration are evaluated. The conditions are obtained by controlling of precooling temperature depression without occurrence of dew condensing on the heat exchangers. Finally, performance prediction was carried out to obtain the energy saving efficiency in various areas in Japan. As a result, the unit reduced the energy for dehumidification by 30 % to 18 % in comparison to dew condensing process.

Study on permeability of water vapor and odor substances through some kinds of the permeable film
Yuka Kusama, Katsunori Nagano, Makoto Nakamura
AIJ Journal of Technology and Design, 20, 45, 637, 640, Architectural Institute of Japan, 2014, [Peer-reviewed]
Japanese, Scientific journal, This paper shows a study on permeability of water vapor and odor substances through six kinds of permeable film including viscos coated paper. The water vapor permeability can be indicated as proportional to the water vapor pressure difference. In addition, gas permeable barrier characteristics to odor substances such as ammonia and toluene were examined by using calibrated electrical gas sensors. It was concluded that the viscos coated paper has better water vapor and gas barrier performance compared to the others.

Evaluating the performance of a large borehole ground source heat pump for greenhouses in northern Japan
Huai Li, Katsunori Nagano, Yuanxiang Lai, Kazuo Shibata, Hikari Fujii
ENERGY, 63, 387, 399, PERGAMON-ELSEVIER SCIENCE LTD, Dec. 2013, [Peer-reviewed]
English, Scientific journal, The objective of this study was to use both field data and a numerical simulation to examine the long-term performance and environmental effects of a large GSHP (ground source heat pump) system that heats and cools industrial greenhouses in a cold region. A large vertical GSHP system was installed in the city of Akabira in the north of Hokkaido, Japan to provide heating and cooling for 12 greenhouses. The system has a maximum capacity of 640 and 648 kW for heating and cooling, respectively. The system was monitored and analyzed from Oct. 2010 through May 2011. The system had a COP (coefficient of performance) of 3.0 and SCOP (system coefficient of performance) of 2.7. The average heat extraction rate of the system was approximately 27.7 W/m. In addition, the ground temperature at a depth of 40 m decreased from approximately 7.8 degrees C to 0 degrees C after 8 months of operation. A numerical model of the system was developed in FEFLOW to predict its future behavior under conditions where the demand for heating surpasses the demand for cooling. The simulation results suggest that the system could maintain the heat exchange rate for several years without significantly compromising its performance. The risk of operating the system under unbalanced heating and cooling loads was addressed via case studies. Groundwater flow decreases the risk of operating the system when the heat extraction was much higher or lower than the heat injection. (C) 2013 Elsevier Ltd. All rights reserved.

Dynamic Simulation of Absorption Chiller with Variable Water Volume Control
FUJI Tatsuo, NAGANO Katsunori
Trans.JSRAE, 30, 3, 191, 202, Japan Society of Refrigerating and Air Conditioning Engineers, 30 Sep. 2013
Japanese, In the field of the central air-conditioning systems, variable water volume control (VWV) has been brought to attention to reduce the electricity consumed by water pumps, as well as to improve component performances. In the VWV of chilled water and cooling water passed through absorption chillers, what is important is the compatibility of energy saving and reliable operation while also controlling water flow rate and heat input. We dynamically simulated an absorption chiller to investigate this system. This chiller both calculates and transmits the controlled flow rate of chilled water and cooling water. Heat input control is simulated for both continuous and three position control. As the simulation result with assumption of cooling load profile, the estimated electricity reduction ratio is approximately 70% for the chilled water pump and 60% for the cooling water pump compared to the case of constant water volume system. On the other hand, cooling efficiency, defined as accumulated cooling calorie per accumulated heat input, is 99.5% of the constant water volume system, for continuous control. To improve the reliability of the operation, output temperature of chilled water is kept at 7±2°C in both continuous and three position controls.

Impact of control schemes of a monovalent inverter-driven water-to-water heat pump with a desuperheater in continental and subtropical climates through simulation
David L. Blanco, Katsunori Nagano, Masahiro Morimoto
APPLIED ENERGY, 109, 374, 386, ELSEVIER SCI LTD, Sep. 2013, [Peer-reviewed]
English, Scientific journal, An application of a novel steady-state simulation of a monovalent inverter-driven water-to-water heat pump with a desuperheater is presented. The simulation is capable of modeling and managing the different operation modes of the system such as combined space heating and domestic hot water, in order to provide realistic results, from which four control schemes based on two electricity tariff plans were developed. The schemes were tested on a subject low energy house for Tokyo and Sapporo, in Japan, for the coldest day of the year and for the heating season. Emphasis was given to the short-term domestic hot water storage. The results show that the application of the schemes with a flexible electricity tariff had lower cost over the scheme that used the flat rate pricing plan. Moreover, it was shown that no unique scheme was able to minimize the cost and electrical consumption for both locations. Additionally, a tradeoff between lowest cost and lowest energy consumption was identified for Sapporo. The results of this research could be applied to develop a more robust control on monovalent heat pump systems. (c) 2013 Elsevier Ltd. All rights reserved.

The performance improving of the ground source heat pump system that is combined with preheating make up water applying PHC foundation piles
Hisashi Wakayama, Katsunori Nagano, Takao Katsura
AIJ Journal of Technology and Design, 19, 42, 645, 648, 日本建築学会, Jun. 2013, [Peer-reviewed]
Japanese, Scientific journal, The subject of this paper is the heat source system with the Ground Source Heat Pump(GSHP) system in the PHC foundation piles. The thermal storage characteristics of the ground may be used to improve the GSHP system performance in this hospital by alternating the storing and restoring cycle on day-night basis in the summer season. The analysis during the commissioning shows the effectiveness of the GSHP system concept and improved system performance as a result of changing the operational condition.

Confirmation of the Sterilization Effect Using a High Concentration of Ozone Gas for the Bio-Cleanroom
Takuji Iwamura, Katsunori Nagano, Toshihiro Nogami, Noritomo Matsuki, Noriyoshi Kosaka, Hideharu Shintani, Miyoshi Katoh
BIOCONTROL SCIENCE, 18, 1, 9, 20, SOC ANTIBACTERIAL & ANTIFUNGAL AGENTS, JAPAN, Mar. 2013, [Peer-reviewed]
English, Scientific journal, A high-level aseptic environment must be maintained in bio-cleanrooms used for the manufacture of sterile products. In the past, formaldehyde gas was most commonly used to sterilize bio-cleanrooms, but due to strict residual limitations there has been a need to develop a less toxic alternative choice. The authors have developed a revolutionary new sterilization system using a high concentration of ozone gas and used this system to sterilize an actual bio-cleanroom. This system integrates the ozone gas generator with the air conditioning system by proper control. The design specifications for the system included an ozone gas concentration of 200ppm or more, relative humidity of 80% or more, and a sterilizing time of 120min. Blow vents and suction ports were placed to ensure a uniform airflow which would extend through the entire room during ozone gas sterilization. Tests regarding long-term material exposure to ozone gas were conducted when the system was introduced to distinguish usable and unusable materials. In an actually constructed cleanroom, simulations were used to predict the evenness of the diffusion of ozone gas concentration and relative humidity during ozone gas sterilization, and measurements of the actual indoor ozone gas concentration, temperature and relative humidity during sterilization revealed that the ozone concentration and relative humidity needed for sterilization had been achieved generally throughout the entire environment. In addition, the CT value (mg/m(3)(=ppm) x min), derived by multiplying the ozone gas concentration during ozone gas sterilization by the sterilization time, was equal to or greater than the target value of 24 x 10(3) (ppm . min). When the results of sterilization in a cleanroom were confirmed using a biological indicator (BI), negative results were obtained at all measurement points, demonstrating that sterilization was being performed effectively in the actual factory at which the ozone gas sterilization system had been introduced.

Development of a low flow circulation ground source heat pump multi-split system: Part 1 outlines of system concept and investigation on the optimum circulation flow rate of LF-GSHP system by field experiment
Yasushi Nakamura, Katsunori Nagano, Takao Katsura
Journal of Environmental Engineering (Japan), 78, 684, 165, 174, 日本建築学会, Feb. 2013, [Peer-reviewed]
Japanese, Scientific journal, The summary of this report is shown as follows. These studies aim at development of a low flow circulation (LF) ground source heat pump (GSHP) multi-split system in order to reduce energy consumption of circulation pumps in the GSHP system. This system applies low flow circulation system in primary side and multi-split system in secondary side. This paper contributes Part 1 in the series of these studies. First, the system concept and development planning are introduced. Then verification test of operation reliability of a water source multi-split heat pump were carried out in the manufacturing factory. As the result, the authors confirmed heating operation reliability of the heat pump even on conditions of inlet temperature of 10 °C and low flow circulation in primary side of 30 L/min In addition, field test apparatus of the LF-GSHP system were constructed to investigate the optimum circulation flow rate of the LF-GSHP system and demonstrate the effect of reduction of circulation pumps' electric power consumption When the cooling output is around 14 kW, the maximum SCOP of 5.31 is obtained on the condition that the flow rate is 30 L/min On the other hand, the flow rate condition of 96 L/min provides the highest SCOP value of 3.78 in case where the cooling output is around 24-28 kW. These suggest that variable water volume (VWV) control of the circulation pump can reduce circulation pumps' electric power consumption the most.

Honeycomb filters made from mesoporous composite material for an open sorption thermal energy storage system to store low-temperature industrial waste heat
Hongzhi Liu, Katsunori Nagano, Daichi Sugiyama, Junya Togawa, Makoto Nakamura
International Journal of Heat and Mass Transfer, 65, 471, 480, 2013, [Peer-reviewed]
English, Scientific journal, Today, a significant amount of low-temperature (<
100 C) industrial waste heat is directly discharged to the atmosphere. In this study, a new mesoporous composite material was developed as a sorption thermal energy storage material by utilizing its sorption and desorption properties. The composite material was formed by adding calcium chloride (CaCl2) to a mesoporous ceramic honeycomb filter. The main component of this ceramic is Wakkanai siliceous shale (WSS), which is found in northern Japan. The material test results demonstrated the following: (1) the composite material can sorb more water than the original ceramic material without dropping the CaCl 2 solution
(2) it can be regenerated at around 100 C
and (3) after 25 repetitive regeneration/sorption cycles, no decomposition or cracks were observed. The sorption isotherm was also undamaged. An open sorption thermal energy storage system was proposed, and the experimental setup was constructed. A low regeneration temperature (80-100 C) of the storage medium was achieved with this open system. In the case of the 22.4 wt% CaCl2 supported with the honeycomb filter (926.2 g
2 L), air was heated to a temperature greater than 40 C for a duration of 432 min by supplying air at 25 C at a flow rate of 3.0 m3/h when the regeneration temperature was 80 C. The volumetric heat storage density obtained was 272 MJ/m3, and the coefficient of the heat extraction performance during the heat release process was 65%. © 2013 Elsevier Ltd. All rights reserved.

Communication Problems and Solutions for International Students Speaking in Japanese
YANAGIMACHI Tomoharu, NAGANO Katsunori, ENAI Masamichi, BABA Naoshi
Journal of JSEE, 61, 4, 4_3, 4_7, Japanese Society for Engineering Education, 2013, [Peer-reviewed]
Japanese, Using the framework of conversation analysis, this paper examines the communication problems which international graduate students in engineering encounter when they have a Q&A session in Japanese after giving a presentation. This analysis focuses on (1) the phenomenon where international students fail to initiate a 'repair sequence' (Schegloff et al. 1977) to attain mutual understanding among participants when they do not understand a question from the floor ; and (2) why the conversational procedure of 'repair' is not employed by these students. Finally, this paper discusses what kinds of classroom activities can be introduced to solve these students' communication problems. These issues are also applicable to situations in which native speakers of Japanese use English or other foreign languages in engineering communities.

Experimental study on a monovalent inverter-driven water-to-water heat pump with a desuperheater for low energy houses
David L. Blanco, Katsunori Nagano, Masahiro Morimoto
APPLIED THERMAL ENGINEERING, 50, 1, 826, 836, PERGAMON-ELSEVIER SCIENCE LTD, Jan. 2013, [Peer-reviewed]
English, Scientific journal, In this study, a novel monovalent inverter-driven water-to-water heat pump with a desuperheater was developed. in this unique system, domestic hot water is produced at a constant temperature controlled by a variable flow rate and stored in a tank. The heat demand is constantly matched by the system through the use of an inverter-driven compressor, which eliminates the need for a buffer tank. Three heating configurations of the system were examined with respect to variable climate conditions and two space heating target temperatures: space heating (mode 1), domestic hot water production (mode 2) and a combination of both (mode 3). Mappings of the performance variables per frequency were constructed for mode 3. For the other modes, the highest COP was identified for each examined climate condition. The difference between modes I and 3 was less than 5% for every variable. The space heating target temperature had a strong influence on both modes, showing an average difference of 29% in the COP between 35 degrees C and 45 degrees C. Mode 2 exhibited a considerably reduced COP compared to the other modes, as well as the lowest refrigerant mass flow rate and highest compression ratio among the three modes. From the previous results and the examination of the compressor, the compression ratio presents itself as a key parameter that can help to increase the COP if maintained at low values. The results of this research could be applied to the design of a control methodology for monovalent heat pumps. (C) 2012 Elsevier Ltd. All rights reserved.

Heat transfer of a horizontal spiral heat exchanger under groundwater advection
Huai Li, Katsunori Nagano, Yuanxiang Lai
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 55, 23-24, 6819, 6831, PERGAMON-ELSEVIER SCIENCE LTD, Nov. 2012, [Peer-reviewed]
English, Scientific journal, Groundwater flows at approximately 1-3 m under the ground surface in a given region. If groundwater flow is present, the performance of a horizontal ground heat exchanger (HGHE), buried in a shallow trench, is enhanced. Nevertheless, owing to the general depth at which groundwater is present, research regarding the heat transfer of a ground heat exchanger (GHE) under conditions with groundwater flow has mainly focused on vertical GHE systems. To the authors' knowledge, no such studies have addressed HGHEs. From a system design perspective, a prediction tool is needed to consider the groundwater flow, optimize the size of the horizontal heat exchanger, minimize the initial cost and maximize the operational efficiency. Therefore, in this study, a moving ring source model was established and solved analytically to describe the temperature response of a spiral heat exchanger with groundwater flow. In addition, experiments were carried out to study the soil temperature variation during the operation of a spiral heater with different water velocities. The validity of the proposed model was proven by the good agreement between the experimental and calculated results. The average virtual tube surface temperature variations of single ring sources in two different configurations are discussed. Furthermore, the average virtual tube surface temperatures of multiple ring sources extending from single arrangements were computed and approximation algorithms were introduced to reduce the calculation time. The approximation approach has been proven to run thousands of times faster than the initial method, and the calculation results are in 97% agreement with those of the initial method. In summary, this study provides a useful tool for the design of spiral heat exchangers. (C) 2012 Elsevier Ltd. All rights reserved.

Steady state vapor compression refrigeration cycle simulation for a monovalent inverter-driven water-to-water heat pump with a desuperheater for low energy houses
David L. Blanco, Katsunori Nagano, Masahiro Morimoto
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 35, 7, 1833, 1847, ELSEVIER SCI LTD, Nov. 2012, [Peer-reviewed]
English, Scientific journal, A steady-state simulation is presented for a monovalent inverter-driven water-to-water heat pump with a desuperheater. For design-oriented simulations, superheating or sub-cooling degrees are used as input. However, the proposed simulation only uses the system's refrigerant charge, environmental, and control parameters, which make it particularly useful for off-design evaluations, including the annual performance factor calculation. Block models were used for the compressor and electronic expansion valve, while novel adaptive zone models were used for the heat exchangers. A multivariable error minimization algorithm was used over a sequential component scheme to provide global convergence. The numerical calculations were compared with 118 experimental results. The resulting COP agrees within 10% for 95.77% of the data. The mapping results reveal a maximum COP deviation of 8.78%. Computational results for the studied system reveal that a constant degree of superheating might not always maximize the COP. (C) 2012 Elsevier Ltd and IIR. All rights reserved.

Effect of ground conditions and vertical distribution of air/globe temperatures on the stress of hot outdoor environments
Kuwabara Kouhei, Yachi Makoto, Kubota Hideki, Hamada Yasuhiro, Nakamura Makoto, Nagano Katsunori
Proceedings of the ... Symposium on Human-Environment System, 36, 269, 272, Japanese Society of Human-Environment System, Nov. 2012, [Peer-reviewed]
Japanese, Black white globe and air temperatures tgl.b tgl.w ta were measured at the following places i) roof ii)grass and iii)street Environmental globe temperature tgle which is a globe temperature with the effect of long wave radiation excluding the effect of solar radiation was calculated from tgl.b and tgl.w The effect of long wave radiation on tgle was expressed as △trl(=tgle-ta)and the value of △trl at the grass was identified being smaller than that at the roof and street The mean skin temperatures of subjects at these places were predicted by applying the solar operative temperature top.sun a operative temperature with the effect of solar radiation including △trl

Planning of an environment conscious school that mimics the function of a big tree - Application of biomimicry in building planning
Hisashi Wakayama, Takao Katsura, Yuji Ryu, Katsunori Nagano
AIJ Journal of Technology and Design, 18, 40, 999, 1002, Oct. 2012, [Peer-reviewed]
Japanese, Scientific journal, This paper introduces an overview of Ohori high school building built on Mar. 2010. This building was designed as an environmental conscious school that mimics the functions of a big tree. Leaf transpiration for roof top water spray, absorbing heat from roots for the Ground Source Heat Pump system, and rain water retaining for rain water storage, etc. This paper shows the planning concept and design features of the environmental conscious building introducing the concept of biomimicry.

A new model and solutions for a spiral heat exchanger and its experimental validation
Huai Li, Katsunori Nagano, Yuanxiang Lai
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 55, 15-16, 4404, 4414, PERGAMON-ELSEVIER SCIENCE LTD, Jul. 2012, [Peer-reviewed]
English, Scientific journal, A spiral heat exchanger was applied in a ground source heat pump (GSHP) system that is primarily used for residential indoor heating. Studies that have been performed on the heat transfer of spiral heat exchanger have focused on field measurements and numerical analysis; however, theoretical research on the subject is absent in the literature. In this study, a methodology is proposed to analyze the heat performance of a spiral heat exchanger. A ring source model was established and solved analytically to describe the temperature variation of the ground caused by a spiral heat exchanger. The validity of the model was examined by an experiment on the soil temperature variation with a spiral heater. The virtual ring tube surface temperature response of unit ring circle was calculated by a superposition of the contributions of the ring source itself and adjacent ring sources. Furthermore, a fast algorithm was created to compute the average tube surface temperature resulting from the dimensionless temperature rise at a point far from the ring source that is constant when the non-dimensional distance is less than 0.13. The author confirmed that the calculation time of this proposed algorithm decreased by a factor of 100 compared with the traditional integration method. A system designer will find this algorithm helpful when determining the size of a heat exchanger under a required heating load, particularly for different arrangement of spiral heat exchangers. (C) 2012 Elsevier Ltd. All rights reserved.

Evaluation of the Tolerance of Construction and Equipment Materials to Ozone Gas Exposure in the Ozone Gas Sterilization of Cleanrooms
IWAMURA TAKUJI, NAGANO KATSUNORI, WAKAYAMA YOSHIHIDE, KOSAKA NORIYOSHI, NOGAMI TOSHIHIRO, SHINTANI HIDEHARU, KATO MIYOSHI
防菌防ばい, 40, 6, 333, 340, 日本防菌防黴学会, Jun. 2012, [Peer-reviewed]
Japanese

Development of Desiccant System using Wakkanai Siliceous Shale-4th Report: Optimization of the Operational Conditions for the Desiccant System-
NABESHIMA YUKI, NAGANO KATSUNORI, NAKAMURA MAKOTO, TOGAWA JUN'YA
日本冷凍空調学会論文集, 29, 1, 171, 178, Japan Society of Refrigerating and Air Conditioning Engineers, Mar. 2012, [Peer-reviewed]
Japanese, The objective of this study is to develop a desiccant system using Wakkanai siliceous shale (WSS). This article is the 4^th report of the series. Two honeycombed desiccant rotors containing WSS powder with chlorides impregnated was made and evaluated. These rotors were applied into the test desiccant apparatus. It has an additional sensible heat exchange rotor (SHE). To regenerate the first rotor, hot water at 40 ℃ was supplied to HEX. In addition, cold water at 23 ℃ was provided to HEX for pre-cooling the second rotor. The amount of dehumidification was 5.7 g/kg_DA at 1-1 rpm operation, and the condition of air temperature and humidity of the outside and room were 30 ℃, 75 %RH and 26 ℃ and 60 %RH respectively. (1-1 rpm: rotating speed of the first - second rotors) Though the amount of dehumidification didnt increase according to equipping a SHE rotor, we found that it was effective to reduce a used thermal energy for pre-cooling. As the result, the maximum dehumidification of 6.5 g/kg_DA was obtained at 1-4rpm of first and second rotors with additional pre-cooling for outside air. This was 86 %RH of the latent cooling load between OA and RA.

Development of Desiccant System using Wakkanai Siliceous Shale-3rd Report: Evaluation of the Dehumidification Performance of Desiccant Rotor-
TOGAWA JUN'YA, NABESHIMA YUKI, NAGANO KATSUNORI
日本冷凍空調学会論文集, 29, 1, 163, 170, Japan Society of Refrigerating and Air Conditioning Engineers, Mar. 2012, [Peer-reviewed]
Japanese, This article is the 3^rd report of the series. The objective of this study is to evaluate the dehumidification amount of newly developed desiccant rotors by using paper containing Wakkanai siliceous shale (WSS) which is a natural mesoporous material in Hokkaido. The dehumidification amounts were evaluated at the following air conditions (OA: 30 ºC, 75 %RH, RA: 40 ºC, 27.3 %RH). The WSS rotor and a B type silica gel rotor (400 mm of the rotor diameter and 200 cpsi of the rotor cell numbers) showed same values of 3.1 and 3.2 g/kg_DA at 1 rpm of rotation speed, even though the maximum water adsorption amount of the B-type silica gel is three times higher than that of the WSS. To enhance the dehumidification ability of the WSS rotor, an impregnation of NaCl and MgCl₂ into the WSS paper was carried out, and it gave more than 3.8 g/kg_DA. In addition, for the development of the compact desiccant system, dependency of the rotor rotation speed, the size of the rotor diameter, and a rotor cells number were examined. Finally, 4.7 g/kg_DA was obtained at 500 mm diameter and 270 cpsi of the rotor cell numbers.

Development of Desiccant System using Wakkanai Siliceous Shale-5th Report: Examination for the Form of Desiccant Rotor-
NABESHIMA YUKI, NAGANO KATSUNORI, TOGAWA JUN'YA
日本冷凍空調学会論文集, 29, 1, 179, 186, Japan Society of Refrigerating and Air Conditioning Engineers, Mar. 2012, [Peer-reviewed]
Japanese, The objective of this study is to develop a desiccant system using Wakkanai Siliceous Shale (WSS). This article is the 5^th report of the series. In the first part of this paper, various parameters of the WSS rotor were estimated by the numerical calculation to find the higher dehumidification amount. An optimal rotor configuration was selected as 500 mmφ of the rotor diameter, 60 mm of the rotor thickness and 270 cpsi of the rotor cell number. In the second part, as a calculation model for the desiccant ventilation, an appropriate system, which consists of two rotors with two heat exchangers for pre-cooling and two heat exchangers for regeneration, was applied. To get over the target value of the dehumidification amount (7.6 g/kg_DA), the numerical simulation was carried out based on the desiccant ventilation model. As a result, the maximum dehumidification amount of 8.6 g/kg_DA was obtained at 0.5 rpm of each rotor rotating speed.

Development of Desiccant System using Wakkanai Siliceous Shale-6th Report: Study of System Requirement for Dehumidification Air Conditioner-
FUKUSHIMA HIROKI, NAGANO KATSUNORI, NABESHIMA YUKI, NAKAMURA MAKOTO, TOGAWA JUN'YA
日本冷凍空調学会論文集, 29, 1, 187, 194, Japan Society of Refrigerating and Air Conditioning Engineers, Mar. 2012, [Peer-reviewed]
Japanese, This study aims to develop and evaluate a desiccant ventilation system using desiccant rotors of the Wakkanai siliceous shale (WSS). The desiccant apparatus consists of two WSS rotors, two heat exchangers for regeneration and two heat exchangers for pre-cooling. The target for the system is to remove all of latent heat load from outside air (7.6 g/kg_DA) without condensing. In the experiments, when 40 ℃ water supplied to one of the heat exchanger for regeneration, condensation was inevitable in heat exchangers for pre-cooling. The condition to dehumidify 7.6 g/kg_DA without condensation was to run two rotors at 0.5 rpm and to supply 21.5 ℃ water to heat exchangers for pre-cooling and 45 ℃ water to another two for regeneration. Under the condition, enthalpy needed to dehumidify was reduced by 18 % compared to conventional dehumidification.

Improvement of water vapor adsorption ability of natural mesoporous material by impregnating with chloride salts for development of a new desiccant filter
Saya Nakabayashi, Katsunori Nagano, Makoto Nakamura, Junya Togawa, Asami Kurokawa
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, 17, 4, 675, 686, SPRINGER, Aug. 2011, [Peer-reviewed]
English, Scientific journal, The aim of this study is the development of a new adsorbent for the desiccant material which can be regenerated by the domestic exhaust heat by using natural mesoporous material, Wakkanai siliceous shale. To improve this shale's performance to adsorb/desorb the water vapor, lithium chloride, calcium chloride or sodium chloride was supported into the mesopores by impregnating with each chloride solution. Especially sodium chloride was effective to increase the water vapor adsorption amount 5-7 times of that of natural shale in the relative humidity range from 50 to 70%. Moreover, the appropriate impregnating concentrations were determined as 5wt% from the relationship between the maximum water vapor adsorption amount and the mesopore volume. Based on these results, a new desiccant filter has been developed by impregnated original paper with lithium chloride and sodium chloride. This paper contained shale powder in the synthetic fibers. The dehumidification performance of this filter was evaluated under the simulated summer condition in Tokyo. From the cyclic adsorption/regeneration test, this shale and chlorides filter could adsorb and desorb 60 g/h water vapor repeatedly at the regeneration temperature of 40A degrees C. On the other hand, a silica gel filter and a zeolite filter adsorbed and desorbed only 10 g/h and 25 g/h, respectively. These results suggested that the shale impregnated with the chlorides has the best dehumidification ability as a new desiccant material. Further, the desiccant filter made from the shale will achieve the effective use of the low temperature exhaust heat.

Effect of the wetness of clothing made of different materials on the mean skin temperature in a hot environment　　　　　　　　　　　　　　　
KUWABARA Kouhei, KUBOTA Hideki, HAMADA Yasuhiro, NAGANO Katsunori
Book of Abstracts of 14th International Conference on Environmental Ergonomics, 293, 296, Jul. 2011, [Peer-reviewed]
English, International conference proceedings

Development of ground source heat pump units that is capable of air-conditioners and hot water supply in residential house
Yasuyuki Ito, Katsunori Nagano
AIJ Journal of Technology and Design, 17, 36, 593, 596, 日本建築学会, Jun. 2011, [Peer-reviewed]
Japanese, Scientific journal, We developed ground source heat pump unit that was capable of air-conditioners and hot water supply. This equipment utilized artificial waste heat generated by air-conditioners as the heat source for hot water supply. By carrying out a simulation, it was found that the air-conditioning system had high performance. As result, this system could reduce CO2 emissions.

A study on design method for the ground heat exchanger's specification of ground source heat pump system
Takao Katsura, Katsunori Nagano, Yasushi Nakamura
Journal of Environmental Engineering, 76, 659, 59, 66, 日本建築学会, 2011, [Peer-reviewed]
Japanese, Scientific journal, In this paper, the authors define the heat extraction or injection rate of ground heat exchanger (GHEX) per length and temperature difference as the coefficient of heat extraction or injection. Applying the definition, the heat extraction or injection performances of GHEXs are quantified corresponding to the conditions such as ground properties and GHEXs' specifications are changed.In addition, the authors compared to the quantified heat extraction or injection performances. When the flow condition of heat transfer medium in GHEX turns from laminar flow to turbulent flow, the heat extraction or injection performances of GHEXs increase 5~12%. On the other hand, the increase of heat extraction or injection performances of GHEXs in the range of turbulent flow is only less than 2% even in the where the flow rate is up to more than thrice. When the number of U-tubes is two and flow rate per the one U-tube is set at 6 L/min, the ratios of heat extraction performance of GHEXs using pre-casting concrete pile and steel pile compared to the borehole GHEX are 1.35∼ 1.58 and 1.29∼1.40, respectively.

The Evaluation of the Moisture Sorption Mechanism of Chloride-Impregnated Wakkanai Siliceous Shale
Asami Kurokawa, Junya Togawa, Yuki Nabeshima, Katsunori Nagano
KAGAKU KOGAKU RONBUNSHU, 37, 5, 394, 399, SOC CHEMICAL ENG JAPAN, 2011, [Peer-reviewed]
Japanese, Scientific journal, Wakkanai siliceous shale (WSS) is a natural mesoporous material that has high performance of moisture adsorption/desorption in response to relative humidity. The authors have previously applied the technique of impregnation with chloride to enhance the water adsorption performance; and in the present study the moisture sorption mechanism with chloride impregnation was examined by DSC analysis. It was found that the adsorbed water in the pores was divided present in three forms: non-freezing water, freezable bound water and free water. The free water peak was not observed at water content below 320 mg/g. This water content was also consistent with the maximum amount of water adsorbed without surface wetting, which was estimated from color change of WSS surface at various water contents. In addition, from the measurement by a modified nitrogen adsorption method, it was visually shown that the mechanism of moisture sorption gradually proceeded from the smaller mesopores. Moreover, the NaCl impregnation was applied to other porous materials. From the experimental results, the impregnation of silica gel with NaCl is not effective, because of the structural weakness. Therefore the stability of the material to impregnation is an important factor.

The New Measurement Method of the Adsorbed Moisture Distribution in the Porous Materials
Asami Kurokawa, Junya Togawa, Yuki Nabeshima, Katsunori Nagano
KAGAKU KOGAKU RONBUNSHU, 37, 6, 506, 511, SOC CHEMICAL ENG JAPAN, 2011, [Peer-reviewed]
Japanese, Scientific journal, Moisture absorption by porous materials with mesopores and micropores is generally evaluated by measurement of the water adsorption isotherm and analysis of the pore distribution by the nitrogen adsorption method using completely dry samples. In practical use, however, the adsorbent contains some water depending on the environmental conditions. To evaluate the pore distribution accompanied by the water adsorption, the nitrogen adsorption method was modified by using a frozen sample, which was dipped into liquid nitrogen after the water adsorption had reached equilibrium. Water adsorption was found to proceed from the smaller to the larger pores as relative humidity increased. The pore distribution at the relative humidity above which pores were completely occupied by absorbed water was shown visually on a histogram.

Development of dehumidification filter using natural mesoporous material
Saya Nakabayashi, Katsunori Nagano, Makoto Nakamura
AIJ Journal of Technology and Design, 16, 34, 1023, 1026, 日本建築学会, Oct. 2010, [Peer-reviewed]
Japanese, Scientific journal, A new dehumidification filter using natural mesoporous material, Wakkanai siliceous shale, was developed for effective treatment of the latent heat load. The dehumidification ability of the developed filter was evaluated. It was demonstrated that this filter performed as an air-toair heat exchanger under high rotating speed. The total heat exchange efficiency was 80% at 22 rpm. This filter removed 3.3 g/kg DA of water vapor at 1 rpm when the regeneration temperature was 40°c. Moreover the rate of energy reduction to remove outdoor air load was estimated to be 56% by a combination of this filter and a sensible heat exchanger.

Study on Effective Thermal Conductivity of Hydrogen Absorbing Alloys Bed for Passive Type Hydrogen Absorption and Desorption Systems
SHIRATO Hiroyasu, HAMADA Yasuhiro, SUDA Takanori, OKA Yoshiaki, NAGANO Katsunori
Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers, 27, 2, 67, 74, Japan Society of Refrigerating and Air Conditioning Engineers, Jun. 2010, [Peer-reviewed]
Japanese,   This paper indicates the effective thermal conductivity of the hydrogen absorbing alloys bed of the passive type hydrogen storing systems for residential energy systems or stand-alone power supplies by experimental measurement.
  The effective thermal conductivity of the alloys bed depended on the cylinder pressure and the H/M composition of the alloys. Moreover, the conductivity was linear to the H/M composition at Plateau area.
  The introduction of 15 mass% Cu wires to the bed for improving the heat transfer was effective to raise the effective thermal conductivity of the bed. 50% of void fraction of the bed was also useful. The use of MmNi₅ resulted in raising the effective thermal conductivity compared to the use of MmNi_4.50Co_0.10Al_0.15Mn_0.25 at the same H/M composition and the void fraction.

A study on the energy evaluation of the building thermal mass storage system with the chilled water storage system
Takuji Nakamura, Katsunori Nagano, Sayaka Kindaichi
Journal of Environmental Engineering, 75, 649, 289, 295, 日本建築学会, Mar. 2010, [Peer-reviewed]
Japanese, Scientific journal, In this paper the energy characteristics of the building thermal mass storage system with the chilled water storage system is evaluated. A typical commercial building model is simulated by a computer and the influence of the regions, the daily weather and the heat load in the room is examined. The results show that the increase rate of the cooling load and the electricity consumption is high in the months of the low cooling load comparing with the non-storage case. And the building thermal mass storage system with the water storage reduces the primal energy consumption by 2.7% and the exhaust carbon dioxide by 10.4% in the optimized case in Tokyo.

Estimation of Appropriate Concentration of Impregnated Chloride Solution for Wakkanai Siliceous Shale from Surface Wettedness Evaluation and the Relationship between Maximum Moisture Sorption and Pore Volume
Saya Nakabayashi, Katsunori Nagano, Junya Togawa, Makoto Nakamura, Asami Kurokawa
KAGAKU KOGAKU RONBUNSHU, 36, 5, 480, 485, SOC CHEMICAL ENG JAPAN, 2010, [Peer-reviewed]
Japanese, Scientific journal, Wakkanai siliceous shale, a natural mesoporous material, is impregnated with lithium chloride, calcium chloride and sodium chloride solutions to improve its moisture adsorption capacity. However, excess impregnation leads to elution of sorbed moisture from pores to the surface under humid conditions, and the surface of the sample becomes wet. To determine appropriate concentrations of impregnating chlorides, the surface wettedness of the chloride-impregnated shale was estimated from the surface color changes of samples exposed to 75% RH air by using a digital scanner. The appropriate concentrations of lithium chloride and calcium chloride for the shale were 4 and 5 wt%, respectively. Moreover, the maximum moisture sorption of the shale impregnated with the appropriate chloride concentration agreed with the moisture retention predicted from the mesopore volume. This indicates that, in order to avoid elution of the chloride solution to the surface, the maximum moisture sorption of the chloride-impregnated shale should be smaller than the mesopore volume.

Development of Desiccant System using Wakkanai Siliceous Shale-1st Report: Development and Evaluation of a Paper-Base for the Desiccant Rotor-
TOGAWA JUN'YA, KUROKAWA ASAMI, NAKABAYASHI SAYA, NAGANO KATSUNORI, YOSHIDA SHIGEO
日本冷凍空調学会論文集, 26, 4, 543, 550, 日本冷凍空調学会, Dec. 2009, [Peer-reviewed]
Japanese

Development of Desiccant System using Wakkanai Siliceous Shale-2nd Report: Development, Evaluation and Numerical Simulation of Rotor-
NAKABAYASHI SAYA, NAGANO KATSUNORI, NAKAMURA MAKOTO, TOGAWA JUN'YA, KUROKAWA ASAMI
日本冷凍空調学会論文集, 26, 4, 551, 558, Dec. 2009, [Peer-reviewed]
Japanese

Evaluation of the Water Adsorption Performance of Wakkanai Siliceous Shale Supported by Chlorides
Saya Nakabayashi, Katsunori Nagano, Makoto Nakamura, Junya Togawa, Asami Kurokawa
KAGAKU KOGAKU RONBUNSHU, 35, 6, 602, 607, SOC CHEMICAL ENG JAPAN, Nov. 2009, [Peer-reviewed]
Japanese, Scientific journal, Wakkanai siliceous shale (WSS) is a natural meso-porous material. This study aimed to improve its capacity to adsorb humidity. The shale's surface was supported by chlorides by being dried at 150 degrees C after impregnation with a chloride solution. The change in specific surface area, pore size distribution and the water sorption/desorption isotherm of the supported shales were investigated. From the water sorption isotherms, the amount of water sorption of WSS supported by LiCl 10% solution increased to 150 mg/g, while that of the natural WSS was 25 mg/g in the range of relative humidity from 30 to 60%. Similarly, WSS supported by NaCl adsorbed water about 7 times more water than natural WSS did. It was suggested that this improvement resulted from water transport into NaCl caused by capillary condensation of water in the WSS pores.

Study of the most suitable operation of ground source heat pump system for totally electrified heating and cooling system : - A practical example in a hospital -
Hisashi Wakayama, Katsunori Nagano, Sayaka Kindaichi
AIJ Journal of Technology and Design, 15, 31, 823, 826, Oct. 2009, [Peer-reviewed]
Japanese, Scientific journal, This paper indicates a heat source system which is installed in a totally electrified hospital built in April 2008. The heat source system consists of a high efficient screw type heat pump chiller with ice storage and another module type air cooled heat pumps. A ground source heat pump system is also introduced by using the foundation piles as ground heat exchangers. In this paper, seasonal and daily operation modes of the system are investigated. Measures for high efficient operation and energy saving in the whole system are finally proposed.

Calculation algorithm of the temperatures for pipe arrangement of multiple ground heat exchangers
Takao Katsura, Katsunori Nagano, Shigeaki Narita, Sayaka Takeda, Yasushi Nakamura, Atsushi Okamoto
APPLIED THERMAL ENGINEERING, 29, 5-6, 906, 919, PERGAMON-ELSEVIER SCIENCE LTD, Apr. 2009, [Peer-reviewed]
English, Scientific journal, The authors introduce calculation algorithm of the temperatures of the ground and heat carrier fluid in multiple ground heat exchangers for pipe arrangement of ground source heat pump (GSHP) systems. First, the outline is explained. Next, in order to investigate possibility for the operation of the GSHP system with steel foundation piles and validate reproducibility of the value calculated by the design tool including the calculation algorithm, field tests of heating and heat extraction were conducted with a residential GSHP system using 25 steel foundation piles of 8 m long as ground heat exchangers. From a result of comparison between temperatures of the measurement in the test and calculation by using the design tool, it was confirmed that the tool could predict the temperatures with acceptable precision and speed for utilizing as a design tool. In addition, performance of GSHP systems with steel foundation piles in long term is predicted with the design tool. In moderate climate region, since the GSHP systems using multiple ground heat exchangers with short length can operate with high efficiency as well as the GSHP system using a single ground heat exchanger with long length, the GSHP systems with steel foundation piles have possibility to become popular. (C) 2008 Elsevier Ltd, All rights reserved.

Experimental study of the performance of porous materials to moderate the roof surface temperature by its evaporative cooling effect
Surakha Wanphen, Katsunori Nagano
BUILDING AND ENVIRONMENT, 44, 2, 338, 351, PERGAMON-ELSEVIER SCIENCE LTD, Feb. 2009, [Peer-reviewed]
English, Scientific journal, The change of urban surfaces from permeable to impermeable materials, i.e. asphalt or concrete, has caused the rising of surface temperatures, particularly in densely developed cities. The consequences of this problem lead to higher energy consumption, especially for cooling purposes and other environment related issues. This paper aims to investigate the performance of several non-porous and porous potential roofing materials, to determine which ones might best be used to create a more effective system by utilizing their moisture absorption and evaporation capabilities. Here, four kinds of materials-pebbles, silica sand, volcanic ash, and siliceous shale-were tested to evaluate their moisture and thermal performance, including the effects from different particle sizes. First, the necessary physical properties and pore characteristics were obtained. Thus, each material, under simple boundary conditions, was evaluated in an evaporation experiment, to determine comparative moisture and thermal behavior. Next, cyclic experimentation was conducted, in which variations of temperature, relative humidity and simulated solar radiation were included. The measurement results showed that porous materials can satisfactorily lower surface temperature. Among the tested samples, siliceous shale of both small and large particle diameter was found to lower the daily average surface temperature by up to 6.8 and 8.6 degrees C, respectively. The better performance of large size particles could possibly be caused by the ventilation occurring within the material layers and high solar penetration through the large gaps between particles, which would release more latent heat when compared to materials of smaller particle size. Finally, analysis of surface energy balance suggested that water contents, solar absorptivity, and wind effects all have significant influences on cooling the surface temperature. (C) 2008 Elsevier Ltd. All rights reserved.

An experimental study on thermal capacity of charge and discharge to building conpornents in thermal mass storage system
Takuji Nakamura, Minoru Kawashima, Katsunori Nagano
AIJ Journal of Technology and Design, 15, 29, 173, 178, Feb. 2009, [Peer-reviewed]
Japanese, Scientific journal, A series of experiment for building thermal mass storage system was carried out using the real-scale experiment unit which can reproduce the real condition. The experimental condition varies direction of blowing, flow rate, installation density of diffuser and flow temperature in order to clarify their characteristics of charging and discharging thermal storage into the slab. The result shows that the rate of charge to the building materials including slab is between 70% from 80%. And uniformity of supply air blowing is effective for charging to the slab.

6-4-4 Development of Compact-sized Desiccant System using Low Temperature Exhaust Heat with Wakkanai Siliceous Shale
NAKABAYASHI Saya, NAGANO Katsunori, NAKAMURA Makoto, TOGAWA Junya, KUROKAWA Asami, YOSHIDA Shigeo, NIKI Kosuke, OKAMOTO Atsushi
Proceedings of the Annual Conference of The Japan Institute of Energy, 18, 360, 361, The Japan Institute of Energy, 2009
Japanese, This study aims at the development of the heat pump system in a small size for effective cooling, heating, and hot water supply combined with the desiccant ventilation system using a natural porous material of Wakkanai siliceous shale. The new desiccant material using a natural porous material could be regenerated with the exhaust heat from the heat pump.

Development of Desiccant System using Wakkanai Siliceous Shale-1st Report: Development and Evaluation of a Paper-Base for the Desiccant Rotor-:1st Report: Development and Evaluation of a Paper-Base for the Desiccant Rotor
TOGAWA Junya, KUROKAWA Asami, NAKABAYASHI Saya, NAGANO Katsunori, YOSHIDA Shigeo
Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers, 26, 4, 543, 550, Japan Society of Refrigerating and Air Conditioning Engineers, 2009, [Peer-reviewed]
Japanese

Development of Desiccant System using Wakkanai Siliceous Shale-2nd Report: Development, Evaluation and Numerical Simulation of Rotor-:2nd Report: Development, Evaluation and Numerical Simulation of Rotor
NAKABAYASHI Saya, NAGANO Katsunori, NAKAMURA Makoto, TOGAWA Junya, KUROKAWA Asami
Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers, 26, 4, 551, 558, Japan Society of Refrigerating and Air Conditioning Engineers, 2009, [Peer-reviewed]
Japanese, The aim of this study is to develop a desiccant system using Wakkanai siliceous shale. A honeycombed desiccant rotor containing this shale's powder and chlorides was made and evaluated. However a specific surface area and a pore volume were smaller than a silica-gel rotor or a zeolite rotor, the maximum amount of water adsorption was twice as other rotors. We have verified the function of this desiccant rotor concerning adsorption and desorption of moisture from the draft experiments. The rotor containing the shale could adsorb moisture stably in the cyclic test, and be regenerated by 40°C air under this experimental condition. This means that the exhaust heat from the heat pump can be used for regenerating rotor. Furthermore, the numerical simulation was carried out on the assumption that this rotor was used for a dehumidification for the residential air conditioning in Tokyo. This rotor could adsorb 37.1% moisture of the required dehumidification amount for the hottest day in 2008. When we employed a pre-cooling before dehumidification, the amount of adsorption increased to 66.2%.

Method of calculation of the ground temperature for multiple ground heat exchangers
Takao Katsura, Katsunori Nagano, Sayaka Takeda
APPLIED THERMAL ENGINEERING, 28, 14-15, 1995, 2004, PERGAMON-ELSEVIER SCIENCE LTD, Oct. 2008, [Peer-reviewed]
English, Scientific journal, In this paper, the authors propose a method of calculation of the ground temperature for heat extraction or injection via multiple ground heat exchangers. First, a high-speed algorithm to calculate the ground temperature is described. Next, a variation of the ground temperature calculated by using this method is compared with the one obtained by applying spatial superposition principle of the temperature responses calculated by the theoretical equations. As a result, the method's preciseness was proved and the computation time was about 1/135 compared to the method with the theoretical solution. From these, it was shown that the method has appropriate precision and computational speed to use as a design tool. Additionally, if the ground heat exchangers are short such as when foundation piles of a building are used as ground heat exchangers, it is necessary to consider the heat transfer from the edge of the ground heat exchangers. Thus we devised a method, which uses the equivalent radius obtained by multiplying the ideal ground heat exchanger radius by a modification coefficient, to obtain the average surface temperature of the ground heat exchangers influenced by the heat transfer. The temperature calculated with the modification coefficient was compared to the one calculated without the modification coefficient. (C) 2007 Elsevier Ltd. All rights reserved.

F-32 Model of Predicting Body Temperatures for Protecting Heat Disorder in Hot Environment -Part VII
AMEMIYA Satoshi, KUWABARA Kouhei, KUBOTA Hideki, HAMADA Yasuhiro, NAKAMURA Makoto, NAGANO Katsunori, IKEDA Kouki
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 20, 2, 1181, 1184, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 08 Aug. 2008
Japanese, We propose a new model for predicting heart rate and core temperature in hot environment considering individual cardiorespiratory capacity by applying our human model for predicting mean skin temperature. Core temperature as well as heart rate is defined as the function of exercise intensity and thermal stress expressed by deviation of mean skin temperature from that of thermal neutrality. Core temperature and heart rate begin to increase at a critical mean skin temperature; we have identified these critical values by using data from our experiments and literatures.

An experimental study on thermal characteristics of heating/cooling system with building thermal mass storage
Takuji Nakamura, Katsunori Nagano
Journal of Environmental Engineering, 73, 627, 639, 645, 一般社団法人日本建築学会, May 2008, [Peer-reviewed]
Japanese, Scientific journal, The real-scale experimental unit of HVAC system using building thermal mass storage for a commercial building was constructed and a series of experiment was carried out. The experimental condition varies direction of blowing, flow rate and density of diffuser in order to clarify their influence to the amount of charging energy into the slab. And the thermal storage capacity was analyzed making unit by differential of initial concrete slab temperature and blowing temperature. The result shows that the unit thermal storage capacity was proper, and the unit thermal storage capacity of horizontal blowing is larger than from 1.4 times to 1.9 times as vertical blowing.

Study on Evaluation of Present Performance and Future of Residential Cogeneration Systems in Cold Region
HAMADA YASUHIRO, TAGOMORI HIDETOSHI, NAGANO KATSUNORI, GOTO RYUICHIRO, NAKAMURA MITSURU
太陽エネルギー, 34, 3, 51, 58, May 2008, [Peer-reviewed]
Japanese

Field Experiment on Heat Extraction or Injection from the Ground Affected by Ground Water Flow
KATSURA Takao, NAGANO Katsunori, TAKEDA Sayaka, NAKAMURA Yasushi
Transactions of the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan, 32, 127, 1, 9, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Oct. 2007, [Peer-reviewed]
Japanese, A steel tank which is 2.0m by 4.5m by 3.0m is installed under the ground in order to investigate increase of heat extraction or heat injection by ground water flow in the ground thermal energy system (GTES). First, the authors define unit heat transfer rate, which can clarify relative merit of heat extraction or injection performance. Next, it was confirmed that the unit heat extraction rate increases according to the ground water velocity even in the case where the ground water velocity is relatively small (100〜350m/year). When the ground water velocity is 1400m/year, unit heat transfer rate with a double pipe ground heat exchanger is 16.12W/m/K and more than three times larger than the one with a single U-tube ground heat exchanger. The result shows that using a ground heat exchanger with small internal thermal resistance is effective to increase the heat extraction from the ground. In addition, from the result that the unit heat transfer rate of measuring was larger than the one calculated with considering only forced convection, it was indicated that the free convection is generated in the sand layer. Thus the authors investigated about the effect of the mixed convection.

Exergoeconomic Evaluation of Low Energy Houses Equipped with Electric Generation Systems (Part 1)-Calculation Method of Exergy Load and Specific Exergy Cost-
OTA ISAMU, NAGANO KATSUNORI
太陽エネルギー, 33, 5, 51, 59, 日本太陽エネルギー学会, Sep. 2007, [Peer-reviewed]
Japanese

Exergoeconomic Evaluation of Low Energy Houses Equipped with Electric Generation Systems (Part 2)-Exergoeconomic Evaluation of a model case-
OTA ISAMU, NAGANO KATSUNORI
太陽エネルギー, 33, 5, 61, 67, Sep. 2007, [Peer-reviewed]
Japanese

F-39 Model of Predicting Body Temperatures for Protecting Heat Disorder in Hot Environment-Part V
KUWABARA Kouhei, NAKAYA Noritaka, KUBOTA Hideki, HAMADA Yasuhiro, NAKAMURA Makoto, AMEMIYA Satoshi, NAGANO Katsunori
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 19, 2, 1287, 1290, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 24 Aug. 2007
Japanese, The aim of this research is to protect workers and exercising people from heat disorders by predicting body temperatures (both core and mean skin temperature) and sweating rate of human. In this paper, we have proposed a method for predicting "solar operative temperature" with black and white globe thermometers, and measured solar absorptance of white globe. The predicted mean skin temperature applied solar operative temperature which was obtained with globe temperatures has agreed well with those obtained from human experiments conducted outdoors.

Study of a floor supply air conditioning system using granular phase change material to augment building mass thermal storage - Heat response in small scale experiments
K Nagano, S Takeda, T Mochida, K Shimakura, T Nakamura
ENERGY AND BUILDINGS, 38, 5, 436, 446, ELSEVIER SCIENCE SA, May 2006, [Peer-reviewed]
English, Scientific journal, We have proposed a new floor supply air conditioning system, using phase change material to augment building mass thermal storage. A scale model was constructed for such a system. Granules containing phase change material (PCM), with a phase change temperature of about 20 degrees C, were made from foamed glass beads and paraffin waxes. Results from measurements simulating an air conditioning schedule in office buildings indicate that 89% of daily cooling load could be stored each night in a system that used a 30 mm thick packed bed of the granular PCM. (c) 2005 Elsevier B.V. All rights reserved.

Environmental Evaluation of Low Energy House with its Roof Totally Covered by Photo Voltaic Modules
OTA ISAMU, NAGANO KATSUNORI
太陽エネルギー, 32, 2, 53, 61, 日本太陽エネルギー学会, 31 Mar. 2006, [Peer-reviewed]
Japanese

Characteristics and consideration of required sweat rate standard of the previous ISO 7933
T. Sakoi, T. Mochida, K.Nagano, K. Shimakura
Journal of the Human-Environment System, 9, 1, 19-29, 2006, [Peer-reviewed]

Experiments to determine the convective heat transfer coefficient of a thermal manikin
K Kuwabara, T Mochida, K Nagano, K Shimakura
Environmental Ergonomics, 3, 423, 429, ELSEVIER SCIENCE BV, 2005, [Peer-reviewed]
English, International conference proceedings, In order to determine an equation for calculating the convective heat transfer coefficient in humans, that can be used in an outdoor environment, experiments using a thermal manikin were carried out at an air velocity in the range of 0.7-4.7 m/s. The convective heat transfer coefficient of the naked human body almost agreed with that of the clothed human body with two clothing ensembles. Empirical formulae of the convective heat transfer coefficient for the whole and 10 parts of the body were calculated using experimental data at an air velocity in the range of 0.1-1.0 m/s, which are applicable formulae at an air velocity in the range of 0.1-4.7 m/s. The thermal insulation of the two clothing ensembles decreased with increasing air velocity.

Effective radiant temperature including solar radiation
K Kuwabara, T Mochida, K Nagano, K Shimakura
Environmental Ergonomics, 3, 257, 262, ELSEVIER SCIENCE BV, 2005, [Peer-reviewed]
English, International conference proceedings, An evaluation method for thermal sensations of the human body in an outdoor thermal environment was developed. Effective radiant temperature was proposed as the mean radiant temperature in an outdoor environment. The operative temperature and standard new effective temperature, SET*, in outdoor environments could be calculated using the effective radiant temperature. In order to examine the operative temperature and SET* based on the effective radiant temperature, experiments using subjects were carried out in an outdoor environment at Sapporo city. The SET* calculated from experimental data correlated well with the thermal sensation votes of the subjects. It was shown that a SET* based on the effective radiant temperature can evaluate the thermal sensation of the human body in an outdoor environment.

STUDY ON FLOOR SUPPLY AIR CONDITIONING SYSTEM STORING COLD ENERGY FOR BUILDING STRUCTURE AND GRANULES INCLUDING PHASE CHANGE MATERIAL: Part 3 Utilization of micro-capsule pellet PCM and evaluation of thermal environment
TAKEDA SAYAKA, NAGANO KATSUNORI, MOCHIDA TOORU, NAKAMURA TAKUJI
日本建築学会環境系論文集, 70, 587, 29, 35, Architectural Institute of Japan, Jan. 2005, [Peer-reviewed]
Japanese, Flocculated micro-capsule pellet phase change material (FMC-PCM) which has high latent heat amount is used to the floor supply air conditioning system with thermal energy storage for building structure during night. The load shifting effect can be determined by temperature conditions in the nighttime and daytime. The effect of radiation from the floor face allows the set temperature to be increased to 28℃ by using a FMC-PCM which shows phase change around 20 to 23℃. Thermal sensation indexes indicate the comfortable sensation under a condition with it. The use of the FMC-PCM also effects the improvement of the uncomfortable coldness in the morning in usual systems.

Thermal characteristics of a direct heat exchange system between granules with phase change material and air
K Nagano, S Takeda, T Mochida, K Shimakura
APPLIED THERMAL ENGINEERING, 24, 14-15, 2131, 2144, PERGAMON-ELSEVIER SCIENCE LTD, Oct. 2004, [Peer-reviewed]
English, Scientific journal, The authors have proposed a system of direct heat exchange between granules including phase change material (PCM) and air. The PCM granules consist of granulated porous media with particle diameters of about 1-3 mm and paraffin wax. At first, column experiments are performed with a packed bed of PCM granules. Temperature variations in the PCM packed bed are measured. It is demonstrated that heat exchange flux between the PCM granules and air can be kept large and continuous during phase change. Secondly, a computer simulation model is made using an assumption that the temperature of the PCM granules is the same as that of passing air throughout the packed bed. It is found the phase change period calculated by the model is in agreement with the measured one. Finally, heat transfer coefficient during phase change and the time required for phase change to be completed in the system are discussed by a numerical analysis. (C) 2004 Elsevier Ltd. All rights reserved.

STUDY ON FLOOR SUPPLY AIR CONDITIONING SYSTEM STORING COLD ENERGY FOR BUILDING STRUCTURE AND GRANULES INCLUDING PHASE CHANGE MATERIAL Part 2 Modeling of the system and load shifting effect of air conditioner load
TAKEDA SAYAKA, NAGANO KATSUNORI, MOCHIDA TOORU, NAKAMURA TAKUJI
日本建築学会環境系論文集, 584, 584, 47, 52, Oct. 2004, [Peer-reviewed]
Japanese

Feasibility Study on Aquifer Thermal Energy Storage System by using Digital National Land Information
HAMADA YASUHIRO, NAKAMURA MAKOTO, KUBOTA HIDEKI, MARUTANI KAORU, FUCHIGAMI SHIGEKI, NAGANO KATSUNORI, OCHIFUJI KIYOSHI
太陽エネルギー, 30, 5, 57, 63, 日本太陽エネルギ-学会, Sep. 2004, [Peer-reviewed]
Japanese

On the Health Effect Mechanisms of Radon and its Short-lived Decay Products Part 1 : Radon Exhalation Rate in Sapporo and Simple Model of Respiratory Organ(Proceedings of the 51st Meeting of Japan Society of Physiological Anthropology)
ITO Tomonori, AOKI Tohru, HATAYA Koji, YOKOYAMA Shintaro, SHIMAKURA Kazumi, KURAMAE Masashi, NAGANO Katsunori
Journal of physiological anthropology and applied human science, 23, 5, 182, 182, Japan Society of Physiological Anthropology, Sep. 2004, [Peer-reviewed]
English

Computer Simulation of Whole Body Temperatures and Thermal Sensation and Comfort Votes of Flight Crew(Proceedings of the 51st Meeting of Japan Society of Physiological Anthropology)
BABA Hiroyasu, YAMAMOTO Noriaki, OZAKI Hirokazu, SHIMAKURA Kazumi, KURAMAE Masashi, NAGANO Katsunori, YOKOYAMA Shintaro
Journal of physiological anthropology and applied human science, 23, 5, 182, 182, Japan Society of Physiological Anthropology, Sep. 2004, [Peer-reviewed]
English

STUDY ON FLOOR SUPPLY AIR CONDITIONING SYSTEM STORING COLD ENERGY FOR BUILDING STRUCTURE AND GRANULES INCLUDING PHASE CHANGE MATERIAL Part 1 Construction of a small-scale experimental system and the thermal characteristics
NAGANO KATSUNORI, TAKEDA SAYAKA, MOCHIDA TOORU, SHIMAKURA KAZUMI, NAKAMURA TAKUJI
日本建築学会環境系論文集, 69, 579, 21, 28, Architectural Institute of Japan, 30 May 2004, [Peer-reviewed]
Japanese, A new floor supply air conditioning system, in which thermal capacity is augmented by latent heat storage compared to the general building structure thermal energy storage, is proposed. An experimental apparatus is constructed for the system. Granules including phase change material (PCM), which show phase change around 20℃, are made of foamed glass beads and paraffin waxes. Results from measurements simulated an air conditioning schedule in office buildings indicate that 89% of daily cooling load can be stored in the thermal energy storage period during night under a condition with a 30 mm thick packed bed of the PCM granules.

Experiments on thermal environmental design of ceiling radiant cooling for supine human subjects
K Nagano, T Mochida
BUILDING AND ENVIRONMENT, 39, 3, 267, 275, PERGAMON-ELSEVIER SCIENCE LTD, Mar. 2004, [Peer-reviewed]
English, Scientific journal, This study aims to clarify the control conditions of ceiling radiant cooling systems for human subjects in a supine position. The results will be useful for the design of hospital rooms and bedrooms.
Five subjects cooperated in these experiments. The subject put on bedroom attire typical of hospital patients. In total, 28 experiments were per-formed under various conditions. When SET* and PMV were calculated, mean radiant temperatures evaluated from the radiative heat transfer between the inside surfaces of walls, a floor and a ceiling, and the surfaces of a rectangular model of a human body were applied. As a result, it was clarified that SET* and PMV that gave comfortable thermal conditions were around 27.0degreesC and around 0.25degreesC, respectively, in these experimental conditions. On the other hand, reduction of skin temperature on exposed parts such as the instep reduced the favorable impression. However, there was no clear relationship between radiative sensation and favorable impression. (C) 2003 Elsevier Ltd. All rights reserved.

Performance of heat charge/discharge of magnesium nitrate hexahydrate and magnesium chloride hexahydrate mixture to a single vertical tube for a latent heat storage system
K Nagano, K Ogawa, T Mochida, K Hayashi, H Ogoshi
APPLIED THERMAL ENGINEERING, 24, 2-3, 209, 220, PERGAMON-ELSEVIER SCIENCE LTD, Feb. 2004, [Peer-reviewed]
English, Scientific journal, The authors focused on a mixture of magnesium nitrate hexahydrate as a base material and magnesium chloride hexahydrate as an additive to store and utilize urban waste heat from emerged co-generation systems, typically available at temperatures of 60-90degreesC. The second paper revealed that this mixture has good thermal characteristics as a PCM for latent thermal energy storage. In this study, heat charging and discharging experiments were done using a heat storage tank with a simple vertical heat exchange unit. These showed that effective use of the phase change temperature region resulted in an available enthalpy of 2.0-2.5 times that of sensible heat storage in water. In addition, corrosion tests were conducted and results showed SUS316 and aluminum can be used to build storage tanks and heat exchangers for this mixture. (C) 2003 Elsevier Ltd. All rights reserved.

Thermal characteristics of magnesium nitrate hexahydrate and magnesium chloride hexahydrate mixture as a phase change material for effective utilization of urban waste heat
K Nagano, K Ogawa, T Mochida, K Hayashi, H Ogoshi
APPLIED THERMAL ENGINEERING, 24, 2-3, 221, 232, PERGAMON-ELSEVIER SCIENCE LTD, Feb. 2004, [Peer-reviewed]
English, Scientific journal, The objective of this study is effective utilization of urban waste heat from emerging co-generation systems, typically available at temperatures of 60-100degreesC. The authors investigated latent heat storage by materials with phase change temperatures in the above range, and focused on a mixture of magnesium nitrate hexahydrate as a base material and magnesium chloride hexahydrate as an additive to modulate the melting point. Addition of 5-10 wt% of the latter resulted in a modulated melting point of around 80degreesC and a heat of fusion of about 150 kJ/kg. Increasing the mix ratio had little effect on heat of fusion, but allowed the melting point to be reduced to about 60degreesC. Repeated melting and solidification tests showed that the heat of fusion and melting point retained their original values after 1000 cycles. (C) 2003 Elsevier Ltd. All rights reserved.

Development of a ventilation system utilizing thermal energy storage for granules containing phase change material
S Takeda, K Nagano, T Mochida, K Shimakura
SOLAR ENERGY, 77, 3, 329, 338, PERGAMON-ELSEVIER SCIENCE LTD, 2004, [Peer-reviewed]
English, Scientific journal, We have developed an experimental ventilation system that features direct heat exchange between ventilation air and granules containing a phase change material (PCM). Measurement of outlet air temperature when the inlet air temperature was periodically varied to simulate changes of outdoor ambient air temperature showed that the outlet air temperature was stabilized and remained within the phase change temperature range. This effect is expected to be useful in practical ventilation systems. The potential of such systems for reducing ventilation load was examined through computer simulation for eight representative cities of Japan. This revealed how different temperature conditions would affect required heat storage capacity. (C) 2004 Elsevier Ltd. All rights reserved.

Field experiments and analyses on a hybrid solar collector
H Saitoh, Y Hamada, H Kubota, M Nakamura, K Ochifuji, S Yokoyama, K Nagano
APPLIED THERMAL ENGINEERING, 23, 16, 2089, 2105, PERGAMON-ELSEVIER SCIENCE LTD, Nov. 2003, [Peer-reviewed]
English, Scientific journal, This paper describes the effectiveness of a hybrid solar collector that generates both electric power and heat. Experiments and analyses were conducted on power and heat generation characteristics of the hybrid solar collector.
First, experiments under constant supply temperature of brine were made and it was found that conversion efficiency ranged from 10% to 13%, and that collector efficiencies at 20 and 40 degreesC brine temperature were from 40% to 50% and approximately 20%, respectively.
Second, the efficiency of the hybrid solar collector was compared to those of a photovoltaic and a solar collector and it was clarified that the hybrid collector had an advantage in terms of exergy efficiency, though there is some lowering of collector efficiency.
Evaluation of annual energy balance of hybrid solar collectors installed on a low energy house at Hokkaido University proved the hybrid solar collectors to have a high degree of feasibility. (C) 2003 Elsevier Ltd. All rights reserved.

Development of High Efficient Solar Hot Water Supply System Using Evacuated Solar Collectors with PCM/water Hybrid Thermal Energy Storage
NAGANO Katsunori, HASHIMOTO Takashi, MOCHIDA Tohru, SHIMAKURA Kazumi
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 15, 2, 1077, 1080, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 20 Aug. 2003
Japanese

Development of thermal-photovoltaic hybrid exterior wallboards incorporating PV cells in and their winter performances
K Nagano, T Mochida, K Shimakura, K Murashita, S Takeda
SOLAR ENERGY MATERIALS AND SOLAR CELLS, 77, 3, 265, 282, ELSEVIER SCIENCE BV, May 2003, [Peer-reviewed]
English, Scientific journal, The authors have developed experimental thermal-photovoltaic (PV) hybrid exterior wallboards that incorporate of PV cells. The clapboard-shaped hybrid wallboards permit modular assembly that can be more easily adapted for building applications than previous PV systems. Solar heat is collected in the form of heated air circulating in the air gap between the hybrid wallboard and the thermal insulation of the exterior walls. This paper presents an evaluation of both the electrical power generating ability and the solar heat collection capacity during winter of six variations of the experimental thermal-PV hybrid wallboard. In addition, exergy analyses were conducted. (C) 2002 Elsevier Science B.V. All rights reserved.

A FIELD EXPERIMENT ON LARGE SCALE SNOW STORAGE WITH HIGH DENSITY
NAGANO Katsunori, MOCHIDA Tohru, SHIMAKURA Kazumi, HANZAWA Hisashi, NAKAMURA Satoshi
Journal of environmental engineering, 566, 566, 51, 56, 一般社団法人日本建築学会, 30 Apr. 2003, [Peer-reviewed]
Japanese, A field experiment of large scale snow storage was conducted in Sapporo. Objectives of this experiment are to experimentally verify that the storing snow with adding water is effective for snow compression and for making high density without any mechanical machines. Snow was stored in a large underground pit, which has a diameter of 1.0 m and 6.7 m deep with or without adding water. It was clarified that water addition to the stored snow is very effective to compress the shallow layer of the stored snow. In this time, water permeated through stored snow layer and fell down into the bottom space. It means that added water can be used repeatedly for the compression when water in the bottom space is pumped up. The observed maximum dry snow density was 582 kg/m^3.

Development of a database of low energy homes around the world and analyses of their trends
Yasuhiro Hamada, Makoto Nakamura, Kiyoshi Ochifuji, Shintaro Yokoyama, Katsunori Nagano
Renewable Energy, 28, 2, 321, 328, Feb. 2003
English, Scientific journal, This study aims to develop a database of low energy techniques for homes around the world, for use in systematically evaluating the low energy home in each region, where climate, culture and policy differ. First, a database was made for the purpose of the systemizing passive and active techniques. Data were input according to seven chapters and 155 items, and 66 homes in 17 nations have been recorded. Homes adopting super insulation, high airtightness and solar energy utilization are common in the each country. The thermal insulation performance of wall and window of the housing in Japan is somewhat inferior to that overseas. It was shown that exhaust heat recovery is rarely adopted in Japan and that the underground thermal energy utilization was seen in less than 10% of recorded homes. Second, recorded homes were categorized according to characteristics of adopted strategies, and the reduction rate of purchased energy versus the purchased energy for a typical home was calculated. This revealed the purchased energy reduction rate of homes with both solar heat utilization and photovoltaic power generation to be very high. © 2002 Elsevier Science Ltd. All rights reserved.

Thermal characteristics of manganese (II) nitrate hexahydrate as a phase change material for cooling systems
K Nagano, T Mochida, S Takeda, R Domanski, M Rebow
APPLIED THERMAL ENGINEERING, 23, 2, 229, 241, PERGAMON-ELSEVIER SCIENCE LTD, Feb. 2003, [Peer-reviewed]
English, Scientific journal, The imbalance of electrical demand in summer due to cooling system demand is a big problem in many countries. One promising solution is shifting peak demand from early afternoon to night by utilizing natural cold energy resources such as cool outside air during night or running a refrigerator driven by midnight power. In these cases, using the thermal energy storage (TES) of phase change material (PCM) which has a melting point from 15 to 25 degreesC is one of the most effective ideas. However, few suitable PCMs for this temperature range are at present commercially available. This study aims to evaluate the potential of Mn(NO3)(2).6H(2)O (manganese (11) nitrate hexahydrate) as a new PCM for the TES of cooling systems. First, experiments on the modulation of the melting point of Mn(NO3)(2).6H(2)O and reduction of super-cooling were made by dissolving small amounts of salts in the material. Consequently, MnCl2.4H(2)O was found to have good performance with regard to both modulation of the melting temperature and the heat of fusion. Next, a thermal response test was carried out by using a small cylindrical vessel. Results showed that the required temperature levels for charging and discharging the heat of this mixture were clarified. In addition, the price and safety of this material as a PCM are discussed. (C) 2002 Elsevier Science Ltd. All rights reserved.

9-8. Potential of CO_2 Reduction by Ground Source Heat Pump Systems in Hokkaido
NAGANO Katsunori
Proceedings of the Annual Conference of The Japan Institute of Energy, 12, 426, 427, The Japan Institute of Energy, 2003
Japanese

A STUDY ON COMPRESSION OF SNOW DURING STORAGE FOR COLD ENERGY RESOURCE
NAGANO Katsunori, MOCHIDA Tohru, SHIMAKURA Kazumi, HANNZAWA Hisashi, NAKAMURA Satoshi
Journal of architecture,planning and environmental engineering, 67, 562, 31, 37, Architectural Institute of Japan, Dec. 2002, [Peer-reviewed]
Japanese, This study aims to experimentally evaluate the compression of snow during storage in a deep storage tank. First, small scale experiments related to acceleration of the compression of snow by means of water addition for three hours were carried out. Results showed that the addition of 20 wt% water was suitable. In addition, coefficients of viscosity of the compression for wet snow in a short term compression were evaluated. Next, long term experiments concerned with compression of dry snow for the wide range of snow density were done. When the initial snow density was high, the changes of coefficients of viscosity of compression with snow density were quite different from the previous empirical equation for the natural fallen snow. It was shown that the maximum dry snow densities were limited and each maximum density reached about 562 kg/m^3 independent of the initial density. Coefficient of viscosity of the compression was approximately 9.0 × 10^<11> Pas at this maximum density. A calculation method of coefficient of viscosity of the compression was proposed using this point for the wide range of the initial snow density.

STABILIZATION OF SUPPLY AIR TEMPERATURE BY USING GRANULATED PHASE CHANGE MATERIALS AND ITS APPLICATION TO VENTILATION SYSTEM OF A HOUSE DURING SUMMER
NAGANO Katsunori, TAKEDA Sayaka, MOCHIDA Tohru, SHIMAKURA Kazumi
Journal of architecture,planning and environmental engineering, 67, 562, 61, 67, Architectural Institute of Japan, Dec. 2002, [Peer-reviewed]
Japanese, Authors have proposed a direct heat exchange system between granulated phase change materials (PCM) and air. In this paper, experiments are conducted with packed bed of granulated PCM when inlet temperature is changed periodically such as outdoor air temperature. Stabilization effects of supply air temperature are demonstrated by experiments and calculations. Results from a computer simulation program, which was shown in previous paper, can reproduce the variation of actual outlet temperature, which is always in phase change condition. Also, reduction of cooling load for ventilation is examined among 8 cities through the computer simulation. Suitable heat storage capacity is shown.

Study on design method of autonomous energy city by using Digital National Land Information : Applicability of underground thermal energy utilization system
NAKAMURA Makoto
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 14, 3, 1273, 1276, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 08 Aug. 2002
Japanese

Study on design method of autonomous energy city by using Digital National Land Information : Seasonal heat recovery characteristics and numerical analysis on space heating and cooling system
FUCHIGAMI Shigeki
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 14, 3, 1277, 1280, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 08 Aug. 2002
Japanese

An experimental study of thermal characteristics of phase change materials for effective utilization of urban waste heat
ogawa Kenji
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 14, 2, 937, 940, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 08 Aug. 2002
Japanese

A Study on Floor Supply Air Conditioning System in Building Structure Thermal Storage with Granulated Phase Change Materials
TAKEDA Sayaka
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 14, 2, 869, 872, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 08 Aug. 2002
Japanese

The evaluation of energy saving and thermal environment of the hybrid air conditioning with natural ventilation
Hayashi Kengo
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 14, 3, 1641, 1644, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 08 Aug. 2002
Japanese

Influence of natural convection on forced horizontal flow in saturated porous media for aquifer thermal energy storage
K Nagano, T Mochida, K Ochifuji
APPLIED THERMAL ENGINEERING, 22, 12, 1299, 1311, PERGAMON-ELSEVIER SCIENCE LTD, Aug. 2002, [Peer-reviewed]
English, Scientific journal, Estimation of the heat recovery rate in high-temperature underground storage (>50 degreesC) is required before such a system can be built. However, if high-temperature water is injected into and stored in the aquifer, large-scale natural convection could occur that might reduce the heat recovery rate. This study aims to clarify the universal quantitative condition under which natural convection appears and exerts an observable influence for a system with forced horizontal flow in the saturated porous medium. The authors investigated this using both experiments and computer simulations.
A test section simulating an aquifer was made. Warm water was injected into the test section, which was filled with glass beads. The temperature distribution and the flow rate profile at the outlet were measured. The authors found that the limit condition at which natural convection influences the forced horizontal flow can be determined from the velocity profile and modified Rayleigh number Ra*. In addition, the heat transfer coefficients of the upper and the lower side of walls were estimated. A computer simulation was made for calculation of the temperature field and the velocity vector in the porous medium under natural convection and under forced convection. As calculated temperature fields and flow rate distributions at the outlet were similar to the experimental results, it is thought that this program can be applied to evaluation of the temperature and the velocity of aquifer thermal energy storage. In addition, an index expressing the degree of influence of natural convection on forced convection was proposed. (C) 2002 Elsevier Science Ltd. All rights reserved.

PERFORMANCE OF THERMAL-PV HYBRID WALLBOARDS INCORPORATING PV CELLS DURING WINTER
NAGANO Katsunori, MOCHIDA Tohru, SHIMAKURA Kazumi
Journal of architecture and planning, 67, 556, 39, 45, 社団法人日本建築学会, 30 Jun. 2002, [Peer-reviewed]
Japanese, The authors have developed thermal-photovoltaic (thermal-PV) hybrid exterior wallboards that produce both thermal energy and electricity through solar collection and the incorporation of photovoltaic (PV) cells, respectively. The clapboard-shaped hybrid wallboards permit modular assembly that can be more easily adapted for residential applications than previous PV systems. Solar heat is collected in the form of heated air circulating in the air gap between the hybrid wallboard and the thermal insulation of the exterior walls. This paper presents an evaluation of both the electrical power generating ability and the solar heat collection capacity during winter of six variations of the experimental thermal-PV hybrid wallboard. In addition, exergy analyses were conducted using a computer simulation program written to evaluate the thermal energy collection ability of the hybrid wallboards.

A STUDY ON CHARACTERISTICS OF DIRECT HEAT EXCHANGE BETWEEN GRANULATED PHASE CHANGE MATERIALS AND AIR
NAGANO Katsunori, TAKEDA Sayaka, MOCHIDA Tohru, SHIMAKURA Kazumi
Journal of architecture and planning, 67, 556, 55, 61, Architectural Institute of Japan, Jun. 2002, [Peer-reviewed]
Japanese, Latent heat storage is a kind of heat storage technology and heat is charged or discharged through phase change, melting or solidification, respectively. Authors proposed a direct heat exchange system between granulated phase change material (PCM) and air. PCM is consisted from granulated porous media and paraffin. Its particle diameter is about 1〜3mm. Advantage of this system is that heat transfer coefficient is kept relative large and continuous during phase change. In this investigation, column experiments related with heat exchange between PCM and air were conducted. Also, a computer simulation program was made and phase change period was discussed by the proposal non-dimensional time.

ISO‐7933およびISO‐11079の改訂に向けての一提案
佐古井智紀, 持田徹, 長野克則, 嶋倉一実
人間と生活環境, 9, 1, 18, 26, Japanese Society of Human-Environment System, Apr. 2002, [Peer-reviewed]
Japanese, It is important to clarify the applicable range and the characteristics of thermal indices for designing and evaluating a thermal environment. In this paper, from the viewpoints of thermal physiology, two indices stipulated by ISO, i.e., ISO-7933 for hot environments and ISO-11079 for cold-environments based on thermal equilibrium of the human body, were verified. The human model on ISO-7933 expressed in a linear multiple regression formula cannot always indicate the relationship between thermal physical states and sweat secretion in man. Therefore, this paper proposes that the sweat rate should be evaluated based on the thermal physiological state rather than the thermal equilibrium remainder. In addition, in order to make a new index based on the ISO-7933 concept, which deals with heat storage and dehydration as a measure for evaluation, the authors propose to deal with increase in body enthalpy and sweat secretion as they simultaneously occur. In an analysis of ISO-11079, a similarity is seen between IREQ (Required Clothing Insulation) for general cooling and the WCI (Wind Chill Index) for local cooling in outdoor environments from the viewpoint of thermal physiological engineering interpretation. Considering the scope of application of WCI stated in ISO-11079, it is proposed that thresholds of locally unpleasant or critical states be applied as the values for skin temperature in WCI calculations.

Experiment and Evaluation of Thermal Sensation in Outdoor Environment
KUWABARA Kouhei, MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi
Journal of human and living environment, 9, 1, 10, 17, Japanese Society of Human-Environment System, Apr. 2002, [Peer-reviewed]
Japanese, Thermal sensation experiments on subjects were carried out in Sapporo in order to evaluate outdoor environments. The evaluation method for an outdoor thermal environment is verified by using operative temperature, standard operative temperature and standard new effective temperature based on effective radiant temperature indicating the effect of solar radiation. Mean skin temperatures of the human body correlated with thermal sensations, better within individuals than in combined data for all subjects. Comparing the standard operative temperature with the operative temperature, the thermal sensation correlated with the former better than the latter. This result means the effective radiant temperature can indicate the effect of solar radiation. Furthermore, the SET* values including the effect of solar radiation correlated well with thermal sensation.

Field performance of a Japanese low energy home relying on renewable energy
Y Hamada, M Nakamura, K Ochifuji, K Nagano, S Yokoyama
ENERGY AND BUILDINGS, 33, 8, 805, 814, ELSEVIER SCIENCE SA, Oct. 2001, [Peer-reviewed]
English, Scientific journal, This paper describes the construction and evaluation of an experimental low energy home assisted by a hybrid system using natural energy resources and unused energy. The home, for which a ground source heat pump (GSHP) system has been installed, was built on the campus of Hokkaido University, Japan in March 1997. The total floor area of the home is 192 m(2). This home is super insulated and airtight; the calculated coefficient of heat loss is 0.97 W/m(2) K. It has various passive strategies including direct solar heat gain and a ventilation system with an exhaust stack. Photovoltaic (PV) modules, wind power and solar collectors are adopted in order to achieve self-sufficiency in electric power and domestic hot water (DHW) supply. A GSHP is used for space heating and cooling. Two vertical steel wells are used as vertical earth heat exchangers (VHE). In summer, there is a floor cooling system using piped cold water from the VHE. Approximately 80% of the home's total energy was provided by IN modules, solar collectors, as well as underground and exhaust heat. The annual amount of purchased energy during the test period was 12.5% that of a typical home in Hokkaido. (C) 2001 Elsevier Science B.V. All rights reserved.

An experimental study on direct heat exchange between air and granulated PCM
TAKEDA Sayaka
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 13, 3, 1501, 1504, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 10 Aug. 2001
Japanese

Experimental study on modulation of PCM for waste heat storage system and its thermal characteristics
Ogawa Kenji
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 13, 3, 1497, 1500, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 10 Aug. 2001
Japanese

Study on Evaluation Method of Thermal Sensation at Sedentary Activity
SAKOI Tomonori
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 13, 3, 1345, 1348, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 10 Aug. 2001
Japanese

Relationship between physiological-psychological reaction and effective radiant temperature in surrounded space by four walls.
KUWABARA Kouhei
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 13, 2, 781, 784, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 10 Aug. 2001
Japanese

Fundamental Study of Weighting Factor for Calculating Mean Skin Temperature
KUWABARA Kouhei, MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi
Journal of human and living environment, 8, 1, 33, 40, Japanese Society of Human-Environment System, Jun. 2001, [Peer-reviewed]
Japanese, It is said that mean skin temperature correlates closely with thermal sensation. As local skin temperatures are not uniform, when thinking about heat exchange between the human body and the environment and thermal sensation in the entire human body, we have to average local skin temperatures according to some method. Skin temperature is the result of heat exchange between the human body and the surroundings. When we calculate a formula for heat equilibrium between the human body and the environment, it turns out that the formula for mean skin temperature includes the ratios for both skin area and the combined heat transfer coefficient. Recently, a thermal manikin that expresses the heat characteristics of the human body was developed. In this study, we measured local combined heat transfer coefficients with a thermal manikin and calculated new weighting factors for the formula for mean skin temperature. The results obtained in the present study are as follows: 1) When the formula for mean skin temperature is used, the total combined heat transfer coefficient for the human body has to average local combined heat transfer coefficients according to the weighting factor for the surface area. 2) It was found that this weighting factor does not depend on both the air velocity and the difference between the skin surface temperature and air temperature. 3) A new weighting factor for mean skin temperature has been proposed.

A Novel Evaluation Method of Radiative Heating and Cooling System, and its Application to the Building Design
TAKEDA Sayaka
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 12, 1, 357, 360, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 10 Aug. 2000
Japanese

Experiments on a Ground Heat Exchanger United with a Sewer Pipe, and its Application
HONDA Kimihiro
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 12, 3, 1521, 1524, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 10 Aug. 2000
Japanese

Fundamental Study on Mean Radiant Temperature including Solar Radiation.
Kondo Motomu
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 12, 3, 1605, 1608, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 10 Aug. 2000
Japanese

Numerical Analysis on Long-term Snow Storage and Heat Recovery Taking Consolidation of Snow and Moisture Penetration into Account
MIYAZAKI Teruo
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 12, 2, 973, 976, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 10 Aug. 2000
Japanese

Relation between Equi-Thermal Sensation Line and Mean Skin Temperature-Skin Wettedness
MOCHIDA Tohru
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 12, 3, 1213, 1216, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 10 Aug. 2000
Japanese

Fundamental Study on Estimation of Mean Skin Temperature
SAKOI Tomonori
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 12, 3, 1209, 1212, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 10 Aug. 2000
Japanese

Experiments on influence of snowfall on photovoltaic power generation system in Sapporo
MURASHITA Kazunori
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 11, 3, 1373, 1376, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 10 Aug. 1999
Japanese

STUDY ON DIFFUSION OF DISTRICT HEATING AND COOLING IN JAPAN AND ITS EFFECTS ON GLOBAL ENVIRONMENT PRESERVATION
SADOHARA Satoru, NAGANO Katsunori, MIURA Masao, MURAKAMI Kimiya, MORIYAMA Masakazu, SHIMODA Yoshiyuki, KATAYAMA Tadahisa, YODA Hirotoshi, KITAYAMA Hiroki
Journal of architecture,planning and environmental engineering, 510, 510, 61, 67, Architectural Institute of Japan, Aug. 1998, [Peer-reviewed]
Japanese, The purpose of this study is to clearify the possibility of diffusion of District Heating and Cooling (DHC) in Japan in the near future and its effects on global environment preservation. We selected potential supplied areas of DHC in all over Japan by analyzing heating, cooling and hot-water demand character. We investigated the sourrounding unused energy of the selected areas and analyzed its effect. As a result, total DHC demand is 259,933TJ/a (62,185Tcal/a), that is quivalent to 11.1% of total demand in Japan. By using unused energy as heat sources, 88,733TJ/a (21,228Tcal/a) of primary energy consumption and 1.78 mil.ton of CO_2 emission can be reduced per year in Japan. It means that the DHC promotion is very important and realistic policy in urban area for CO_2 emission which contributes to global environment preservation.

Improving Electrical Load Curves in Urban Buildings by Using Small Wind Power Generators
HATANO Takasi
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 10, 2, 865, 868, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 10 Jul. 1998
Japanese

Survey on Outdoor Clothing and Thermal Sensation
KONDO Motoo
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 10, 2, 965, 968, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 10 Jul. 1998
Japanese

Thermal Sensation Observed while Sitting Cross-legged on the Heated Floor
TAKEDA Toyotsugu
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 10, 3, 1425, 1428, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 10 Jul. 1998
Japanese

Experiments regarding the relation among average skin temperature. wettedness and thermal sensation
KATADA kenji
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 8, 1, 89, 92, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 01 Aug. 1996
Japanese

Experiments on Low Temperature Floor Heating for Energy Saving and Human Acceptability : Part.2 The Thermal Environment and Heat Balance of the Room
ISAKA mitsuo
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 8, 2, 661, 664, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 01 Aug. 1996
Japanese

Observation of Soil Temperature Distribution under Natural Climatic Conditions in Sapporo : Part.2 Measurement of Specific Heat and Thermal Conductivity of Soil Sample
HISAMITSU atsunobu
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 7, 1, 965, 968, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 01 Sep. 1995
Japanese

Estimation of heat energy and its flow within urban water of Sapporo
NARITA shigeaki
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 7, 1, 1149, 1152, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 01 Sep. 1995
Japanese

Observation of Soil Temperature Distribution under Natural Climatic Conditions Sapporo : Part.1 An Outline of the Station and Observed Results
NAKAMURA makoto
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 7, 1, 961, 964, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 01 Sep. 1995
Japanese

Evaluation of District Heating and Cooling System by Using Exhaust Heat : Part 8. Optimal Scale and Design for Cogeneration System and Its Effect
MORISHITA naoki
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 7, 2, 941, 944, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 01 Sep. 1995
Japanese

Survey on energy consumption at business building in Sapporo
MORISITA naoki
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 6, 3, 1157, 1160, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 01 Sep. 1994
Japanese

Studies on Seasonal Thermal Storage by using Vertical Ground Heat Exchangers : Part.1 An Experiment on Heat Extraction and Cold Storage in Winter
HAMADA Yasuhiro, HAMADA yasuhiro
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 6, 1, 273, 276, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 01 Sep. 1994
Japanese

Studies on Seasonal Thermal Storage by Using Vertical Ground Heat Exchangers : Part.2 Analysis of Heat Extraction by Using Three Kinds of Heat Exchangers
ASAGIRI daisuke
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 6, 1, 277, 280, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 01 Sep. 1994
Japanese

Aproximation of surface temperature at a vertical ground pipe by Line source theory
NAGASAKA shigeyuki
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 6, 1, 293, 296, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 01 Sep. 1994
Japanese

Analysis and measurement of daylight and solar radiation for CIE : (part4) Luminous efficacy and estimation of daylight and solar radiation in Sapporo
KAKIOKA naoki
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 6, 1, 249, 252, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 01 Sep. 1994
Japanese

Study on effect of long-term heat storage in an aquifer
YOSHIDA hiroshi
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 6, 1, 297, 300, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 01 Sep. 1994
Japanese

The Study on Utilizing Waste Heat of The Sapporo Recycle Factories Zone
SATO hideki
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 6, 2, 613, 616, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 01 Sep. 1994
Japanese

Evaluation of District Heating and Cooling System by Using Exhaust Heat : Part 7. A Design for the System and Evaluation by Simulation
WATANABE hidenori
Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 6, 3, 1601, 1604, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, 01 Sep. 1994
Japanese

The stable thermal output of a moving bed reactor based on composite binary salt hydrates
LIU Hongzhi, HE Fang, NAGANO Katsunori, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2024, 2024

Study on the optimal operation control system for a radiant floor heating system in a nZEH using Grey Box Model
LIU Gumo, NAGANO Katsunori, LIU Hongzhi, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2024, 2024

A Study on the Performance of a Carnot Battery System with a Transitional CO2 Heat Pump
萬崎朋也, LIU Hongzhi, 長野克則, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2024, 2024

Modeling and Case Study of a Community Energy Management System for Renewable Thermal Energy Utilization
ZHENG Xiaoyang, LIU Hongzhi, NAGANO Katsunori, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2024, 2024

Research and Development of Low-Cost Adsorption Heat Pump using Natural Mesoporous Material: 28^th Report: Regional Performance Prediction of the Adsorption Heat Pump
HE Fang, 北岡敏幸, 五十嵐梨紗, LIU Hongzhi, 長野克則, 外川純也, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 58th, 2024

Experimental verification of a home energy management system based on the predictions of PV’s output and thermal load
ZHENG Xiaoyang, LIU Hongzhi, NAGANO Katsunori, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 58th, 2024

Thermal energy storage performance of composite binary salt hydrates with different porous matrices
LIU Hongzhi, HE Fang, NAGANO Katsunori, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 58th, 2024

Experimental investigation of methods to reduce outgassing from core materials in the fabrication process of transparent vacuum insulation panels
Takato Miyata, Erkki Hirvonen, Takao Katsura, Katsunori Nagano, E3S Web of Conferences, 396, 16 Jun. 2023
The notion that modern buildings should strive to be net-zero energy buildings (NZEBs) is widely accepted. In order to improve window's insulation in existing buildings, structured-core transparent vacuum insulation panels (TVIPs) are proposed. TVIPs mainly consist of the structured core material, the low-emissivity film, and the transparent gas barrier envelope. TVIPs have high insulation performance and are inexpensive to manufacture and can be easily installed. However, it is necessary to overcome the issue of preventing the pressure rise inside TVIP after vacuum sealing. The authors constructed an experimental setup by applying the pressure-rate-of-rise-method to establish the fabrication process for TVIPs that prevents the pressure rise. In this experiment, a gas barrier film with a straw was used as the vacuum chamber. This could reproduce the pressure increase in the TVIP after sealing and the gas flow rate in the TVIP is evaluated. The experimental results showed that the internal pressure of TVIP could be reduced to about 1 Pa after vacuuming while heating for 8 hours, coating the core material, and sealing the getter material.

Experimental study on insulation performance of structured-core transparent vacuum insulation panels for different core materials
Erkki Hirvonen, Takato Miyata, Takao Katsura, Katsunori Nagano, E3S Web of Conferences, 396, 16 Jun. 2023
The conversion of existing buildings to ZEH and ZEB requires increased thermal insulation, in which the insulation of window surfaces is particularly important. This study focused on measuring and comparing the changes in thermal conductivity of transparent vacuum insulation panels (TVIP), which could be used as simple and easy to install insulation to building windows. These changes were later compared with the results obtained from previous studies conducted by other research group members. The measured thermal conductivity values ranged between 0.017 W/(m∗K) of the best performing frame-type with the thickness of 5.1 mm, and 0.011 W/(m∗K) of the best performing double-layered peak-type core with the thickness of 7.8 mm. The calculated U-values of the samples ranged between 4.1 W/(m2∗K) and 1.4 W/(m2∗K). From the experimental results it could be seen that changing the core composition had a larger effect on the overall thermal conductivity of the sample than the added parameters of coating, getter agent, and heating had. These parameters, however, have had a substantial effect on the longevity of the vacuum inside the sample envelopes, and will thus be experimented further.

Parametric analysis of the free-suspended ceiling radiant cooling panel using CFD simulation
Minzhi Ye, Ahmed A. Serageldin, Katsunori Nagano, E3S Web of Conferences, 396, 16 Jun. 2023
In this study, the parametric analysis was conducted on different designs of the free-suspended ceiling radiant cooling panel (CRCP) and panel area to improve its cooling performance. A three-dimensional CFD simulation model was developed to investigate the cooling capacity and heat transfer coefficient of the CRCPs. Four parameters were used to be the design parameters: the panel length L, the panel curvature radius r, the void distance between each panel or panel segment d, and the panel coverage area Ac. The L/r ratio was also considered, representing the curvature of panel. Twenty-three designs were compared under seven different cooling load conditions. The cooling capacity curve of each design was given as the regression curve of the cooling capacity and temperature difference between air and panel surface. The results show that the CRCPs with curved shape and void have better cooling performance compared to the reference results. The cooling capacity and heat transfer coefficient increase with increasing curvature radius and coverage area and decreasing the panel length. Additionally, the nominal cooling capacity is the largest when L/r is 0.5. The distance between adjacent panels or panel segments and the panel to the wall is most significant in enhancing cooling capacity.

Investigation on Longer Service Life of Vacuum Insulation Panels by Applying Double Envelopes
Takao Katsura, Katsunori Nagano, E3S Web of Conferences, 396, 16 Jun. 2023
The conversion of existing buildings to ZEB requires high thermal insulation. Vacuum insulation panels (VIPs) have a potential to be used for retrofitting thermal insulation of existing buildings from the viewpoint of low thermal conductivity, small thickness, and light weight. However, in order to realize vacuum insulation panels applicable to building insulation, it is necessary to overcome the challenge of maintaining the low pressure at which the high insulation performance can be achieved for several decades. The authors applied the double envelopes to VIPs and investigated longer service life of VIPs. The double envelope VIP is fabricated by fabricating a normal VIP, then wrapping the VIP with core materials, and then inserting it into the envelope for vacuum sealing. By applying the double envelopes, the pressure difference and the permeation of gas in inner VIP can be drastically reduced, resulting in a longer VIP lifetime. In this paper, the gas permeabilities of the gas barrier envelopes were experimentally estimated. Then, the pressure ageing in the double envelope VIP is calculated. The inner pressure after 25 years was 1.6 Pa for the envelope of aluminium composite film and 59.3 Pa for the envelope of transparent gas barrier film, indicating that long-term insulation performance could be improved. Next, the authors carried out acceleration test, in which the double envelope VIPs were put in a chamber at 80oC and remove once a month to measure the thermal conductivity. Even after 136 weeks, one sample showed only a 9.1% decrease in thermal resistance. From this result, it was confirmed that long-term insulation performance can be greatly improved by fabricating double envelope VIPs with the getter agent inside and the desiccant agent outside.

Establish of short-term heat storage methods for ground source heat pump system
大原知哉, 葛隆生, 長野克則, 中村靖, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 57th, 2023

R and D of Low-cost Adsorption Heat pump using Natural Mesoporous Material: Part 26: Investigation of practical application of adsorption refrigerator using methanol
椎名理彩, HE Fang, 長野克則, 外川純也, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 57th, 2023

Study on Smart Communities with Heat Pump (Part 16) Optimization of Power Costs based on Mixed-Integer Linear Programming
AN Haochen, 長野克則, 葛隆生, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 57th, 2023

Evaluation of the Impact of Heat Pump Operating Characteristics on Performance under Load Fluctuations
木ノ内健, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 57th, 2023

Study on the shape of the core material of transparent vacuum insulation panels achieving high performance and thinness
原田遵, 宮田天和, HIRVONEN Erkki, 葛隆生, 長野克則, 張本和芳, 渡邉深雪, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 57th, 2023

Research on Low-cost Adsorption Heat Pumps using Natural Mesoporous Materials: Part 27: Performance evaluation of adsorption chiller using methanol as refrigerant
五十嵐梨紗, 長野克則, 外川純也, HE Fang, 椎名理彩, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 57th, 2023

Research of Adsorption Water harvesting using Natural Mesoporous Material: Part 5: Experimental study of freshwater production and thermal efficiency by a small adsorption desalination system
北岡敏幸, 外川純也, 長野克則, HE Fang, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 57th, 2023

Research and Development of Low-Cost Adsorption Heat Pump using Natural Mesoporous Material: 25^th Report: Annual Cooling Performance Prediction of the House Applied AHP based on Numerical Analysis
HE Fang, 長野克則, 外川純也, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 57th, 2023

Development of a multi-layered ground heat exchanger model considering groundwater advection
小司優陸, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 57th, 2023

Experimental Study on Cooling/Heating Quantity to the Foot and Improvement of Warming/Cooling Sensation of Human Body by Contact Heat Transfer Panel
辻仁香, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 57th, 2023

Experimental study on the improvement of thermal Insulation Performance and Durability of Transparent Vacuum Insulation Panels
粂春輝, 宮田天和, かつら隆生, 長野克則, 張本和芳, 渡邉深雪, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 57th, 2023

Study on the sustainability of open-loop ground source heat pump systems
沖原峻, 長野克則, 阪田義隆, 佐藤英樹, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 57th, 2023

世界の地中熱ヒートポンプシステム(GSHP)の動向
長野克則, 建築設備と配管工事, 61, 10, 2023

Optimizing Electricity Costs and Predicting Operating Strategies for Renewable Energy Building Systems by using Mixed Integer Linear Programming and LSTM Approach
AN Haochen, 長野克則, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2023, 2023

Analysis and optimization of energy consumption of town hall building in snowy and cold region
三浦広成, 長野克則, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2023, 2023

Analysis of Heat Recovery Effectiveness of Geothermal Heat Recovery Heat Pump Systems
木ノ内健, 葛隆生, 中村靖, 長野克則, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2023, 2023

Development of an integrated design tool for ground source heat pump systems
葛隆生, 二村孝平, 富樫英介, 鍋島佑基, 長野克則, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2023, 2023

Evaluation of Core Material in Structured-core Transparent Vacuum Insulation Panels For Windows: Numerical and Experimental Analysis
Erkki Hirvonen, Takao Katsura, Takato Miyata, Saim Memon, Ali Radwan, Katsunori Nagano, 2023 10th International Conference on Power and Energy Systems Engineering, CPESE 2023, 352, 358, 2023
The conversion of existing buildings to net zero-energy houses and net zero-energy buildings requires increased overall thermal insulation, in which the insulation of window surfaces is particularly important and effective route. The authors' research group has proposed a form of transparent vacuum insulation panels (TVIP), which could be used as simple and easy to install insulation to building windows. In this study, several 3D-printed core types were simulated and experimentally measured to compare the effectiveness of different core architectures as well as added vacuum layers. It was found that while there were differences between frame and peak type cores, these became negligible with smaller core spans, and largely disappeared when attached to a windowpane. A second layer of vacuum improved the sample core's overall heat transfer by 50 percent, while a third layer brought only a 24 percent improvement. Added benefits brought by the additional layers thus need to be balanced with the additional thickness inherent in the decision. It was also proven from experiments, that UTVIP of a single frame type core with double low-E films was 1.7 [W/(m2K)], and the UTVIP of double vacuum layer TVIP were 1.4 [W/(m2K)]. Higher insulation performance can thus be achieved in both ways. The created ANSYS model's predictions followed physical test results closely, validating said model as a tool for further structured-core experiments.

Experimental Evaluation of Thermal Performance of A New Multi-segmented Minichannel-based Radiant Ceiling Cooling Panel
Takao Katsura, Lan Ding, Ali Radwan, Katsunori Nagano, 2023 10th International Conference on Power and Energy Systems Engineering, CPESE 2023, 339, 345, 2023
In this paper, a new multi-segmented minichannel heat exchanger based radiant ceiling panel (M-RCP) is proposed. Experiments to evaluate M-RCPs' performance with different tilt angles were conducted. The result showed that the M-RCPs had an advantage compared to the conventional RCP from the viewpoint of cooling output per panel area and temperature difference. In addition, by providing the forced convection with fans, the cooling output from the M-RCP increased 3.6 times compared to that from the M-RCP without the forced convection. Furthermore, 3D computational fluid dynamics (CFD) models of M-RCPs were produced and the CFD models were validated by comparing with the experimental results. The result of comparisons indicated that the CFD models can predict the cooling output with high accuracy.

A STUDY ON DESIGN METHOD FOR THE GROUND HEAT EXCHANGER’S SPECIFICATION OF GROUND SOURCE HEAT PUMP SYSTEM (PART 2): QUANTIFICATION OF EXTRACTION / INJECTION PERFORMANCES ACCORDING TO SYSTEM OPERATION AND APPLICATION FOR SYSTEM DESIGN
KATSURA Takao, NAGANO Katsunori, NAKAMURA Yasushi, Journal of Environmental Engineering (Transactions of AIJ), 87, 800, 668, 676, 01 Oct. 2022
In this paper, the authors introduce the calculation method for the heat extraction/injection coefficient of ground heat exchangers (GHEs) (heat extraction/injection rate per length and temperature difference) according to the operating conditions of ground source heat pump system. Then, the heat extraction/injection coefficients of GHEs with the different specifications and the different system operating conditions were calculated. The result indicated that the heat extraction/injection coefficient with the operating time of the GSHP system per day of 8 h was approx. 1.6 times compared to the coefficient with the operating time of the GSHP system per day of 24 h., Architectural Institute of Japan, Japanese

天然メソポーラス材料を用いた吸着式ヒートポンプに関する研究(第14報)三次元数値計算を用いた熱回収・物質回収の性能向上に関する検討—Research and Development of Low-Cost Adsorption Heat Pump using Natural Mesoporous Material(14th Report)Investigation of the Heat Recovery and the Mass Recovery Processes based on the Three-Dimensional Numerical Calculation
賀 方, 長野 克則, 外川 純也, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, 4p, 2022
[東京] : 日本冷凍空調学会, Japanese

Study of the Heat Recovery and the Mass Recovery applied in the Adsorption Heat Pump based on Numerical Analysis
賀 方, 長野 克則, 外川 純也, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2022.3, 309, 312, 2022
A three-dimensional model is built to describe the mass and heat transfer inner the adsorbent. With the combination of the heat recovery and the mass recovery, COP and SCP of the AHP can be improved up to 0.607 and 0.393 kW/kg, respectively., The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Estimation of soil effective thermal conductivity for shallow geothermal system by data assmilation using ensemble Kalman filter
小司優陸, 葛隆生, 長野克則, 日本地球惑星科学連合大会予稿集(Web), 2022, 2022

Study on smart communities with heat pump (Part14) Optimal control of heat pump and battery
YANG Shibo, 長野克則, AN Haochen, 葛隆生, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 2022

Experimental study on the influence of the shape and material of the core material of transparent vacuum insulation panels on the insulation performance
宮田天和, 原田遵, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 2022

Research and Development of Low-Cost Adsorption Heat Pump using Natural Mesoporous Material: 24^th: Report: Performance Enhancement of Domestic Scale Adsorption Heat Pump based on Numerical Analysis
HE Fang, 長野克則, 外川純也, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 2022

An experimental study of a groundwater-source heat pump system based on a single water well
三浦広成, 長野克則, 阪田義隆, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 2022

Development of a simulation tool for performance prediction of horizontal ground heat exchangers using shallow ground thermal energy
前田基宏, 葛隆生, 小司優陸, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 2022

Research of Adsorption Water harvesting using Natural Mesoporous Material: Part 3: Construction of a small adsorption desalination system and experimental study of freshwater production and thermal efficiency
北岡敏幸, 長野克則, 外川純也, HE Fang, 井澤美つ輝, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 2022

100-year predictions of performances in a ground-source heating and cooling system under different climate scenarios
明山雄真, 阪田義隆, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 5, I_179, I_187, 2022
The purpose of this study is to evaluate the long-term efficiency of a ground-source heat pump system through a simulation for 100-yrs from 2001 to 2100 at an office building in cold Sapporo and warm Tokyo under three different scenarios of climate change. Hourly meteorological conditions were estimated from originally monthly data, and the calculation of thermal demands in a building followed. Underground temperatures were predicted considering thermal and water budgets on the surface. As a result, 20yrs-averaged seasonal performance factors were expected to be kept for both cooling and heating and by both vertical and horizontal heat exchangers. However, the performance will become lower in a specific case for heating in Tokyo because of constant electricity consumption for circulation pumps. The difference in the seasonal performance factors among the three scenarios was less than 0.1-0.2 in Sapporo. The value was about 0.7 for heating in Tokyo, indicating the uncertainty in the system efficiency under climate change., Japan Society of Civil Engineers, Japanese

A Study on Estimation of Nation-scale Spatial Interpolation of Geothermal Gradients
廣瀬陽大, 長野克則, 阪田義隆, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 2022

Evaluations of long-term insulation performance and thermal bridge on the double envelope VIPs
鎌田泰地, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 2022

Evaluation of influence by estimation error of ground thermal properties on performance prediction for ground source heat pump systems
二村孝平, 小司優陸, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 2022

Examination of outgassing suppression and long-term durability improvement of transparent vacuum insulation panels
原田遵, 宮田天和, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 2022

Long-term performance evaluation of a heat recovery ground source heat pump system and its application
大原知哉, 葛隆生, 長野克則, 中村靖, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 2022

Study on Adsorption Desalination using Natural Mesoporous Material: 4^th Report: Numerical Study on Increase of the Amount of Water Production and Cold Heat
井澤美つ輝, HE Fang, 長野克則, 外川純也, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 2022

Study on smart communities with heat pump (Part 15) Insolation forecast based on LSTM model
AN Haochen, 長野克則, YANG Shibo, 葛隆生, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 2022

Estimation of soil effective thermal conductivity from practical data of shallow geothermal system by data assimilation using ensemble Kalman filter
小司優陸, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 2022

Development of a simulation tool for performance prediction of horizontal ground heat exchangers using shallow ground thermal energy
前田基宏, 小司優陸, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 56th, 2022

Plastic after an extreme storm: A typhoon transports a tremendous amount of plastic debris into the ocean
中嶋亮太, 美山透, 北橋倫, 磯部紀之, 長野由梨子, 生田哲朗, 小栗一将, 土屋正史, 吉田尊雄, 青木邦弘, 前田洋作, 藤倉克則, 矢吹彬憲, 川村喜一郎, 鈴川真季, 山内拓也, RITCHIE H., 日本プランクトン学会報, 69, 2, 2022

Effect of groundwater flow on shallow geothermal energy utilization and its evaluation as apparent thermal conductivity
阪田義隆, アハメド セラジェルディンアワド, 葛隆生, 長野克則, 地盤工学会誌(Web), 70, 9, 2022

地中熱オープンループシステムにおける井戸性能評価に関する研究 その2 札幌三建ビルにおける還元井性能の経年変化
阪田義隆, 長野克則, 佐藤英樹, つくばみらい技術センター技術報告, 27, 2021

積雪寒冷地に建つ地下水熱ヒートポンプシステムを核としたZEBの評価「札幌三建ビルを対象として」第2報 2年間の運転評価と放射暖房の最適運転方法の検討
長野克則, 福岡拓真, YE M., 佐藤英樹, つくばみらい技術センター技術報告, 27, 2021

Uncertainty of Ground Source Heat Pump System Performance by Ensemble Simulation Considering Model Error
小司優陸, 葛隆生, 長野克則, 空気調和・衛生工学会大会学術講演論文集(CD-ROM), 2021, 2021

Investigation on Low-cost Ground Source Heat Pump System Installed to ZEH by Simulation
鎌田泰地, 葛隆生, 大原知哉, 長野克則, 空気調和・衛生工学会大会学術講演論文集(CD-ROM), 2021, 2021

Performance Enhancement of AHP by the Adjusting of the Adsorbent Filling method
HE Fang, 井澤美つ輝, 長野克則, 外川純也, 空気調和・衛生工学会大会学術講演論文集(CD-ROM), 2021, 2021

Investigation on net-zero energy houses in cold regions applying ground source heat pump systems using actual measurement data
大原知哉, 鎌田泰地, 葛隆生, 長野克則, 空気調和・衛生工学会大会学術講演論文集(CD-ROM), 2021, 2021

Evaluation by actual measurement of heat extraction performance of low-cost ground heat exchangers introduced in ZEH・ZEB
前田基宏, 小司優陸, 葛隆生, 長野克則, 空気調和・衛生工学会大会学術講演論文集(CD-ROM), 2021, 2021

Verification of long-term insulation performance of vacuum insulation panels with double layer envelops and investigation of thermal bridge reduction
葛隆生, 大原知哉, 長野克則, 空気調和・衛生工学会大会学術講演論文集(CD-ROM), 2021, 2021

Research on space thermal environment and energy saving of heat pump based on Fuzzy PID control
YANG Shibo, 長野克則, 空気調和・衛生工学会大会学術講演論文集(CD-ROM), 2021, 2021

Study on smart communities with heat pump (Part13) Environmental load reduction effect of a community consisting of buildings with model predictive EMS
長野克則, 葛隆生, 阪田義隆, 空気調和・衛生工学会大会学術講演論文集(CD-ROM), 2021, 2021

A study on future performance of ground-source heat pump systems in different climate scenarios
明山雄真, 阪田義隆, 葛隆生, 長野克則, 日本地熱学会学術講演会講演要旨集, 2021, 2021

Online estimation of model parameters for ground heat exchanger simulation by data assimilation with particle filter
小司優陸, 葛隆生, 長野克則, 日本地熱学会学術講演会講演要旨集, 2021, 2021

Estimation methodology and database construction of apparent thermal conductivity
阪田義隆, 葛隆生, 長野克則, SERAGELDIN A.A., CHAE H., 日本地熱学会学術講演会講演要旨集, 2021, 2021

Research on energy-saving smart house of heat pump based on fuzzy PID control
YANG Shibo, 長野克則, AN Haochen, 葛隆生, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2021, 2021

Performance evaluation of a low-cost ground heat exchanger using shallow ground
前田基宏, 葛隆生, 小司優陸, 小司優陸, 長野克則, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2021, 2021

Evaluation method for ground heat exchanger’s performance of ground source heat pump system
葛隆生, 長野克則, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2021, 2021

Thermal performance evaluation of ceiling radiant panels applying microchannel heat exchangers
大原知哉, 葛隆生, 長野克則, RADWAN Ali, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2021, 2021

Study on Adsorption Desalination using Natural Mesoporous Material: 2nd Report: Overall performance prediction of water production and cold heat using three-dimensional numerical simulation
井澤美つ輝, HE Fang, 長野克則, 外川純也, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2021, 2021

Research and Development of Low-Cost Adsorption Heat Pump using Natural Mesoporous Material: 13th Report: Performance Enhancement of Adsorption Heat Pump base on the Improvement of the Filling Method
HE Fang, 井澤美つ輝, 長野克則, 外川純也, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2021, 2021

Geothermal system simulation through program collaboration
富樫英介, 長野克則, 葛隆生, 鍋島佑基, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2021, 2021

A study and perspective on a nationwide database of geology and geotechnical property in a probability-based approach
阪田義隆, 葛隆生, 長野克則, 地盤工学研究発表会発表講演集(Web), 56th, 2021

Investigation of ZEB integrated with groundwater heat pump system in cold region (Part3) Examination of heating operation by simulation and demonstration experiment and confirmation of energy consumption
福岡拓真, 長野克則, 阪田義隆, 佐藤英樹, 山田開, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Life cycle cost analysis of ground source heat pump system designed by thermal response test analysis methods
CHAE Hobyung, 長野克則, 阪田義隆, 葛隆生, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Evaluation by actual measurement of heat extraction performance of low-cost ground heat exchangers introduced in ZEH・ZEB
前田基宏, 小司優陸, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Research of Adsorption Water harvesting using Natural Mesoporous Material: Part 2: Performance Improvement of Adsorption Water harvesting with Dip-coating type filling method
川俣翔, 長野克則, 外川純也, HE Fang, 井澤美つ輝, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Investigation on Low-cost Ground Source Heat Pump System Installed to ZEH by Simulation
鎌田泰地, 葛隆生, 大原知哉, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Verification of long-term insulation performance of vacuum insulation panels with double layer envelops and investigation of thermal bridge reduction
葛隆生, 大原知哉, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Developments and Standardization in Apparent Thermal Conductivity Estimation, Simplified Thermal Response Tests, and an Integrated Simulation/Design Tool for the Cost Reduction in Thermal Uses of Renewable Energy: Part 2: Construction of Geologic Database
阪田義隆, 葛隆生, 長野克則, SERAGELDIN Ahmed A., CHAE Hobyung, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Study on smart communities with heat pump (Part13) Environmental load reduction effect of a community consisting of buildings with model predictive EMS
藤井健斗, 長野克則, ZHOU Jiayi, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

A Study on Long-term Growth of Well Clogging Affecting Groundwater-source Heat Pump Systems
沖原峻, 阪田義隆, 長野克則, 佐藤英樹, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Investigation on net-zero energy houses in cold regions applying ground source heat pump systems using actual measurement data
大原知哉, 鎌田泰地, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Research on space thermal environment and energy saving of heat pumpbased on Fuzzy PID control
YANG Shibo, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Uncertainty of Ground Source Heat Pump System Performance by Ensemble Simulation Considering Model Error
小司優陸, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Energy saving for air conditioning and ventilation in sunlight type plant factories
鈴木大也, 葛隆生, RADWAN Ali, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Research on Adsorption Refrigerator using Natural Mesoporous Material: 2^nd Report: Experimental Research on Overall Mass and Heat Transfer Characteristics
井澤美つ輝, TANG Kexin, 長野克則, SEOL Sung-Hoon, 外川純也, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Research and Development of Low-Cost Adsorption Heat Pump using Natural Mesoporous Material: 22^nd Report: Performance Comparison with Different Filling Method based on Experiments
HE Fang, 川俣翔, 井澤美つ輝, 長野克則, 外川純也, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Developments and Standardization in Apparent Thermal Conductivity Estimation, Simplified Thermal Response Tests, and an Integrated Simulation/Design Tool for the Cost Reduction in Thermal Uses of Renewable Energy: Part 1: an Overview
長野克則, 葛隆生, 阪田義隆, SERAGELDIN Ahmed A., 藤井光, 内田洋平, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Combined calculation between simulation tool for GSHP system and TRNSYS and its applicatioapplication
YANG Kunning, 葛隆生, 前田基宏, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Investigation on upsizing transparent vacuum insulation panels and outgassing suppression from core materials
原田遵, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

Field measurement of nZEH integrated with Ground Source Heat Pump in Sapporo city
WANG Yiyang, 山田開, 長野克則, HE Fang, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 55th, 2021

凹型アルミニウム部材からなる天井放射冷暖房パネルの熱伝達特性に関する実験的検討
長野 克則, 叶 敏之, Ahmed A. Serageldin, 佐藤 英樹, つくばみらい技術センター技術報告 = TTC research activity reports / 三建設備工業(株)技術統括本部 編, 28, 1, 8, 2021
Japanese

地中熱オープンループシステムにおける井戸性能評価に関する研究(その3)札幌三建ビルにおける還元井の洗浄効果の比較分析
阪田 義隆, 長野 克則, 佐藤 英樹, つくばみらい技術センター技術報告 = TTC research activity reports / 三建設備工業(株)技術統括本部 編, 28, 9, 14, 2021
Japanese

ハイブリッド地中熱ヒートポンプシステムにおけるシミュレーションを応用した長期運用に関する研究
葛 隆生, 中村 靖, 長野 克則, 空気調和・衛生工学会論文集, 279, 1, 9, Jun. 2020, [Peer-reviewed]
Japanese

Calculation method of temperature response function of ground heat exchangers field with groundwater flow using artificial neural network regression model　　　　　　　　　　　　　　　
小司優陸, 葛隆生, 阪田義隆, 長野克則, 空気調和・衛生工学会論文集, 45, 279, 11, 18, Jun. 2020, [Peer-reviewed]

A study on 100y-after performance of ground-source heat pump systems in the Tokyo district
明山雄真, 阪田義隆, 葛隆生, 長野克則, 山本芳樹, 日本地熱学会学術講演会講演要旨集, 2020, 2020

Comparison of performances among adjacent ground heat exchangers through sequential temperature measurements in a long-distance optic fiber sensor
阪田義隆, 葛隆生, 長野克則, 大江基明, 日本地熱学会学術講演会講演要旨集, 2020, 2020

Measurement of Temperature and Humidity Distribution in Desiccant Rotor
鍋島 佑基, 松浦 大介, 木村 竜士, 長野 克則, 日本冷凍空調学会論文集 = Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers, 35, 3, 181, 191, 2018
日本冷凍空調学会, Japanese

蓄電池制御を伴うスマートエネルギーハウスの最適運用に関する研究
相澤峻, 小原伸哉, 佐藤克彰, 植村勇太, MOREL Jorge, 長野克則, 葛隆生, 阪田義隆, 空気調和・冷凍連合講演会講演論文集(CD-ROM), 51st, 153‐156, 17 Apr. 2017
Japanese

蓄電池制御を伴うスマートエネルギーハウスの最適運用に関する研究—Study on optimum operation of smart energy house with storage battery control
相澤 峻, 小原 伸哉, 佐藤 克彰, 植村 勇太, モレル ホルヘ, 長野 克則, 葛 隆生, 阪田 義隆, 空気調和・冷凍連合講演会講演論文集 Proceedings of Japanese Joint Conference on Air-conditioning and Refrigeration (Tokyo), 51, 153, 156, Apr. 2017
[日本冷凍空調学会], Japanese

地域資源を活用した再生可能エネルギー等の利活用技術の開発―施設園芸における熱エネルギーの効率的利用技術の開発―第1章 施設園芸における地中熱の効率的提供方法の開発 1 寒冷地園芸施設向けの低コストで実用的な地中熱提供方法の開発(1)寒冷地向けの園芸施設への地中熱採熱と供給性能評価
長野克則, 葛隆生, 中村真人, 八木裕紀子, 杉野堯子, 農林水産省農林水産技術会議事務局研究成果, 576, 14‐17, 31 Mar. 2017
Japanese

浅層土壌による螺旋状地中熱交換器の設計・性能予測手法 第2報 設計・性能予測手法の精度向上の検討と実導入事例との比較による精度検証
東谷貴, 葛隆生, 長野克則, 大江基明, 安江伸二, 赤井仁志, 赤井仁志, 空気調和・衛生工学会東北支部学術・技術報告会論文集, 6th, 69‐72, 72, 14 Mar. 2017
空気調和・衛生工学会東北支部, Japanese

浅層土壌による螺旋状地中熱交換器の設計・性能予測手法 第3報:設計・性能予測手法を用いた必要地中熱交換器本数の検討
葛隆生, 東谷貴, 長野克則, 赤井仁志, 赤井仁志, 奥野敏彦, 瀬川和幸, 山本昌志, 草刈洋行, 大江基明, 空気調和・衛生工学会東北支部学術・技術報告会論文集, 6th, 73‐76, 76, 14 Mar. 2017
空気調和・衛生工学会東北支部, Japanese

事務所建築での内部発熱の変化による空調負荷とヒートポンプへの影響
赤井仁志, 奥野敏彦, 瀬川和幸, 草刈洋行, 二宮秀與, 西山尚弘, 長野克則, 葛隆生, 空気調和・衛生工学会東北支部学術・技術報告会論文集, 6th, 45‐50, 50, 14 Mar. 2017
空気調和・衛生工学会東北支部, Japanese

524 Study on development of smart energy house operation optimal algorithm with battery control using bi-directional inverter
Shun Aizawa, Obara Shin'ya, Sato Katsuaki, Uemura Yuta, Morel Jorge, Nagano Katsunori, Katsu Takao, Sakata Yoshitaka, The Proceedings of Conference of Hokkaido Branch, 2017.55, 105, 106, 2017
The Japan Society of Mechanical Engineers, Japanese

Study on economical operation planning of the smart house using bi-directional inverter
AIZAWA Shun, OBARA Shin'ya, SATO Katsuaki, UEMURA Yuta, MOREL Jorge, NAGANO Katsunori, KATSU Takeo, SAKATA Yoshitaka, The Proceedings of the National Symposium on Power and Energy Systems, 2017.22, C123, 2017
Introduction of the renewable energy and energy-saving technologies that contribute to reducing environmental impact, this research have focused on smart house systems. There is few research on the economics of smart houses involving storage batteries, and the optimal operation method of a battery introduced into an individual houses based on economical efficiency is not clear. Therefore, in this research, the authors try to optimize operation method of storage battery on an individual house of one day by bi-directional inverter for smart house system. In the proposed system, purchase from the commercial power system is minimized by optimal operation of the bi-directional inverter on the predicted data of the energy balance and solar radiation amount of the next day. In addition, surplus electric power obtained by solar power generation is sold to electric power company. The proposed system consists of solar cells, storage battery, bi-directional inverters and simulated load. A bi-directional inverter optimization algorithm is installed into the controller of the proposed system. The operation of the controller is optimized by the genetic algorithm (GA), and the objective function gives the minimization of the amount of purchase electric power per one day., The Japan Society of Mechanical Engineers, Japanese

Study on optimum operation of smart house with storage battery prediction control
AIZAWA Shun, OBARA Shin'ya, SATO Katsuaki, UEMURA Yuta, MOREL Jorge, NAGANO Katsunori, KATSU Takeo, SAKATA Yoshitaka, The Proceedings of the Symposium on Environmental Engineering, 2017.27, 401, 2017
In this research, the authors try to optimize operation method of storage battery on an individual house of one day by bi-directional inverter for smart house system. In the proposed system, purchase from the commercial power system is minimized by optimal operation of the bi-directional inverter on the predicted data of the energy balance and solar radiation amount of the next day. In addition, surplus electric power obtained by solar power generation is sold to electric power company. The proposed system consists of solar cells, storage battery, bi-directional inverters and simulated load. A bi-directional inverter optimization algorithm is installed into the controller of the proposed system. The operation of the controller is optimized by the genetic algorithm (GA), and the objective function gives the minimization of the amount of purchase electric power per one day. As a result, compared to the conventional method (when the proposed system is not introduced), the purchase amount was reduced by 16.4%, 33.2%, and 13.7% in January, April and July. In addition, the electricity charges were reduced by 32.4%, 44.6%, and 56.1% in January, April and July., The Japan Society of Mechanical Engineers, Japanese

Investigation of a Design and Operation Method for a Heat Recovery Ground Source Heat Pump System
Takao Katsura, Katsunori Nagano, Yasushi Nakamura, 2017 ASHRAE ANNUAL CONFERENCE PAPERS, 2017
A method for the design and operation of a heat-recovery ground-source heat pump (HR-GSHP) system has been investigated. In this paper, a design method for the HR-GSHP system by applying the optimization method was first introduced. By applying the design method, the total heating and cooling loads of each ground-source heat pump (GSHP) unit in the HR-GSHP system were maximized in response to an arbitrarily set total length of the ground heat exchanger (GHEX). This means that the HR-GSHP system designed with the design method could yield the maximum energy saving effect for a given GHEX total length. Next, it was assumed that the HR-GSHP system with a 7,200-m total GHEX borehole length was installed in a large scale complex building, which required both heating and cooling at the same time throughout the year, and the hourly heating and cooling loads of each GSHP unit was determined using the design method. As a result, it was confirmed that the HR-GSHP could cover approximately 4.3 times the heat load of a conventional GSHP system. In addition, the simulation of annual HR-GSHP system operation was performed using the design and performance prediction tool for the GSHP system. The hourly heat load determined by the design method was given in the simulation. The average coefficients of performance (COP) for the HR-GSHP system were 4.6 for heating and 10.3 for cooling. Thus, the HR-GSHP system was advantageous in not only the amount of heat load that could be covered but also the COP compared to the conventional GSHP system., AMER SOC HEATING, REFRIGERATING AND AIR-CONDITIONING ENGS, English

Study on Adsorption Heat Pump using Natural Mesoporous Material(6th report)Development of numerical analysis program and prediction of 10 kW AHP
井上 真由, 小牧 あゆみ, 長野 克則, 外川 純也, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, B133, 1-6, 2017
日本冷凍空調学会, Japanese

Study on Adsorption Heat Pump using Natural Mesoporous Material(5th Report)Development of 1kW Laboratory Scale AHP and Evaluation of Cooling Ability
大前 青也, 松本 拓也, 外川 純也, 黒石 広明, 村上 真一, 原田 克彦, 長野 克則, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, B132, 1-4, 2017
日本冷凍空調学会, Japanese

Study on Adsorption Heat Pump using Natural Mesoporous Material(4th Report)Evaluation of Cooling Ability using Small-Size Heat Exchanger with Adsorbent
外川 純也, 黒川 麻美, 中村 真人, 長野 克則, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, B131, 1-4, 2017
日本冷凍空調学会, Japanese

Trial production of slim and translucent vacuum insulation panels and discussion on the insulation performance
相原 昌博, 葛 隆生, 楊 樟, 中村 真人, 長野 克則, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, B334, 1-4, 2017
日本冷凍空調学会, Japanese

Design methodology for ground source heat pump system considering multiple geological layers with ground water flow
葛 隆生, 蔡 浩秉, 阪田 義隆, 中村 真人, 長野 克則, 大嶋 邦彦, 佐々木 雅宏, 近藤 武士, 久保 隆太郎, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, F111, 1-6, 2017
日本冷凍空調学会, Japanese

Improvement of the Simulation Model for the Vertical Spiral Ground Heat Exchanger and Comparing with the Field Measurement
東谷 貴, 葛 隆生, 長野 克則, 赤井 仁志, 大江 基明, 瀬川 和幸, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, F112, 1-6, 2017
日本冷凍空調学会, Japanese

REGIONAL EFFICIENCY ANALYSIS OF GROUND SOURCE HEAT PUMP SYSTEMS WITH GEO-PROPERTY DATABASE
阪田 義隆, 葛 隆生, 長野 克則, 地球環境研究論文集 = Global environment engineering research : 地球環境シンポジウム, 25, 89, 98, 2017
土木学会, Japanese

Pre-heating Operation for Packaged Air-conditioners
吉田 康孝, 長野 克則, 戸草 健治, 日本冷凍空調学会論文集 = Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers, 34, 1, 1, 11, 2017
日本冷凍空調学会, Japanese

A STUDY ON ENERGY PERFORMANCE OF HYBRID GEOTHERMAL-SOLAR ENERGY SYSTEM
瀧ヶ崎 薫, 長野 克則, 前田建設技術研究所報 Maeda Corporation report of Technical Research Institute, 58, 9p, 2017
前田建設工業, Japanese

寒冷地におけるネット・ゼロ・エネルギービルの構築に関する研究 その4 積雪寒冷地に建設された地中熱ヒートポンプ暖房システムを採用したローエネルギー子どもセンターの年間の実測評価
廣内優, 井島拓也, 中村真人, 長野克則, 松下靖彦, 佐藤全弘, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, 2017

Thermal comfort improvement effect of the WSS desiccant system
土井 隆, 鍋島 佑基, 外川 純也, 長野 克則, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, E322, 1-6, 2017
日本冷凍空調学会, Japanese

地中熱ヒートポンプを核としたスマートコミュニティに関する研究 その2 スマートハウスにおける太陽光発電連携型リチウムイオン蓄電池の充放電の最適化に関する検討
中島彰栄, 長野克則, 葛隆生, 中村真人, 阪田義隆, 小原伸哉, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, ROMBUNNO.E‐1, 2017
Japanese

地下水流れが存在する地層に埋設された垂直ボアボール型地中熱交換器の熱応答試験
CHAE Hobyung, 中村真人, 阪田義隆, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, ROMBUNNO.E‐5, 2017
Japanese

ZEHにおける蓄熱・蓄電最適制御による購入電力の最適化
杉野堯子, 長野克則, 葛隆生, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, ROMBUNNO.A‐3, 2017
Japanese

地中熱ヒートポンプシステム設計・性能予測ツールにおける地中温度計算の高速化・高精度化に関する検討
葛隆生, 東谷貴, 阪田義隆, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, ROMBUNNO.F‐3, 2017
Japanese

地中熱熱回収ヒートポンプシステムの設計手法と最適制御システムの開発に関する研究(その5)フィールド試験による制御システムの検証
宮下佳樹, 葛隆生, 中村靖, NGUYEN Hai Dang, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, ROMBUNNO.EP‐1, 2017
Japanese

地中熱源ヒートポンプユニットの高性能化に関する検討 その1 冷房運転時における性能評価と熱交換器形状の影響評価
浜野一真, 久保憲人, 葛隆生, 長野克則, 久保田康幹, 岡本淳, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, ROMBUNNO.EP‐4(EP‐1), 2017
Japanese

地中熱源ヒートポンプユニットの高性能化に関する検討 その2 給湯専用機における内部熱交換器の導入効果検討
久保憲人, 濱野一真, 葛隆生, 長野克則, 久保田康幹, 岡本淳, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, ROMBUNNO.E‐4, 2017
Japanese

寒冷地におけるネット・ゼロ・エネルギービルの構築に関する研究 その5 地中熱暖房システムの多目的最適化を図った運用計画
井島拓也, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, ROMBUNNO.A‐4, 2017
Japanese

地盤・地下水データベースに基づく地中熱利用ポテンシャルマップと設計性能予測ツールの開発 その3:地質区分の予測分布確率を用いた熱・水理物性値の推定
阪田義隆, 橋本隼樹, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, ROMBUNNO.E‐2, 2017
Japanese

地中熱熱回収ヒートポンプシステムの設計手法と最適制御システムの開発に関する研究(その4)最適化手法を応用した地中熱熱回収ヒートポンプシステムの設計手法の確立
NGUYEN Hai Dang, 葛隆生, 中村靖, 宮下佳樹, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, ROMBUNNO.E‐3, 2017
Japanese

地中熱ヒートポンプを核としたスマートコミュニティに関する研究 その1 スマートハウス実証実験施設の構築
村上友章, 長野克則, 葛隆生, 阪田義孝, 中村真人, 小原伸哉, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, ROMBUNNO.EP‐2, 2017
Japanese

既存建築物の高断熱化に寄与する真空断熱材の検討および性能評価試験
相原昌博, 葛隆生, YANG Zhang, 中村真人, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, ROMBUNNO.BP‐4, 2017
Japanese

地中熱源ヒートポンプユニットの高性能化に関する検討 その3 冷暖房給湯一体機の性能評価とライフサイクルコストによる導入可能性の検討
久保憲人, 濱野一真, 葛隆生, 長野克則, 久保田康幹, 岡本淳, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, ROMBUNNO.EP‐5, 2017
Japanese

地盤・地下水データベースに基づく地中熱利用ポテンシャルマップと設計性能予測ツールの開発 その4:ポテンシャルマップを用いたGSHPs導入適地の地域評価分析
橋本隼樹, 阪田義隆, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, ROMBUNNO.EP‐3, 2017
Japanese

寒冷地におけるネット・ゼロ・エネルギービルの構築に関する研究 その6 エネルギー需給システムの統合的運用の最適化
井島拓也, 中島彰栄, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 51st, ROMBUNNO.AP‐3, 2017
Japanese

るすつ子どもセンター「ぽっけ」＜再生可能エネルギー熱の多面的利用による積雪寒冷地のローエネルギー子育て施設＞　　　　　　　　　　　　　　　
長野克則, 建築設備と配管工事, 55, 12, 67, 73, 2017
Japanese

内部発熱の減少が熱負荷とヒートポンプ電力消費量に与える影響
赤井仁志, 草刈洋行, 奥野敏彦, 山田俊郎, 大子田誠也, 瀬川和幸, 二宮秀與, 西山尚弘, 長野克則, 葛隆生, 電気設備学会全国大会講演論文集, 34th, 154‐159, 01 Aug. 2016
Japanese

垂直埋設型スパイラル地中熱交換器を用いた浅層地中熱利用ヒートポンプシステムに関する研究 その2 戸建て住宅へのスパイラル地中熱交換器を用いた地中熱ヒートポンプシステムの導入可能性検討
NGUYEN Hai Dang, 葛隆生, 長野克則, 赤井仁志, 赤井仁志, 大江基明, 日本建築学会大会学術講演梗概集・建築デザイン発表梗概集(CD-ROM), 2016, ROMBUNNO.41662, 20 Jul. 2016
Japanese

垂直埋設スパイラル地中熱交換器を用いた浅層地中熱利用ヒートポンプシステムに関する研究 その1 熱回路網を応用したスパイラル地中熱交換器の計算モデルの概要と検証
葛隆生, NGUYEN Hai Dang, 長野克則, 赤井仁志, 赤井仁志, 大江基明, 日本建築学会大会学術講演梗概集・建築デザイン発表梗概集(CD-ROM), 2016, ROMBUNNO.41661, 20 Jul. 2016
Japanese

浅層土壌による螺旋状地中熱交換器の埋設工法の開発と評価 その1:開発の背景・目的と当初の実証試験計画・結果
赤井仁志, 草刈洋行, 長野克則, 葛隆生, 空気調和・衛生工学会東北支部学術・技術報告会論文集, 5th, 61‐66, 66, 11 Mar. 2016
空気調和・衛生工学会東北支部, Japanese

浅層土壌による螺旋状地中熱交換器の設計・性能予測手法
葛隆生, NGUYEN Hai Dang, 長野克則, 赤井仁志, 赤井仁志, 草刈洋行, 空気調和・衛生工学会東北支部学術・技術報告会論文集, 5th, 57‐60, 60, 11 Mar. 2016
空気調和・衛生工学会東北支部, Japanese

浅層土壌による螺旋状地中熱交換器の埋設工法の開発と評価 その2:改良後の実証試験計画・結果
瀬川和幸, 奥野敏彦, 山田俊郎, 大子田誠也, 赤井仁志, 草刈洋行, 長野克則, 葛隆生, 空気調和・衛生工学会東北支部学術・技術報告会論文集, 5th, 67‐68, 11 Mar. 2016
Japanese

R&D of compact and high performance desiccant ventilation units : Application of Wakkanai siliceous shale as a natural meso-porous material
長野 克則, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, D323, 1-6, 2016
日本冷凍空調学会, Japanese

Study on Adsorption Heat Pump using Natural Mesoporous Material(3rd Report)development of the heat exchanger with adsorbent and evaluation of the cooling ability
外川 純也, 森田 敦, 中村 真人, 長野 克則, 松本 拓也, 大前 青也, 黒石 広明, 原田 克彦, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, D212, 1-4, 2016
日本冷凍空調学会, Japanese

Development of Desiccant Air Conditioning System using Wakkanai Siliceous Shale(Part 24)Summer period performance evaluation of a detached house with a retrofitted ground source free cooling and desiccant ventilation unit in Hokkaido
佐藤 怜央, 長野 克則, 中村 真人, 小椋 凌, 鍋島 佑基, 青木 智恵美, 仁木 康介, 古川 修, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, D111, 1-6, 2016
日本冷凍空調学会, Japanese

Development of Desiccant Air Conditioning System using Wakkanai Siliceous Shale(Part 27)Experimental study of the effect of a purge zone
鍋島 佑基, 長野 克則, 青木 智恵美, 中島 敏充, 仁木 康介, 外川 純也, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, D114, 1-6, 2016
日本冷凍空調学会, Japanese

Development of Desiccant Air Conditioning System using Wakkanai Siliceous Shale(Part 26)Summer period performance evaluation of retrofitted desiccant ventilation unit by MATLAB modeling
小椋 凌, 佐藤 怜央, 長野 克則, 中村 真人, 鍋島 佑基, 青木 智恵美, 仁木 康介, 古川 修, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, D113, 1-6, 2016
日本冷凍空調学会, Japanese

Investigation of indoor air quality and energy consumption of the underground shopping mall in Sapporo
姜 允敬, 長野 克則, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2016, 37, 40, 2016

The microbial contamination in the ventilation system and the indoor air quality were evaluated in the underground shopping mall, Sapporo. The energy consumption of the shopping mall was investigated for five years from 2010 to 2014. Airborne microbial contaminations in the shopping mall were measured during summer and winter on weekdays and weekend-days. Species of the airborne bacteria was identified by the 16S rDNA sequence analysis.

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Technical Development of Vertical Type Spiral Ground Heat Exchanger Buried in Shallow Layer, Part 1: Purpose of Technical Development, Phase 1 and Phase 2 Demonstration Experiment
赤井 仁志, 葛 隆生, 長野 克則, 草刈 洋行, 奥野 敏彦, 瀬川 和幸, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2016, 193, 196, 2016

本報は、配電工事用建柱車を使って、浅層部の土壌に螺旋状地中熱交換器を埋設する工法の実証試験や性能評価である。フェーズ1では、換気用の円筒形ダクトのまわりにステンレス鋼フレキシブル管やアルミ三層管を巻いた地中熱交換器を利用した。フェーズ2では、換気用の円筒形ダクトを使用せず、アルミ三層管だけで地中熱交換器とした。

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Study on Designing of Net-Zero Energy Building in Cold Regions
井島 拓也, 長野 克則, 葛 隆生, 中村 真人, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2016, 249, 252, 2016

本報は寒冷地における地中熱利用を核としたネットゼロエネルギービルの構築を目的とした研究1)の第2報である。本報では、対象建物に導入された地中熱暖房システムの性能を実測とシミュレーションを行い検証する。

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Study on Hybrid Geothermal-Solar Energy System Part 2 System Simulation Results
瀧ヶ崎 薫, 長野 克則, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2016, 121, 124, 2016

本報では実建物に導入した地中熱・太陽熱複合空調システムの実測結果を基にシステムシミュレーションを行い、実測結果と比較するとともに地中熱・太陽熱複合空調システムの省エネ性能について報告した。

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

稚内珪質頁岩を用いたデシカント空調システムにおけるローター及びエレメントの汚染質移行特性評価
小牧 あゆみ, 長野 克則, 中村 真人, 外川 純也, 鍋島 佑基, 空気調和・衛生工学会大会 学術講演論文集, 2016, 153, 156, 2016

著者らは、稚内層珪質頁岩を用いたデシカントローター（WSSローター）と対向流型全熱交換素子を組み合わせた低温再生可能なデシカント空調システムの開発を行ってきた。省エネルギー性は明らかになったが、デシカント空調システムでは還気(RA)から取り込まれた室内汚染物質が給気(SA)に移行するリスクがある．そこで，実運転に近い通気型試験を行うことで、換気ユニットに搭載する全熱交換素子とローターにおけるCO2、VOC、アンモニアの臭気移行評価を個別に行った。

, 公益社団法人 空気調和・衛生工学会, Japanese

Experimental Evaluations of Building Surface and Indoor Temperature Reducing Effect of the Thermal Insulation Coatings
TAZIA Rahman, NAGANO Katsunori, NAKAMURA Makoto, TOGAWA Junya, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2016, 77, 80, 2016

This paper presents a comparative study on thermal insulation coatings and their effect on lowering building surface and indoor temperatures. Eight reflective coatings, Wakkanai Siliceous Shale (WSS) mortar and particle coated and an uncoated concrete blocks were experimented in steady state and periodic tests.This study can support in choosing more appropriate coatings for building envelopes and contribute to the reduction of heat island effect.

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

寒冷地園芸施設向けの低コストで実用的な地中熱提供方法の開発 その4 地中熱ヒートポンプ加温・冷却システムの性能および地中温度の経年変化の評価
杉野 堯子, 長野 克則, 葛 隆生, 中村 真人, 空気調和・衛生工学会大会 学術講演論文集, 2016, 125, 128, 2016

本報は，北海道を含む寒冷地の園芸施設に適する低コストで実用的な地中熱提供方法を提示することを目的とした研究の第4報である．これまでは，寒冷地園芸用施設に導入した地中熱ヒートポンプシステムの概要及び1〜2年目の稼働状況,熱交換器ごとの比較・評価について報告した．本報では3年目の地中熱ヒートポンプの加温システムの加温・冷却（フリークーリング）システムの性能評価，地中温度の推移・回復状況について報告する．

, 公益社団法人 空気調和・衛生工学会, Japanese

Study on the Installation Effect of Ground Source Heat Pump System by Annual Performance Prediction Tool
NGUYEN HAIDANG, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2016, 141, 144, 2016

本研究では、冷凍サイクルを考慮したヒートポンプシステム性能予測ツールのヒートポンプ熱源機の計算モデルと、これまでに筆者らが開発してきたGSHPシステム設計・性能予測ツール(ツール名Ground Club)の地中熱交換器の計算モデルを組み合わせることで、地中熱ヒートポンプシステムの熱源としての優位性を年間の省エネルギー効果に反映させることを目的とする。

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

An efficient method to determine borehole heat exchangers for ground source heat pump systems with three-dimensional geologic and hydrogeologic database
橋本 隼樹, 阪田 義隆, 葛 隆生, 長野 克則, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2016, 137, 140, 2016

本報では，三次元地盤・地下水データベースを用いて、地中熱利用ヒートポンプシステムの地中熱交換器の規模を効率的に検討する手法を提案する。データベースの任意点の地質の深度分布を有効熱伝導率分布に変換する。WebGroundClubによるシミュレーションから、有効熱伝導率の違いによるCOPと地中熱交換器長さや本数との関係を得る。これらを組み合わせることで、任意点の地中熱交換器規模を効率的に推定できる。札幌への適用事例では、扇状地中央で住宅で１００~１５０m、事務所で３２~３４本程度という試算結果が得られた。

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Study on Stationary Total Heat Exchange System Focused on the Element Proposal of the new method of odor migration assessment
鈴木 崚太, 長野 克則, 外川 純也, 鍋島 佑基, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2015, 9, 13, 2016

室内空気質の保持と省エネルギー性の向上を目的として静止型全熱交換換気システムが導入されている。静止型全熱交換器の熱交換素子には、高い水蒸気透過性能と室内汚染物質に対するガスバリア性が必要とされている。本報では全熱交換素子として用いられているビスコース加工紙と、高い透湿性能を持つ種々の透湿膜の透湿性能と臭気物質の移行性について評価を行った。また、試験の安定性の向上を目的として新たな臭気移行試験の装置を提案した。

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Evaluation of energy consumption and airborne microbes of underground walkway in Sapporo
姜 允敬, 長野 克則, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2015, 113, 117, 2016

The microbial contamination in the ventilation system and the indoor air quality were evaluated in the Sapporo underground walkway, Hokkaido. The energy consumption of the underground walkway was investigated for four years from its opening in 2011 until 2014. Airborne microbial contaminations in the underground walkway were measured in the summer and in the winter on weekdays and weekend-days.

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

The assessment of microbial contamination on energy recovery ventilation devices of a residential building in Sapporo
姜 允敬, 長野 克則, 中村 真人, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2014, 109, 112, 2016

本研究では、アースチューブと全熱交換素子が設置されている住宅の微生物による汚染に関して評価方法を提案することを目的とする。アースチューブと全熱交換素子が設置されている札幌市の住宅を対象とし、実測により室内空気質および換気装置での微生物汚染評価を行う。アースチューブと全熱交換素子の微生物汚染を評価するため、室内、室内の給気口とアースチューブの吹き出し空気、外気の浮遊細菌と真菌の濃度を測定した。

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Development of Practical Low Cost Ground Source Heat Pump System for Cold Area Greenhouse , Field Test Result and Annual Performance Prediction
長野 克則, 中村 真人, 八木 裕紀子, 森 祐輝, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2014, 45, 48, 2016

北海道を含む寒冷地の園芸施設に適する低コストで実用的な地中熱提供方法を提示することを目的とした研究を行った.寒冷地における園芸用施設に適用した水平埋設採熱方式によるGSHPシステムの導入プロジェクトにおいて,地中熱ヒートポンプユニットを導入したフィールド試験の実測結果と,数値解析による年間性能予測について報告する.

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Study on Experiment and Simulation of Efficiency Improvement of Domestic Ground Source Heat Pump Part.2 Annual Simulation by the Performance Analysis
森 祐輝, 長野 克則, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2014, 237, 240, 2016

In this paper, the annual effectiveness of improved heat pump simulation is done. As a result, the efficiency of the improved heat pump is achieved. Comparison with the normal heat pump, the improved heat pump is higher performance at all conditions.

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Study on the designing Ground Source Heat Pump system for the residential house in moderate climate region
NGUYEN HAI DANG, 葛 隆生, 長野 克則, 成田 樹昭, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2015, 97, 101, 2016

本報では、温暖地において室温の確保と高効率化を両立できる地中熱ヒートポンプ(以下にGSHP)システムを確立することを目的とし、二次側の設計を行ったGSHPシステムを導入し、室温とGSHPシステムの実測を行った。また汎用の負荷計算ソフトを用いて、空調スケジュールやGSHPシステムの導入対象空間を変更した場合の地中熱交換器の必要長さの検討も行った。最後に、GSHPシステムのライフサイクルコストの計算を行い、導入拡大のための今後の課題を明らかとする。

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Development of low cost & high efficiency GSHP system and its design & evaluation method Part-3 Construction of geologic and hydrologic database for mapping potential of subsurface geothermal use
阪田 義隆, 長野 克則, 葛 隆生, 中村 真人, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2015, 93, 97, 2016

本研究では．地中熱利用ポテンシャルマップのための，地盤・地下水情報データベースを構築すべく，既存井戸情報を用いたクリギング内挿手法を応用した手法を考案し，任意地点の地盤情報を効率的に推定できることを示した．また,その妥当性を確認する交差検証法の結果を紹介した．また光ファイバーによる温度プロファイルを用いた複層地盤における熱応答試験の簡易解析法を示し，実データへの適用事例から，その有効性を示した．

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Study on the design and development of evaluation method of low cost & high efficiency GSHP Part 2 Discussion on improvement of Ground Source Heat Pump for heating
久保 憲人, 長野 克則, 葛 隆生, 中村 真人, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2015, 89, 93, 2016

近年、再生可能エネルギーへの期待が高まっているが、依然高額な初期コストの影響で地中熱ヒートポンプシステムの導入が遅れている。そのため、普及させるために、低コストかつ高効率な機器を供給することが急務となっている。そこで、本研究では、地中熱ヒートポンプユニット高効率化のため、液ガス熱交換器とガスインジェクションを導入し、その効果を検討する。また、数値計算より1次側の不凍液循環ポンプを温度差一定流量可変式で制御し、SCOPの向上を検討する。

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Development of low cost & high efficiency GSHP system and its design & evaluation method Part 1 Outline of the research project and first year's achievement
葛 隆生, 長野 克則, 阪田 義隆, 中村 真人, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2015, 85, 89, 2016

本稿では、NEDOの「再生可能エネルギー熱利用技術開発」事業、「低コスト・高効率を実現する間接型地中熱ヒートポンプシステムの開発と地理地盤情報を利用した設計・性能予測シミュレーションツール・ポテンシャル評価システムの開発」について、開発のコンセプトと内容について概説する。また、プロジェクト1年目の研究成果について紹介し、さらに、この研究成果を含めた、地中熱ヒートポンプシステム設計・性能予測ツールの高度化の実施概要について紹介する。

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Study on Hybrid Geothermal-Solar Energy System Part 1 Measurement Results in Heating Season
瀧ヶ崎 薫, 長野 克則, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2015, 21, 25, 2016

本報では実建物に導入した地中熱・太陽熱複合空調システムの概要ならびに暖房時における実測結果について報告した。 太陽熱集熱量に応じて、地中採熱量は減少、熱源水温度と地中温度およびCOPは上昇する。余剰な太陽熱が地中に蓄熱されることを確認できた。

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Evaluation of Odor Transfer Properties of the Desiccant Air Conditioning System using Wakkanai Siliceous Shale
小牧 あゆみ, 鈴木 崚太, 中村 真人, 外川 純也, 鍋島 佑基, 長野 克則, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2015, 133, 137, 2016

潜熱顕熱分離空調であるデシカント空調システムでは室内で発生した臭気が供給空気に移行する可能性がある。そこで、稚内珪質頁岩を使用したデシカントローターと全熱交換器を搭載したデシカント空調システムにおいて、それぞれ臭気移行特性の評価を行った。臭気物質には二酸化炭素、トルエン、アンモニアを用いて実験を行った。

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Development of Practical Low Cost Ground Source Heat Pump System for Cold Area Greenhouse Part 2 Performance Comparison of Ground Source Heat Pump System in winter and Ground Heat Exchanger
八木 裕紀子, 杉野 堯子, 長野 克則, 中村 真人, 葛 隆生, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2015, 69, 73, 2016

本報は，北海道を含む寒冷地の園芸施設に適する低コストで実用的な地中熱提供方法を提示することを目的とした研究の第2報である．その1では，寒冷地園芸用施設に導入した地中熱ヒートポンプシステムの概要及び1年目の稼働状況について報告した．本報では地中熱ヒートポンプの加温システムの性能評価，地中熱交換器の性能評価，地中温度の変化について報告する．

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Development of Practical Low Cost Ground Source Heat Pump System for Cold Area Greenhouse Part3 Verification of simulation by comparison of actual measurement result and its application
杉野 堯子, 八木 裕紀子, 長野 克則, 中村 真人, 葛 隆生, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2015, 73, 77, 2016

本報は、北海道を含む寒冷地の園芸施設に適する低コストで実用的な地中熱提供方法を提示することを目的とした一連の研究の第3 報である。本報では、まず温室を透過する日射量や、断熱性能の分析を、実測結果を用いて行った。次に既報において紹介したシミュレーションツールの検証を行った。さらには、新たに導入したヒートポンプや地中熱交換器の性能を考慮したシミュレーションを、ツールを用いて行い本システムの導入可能性を検討した。

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Study on Stationary Total Heat Exchange System Focused on the Element
鈴木 崚太, 長野 克則, 中村 真人, 外川 純也, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2014, 17, 20, 2016

本研究では,静止型全熱交換換気システムの熱交換素子に着目し、素子として適応可能な種々の透湿膜の透湿性能を同一の基準によって新たに評価した。また、水蒸気が透湿膜を透過する際に、周囲の気流がどのような影響を及ぼすか検討するために試験装置を作成し強制対流下条件における評価を行った。さらに全熱交換エレメントの顕熱交換効率、潜熱交換効率を測定し、風量及び水蒸気交換量の関係について明らかにした。

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Research of Energy Balance of Low Energy House in Extreme Cold District Study on Net-Zero Energy House by Simulation
瀧上 采香, 長野 克則, 中村 真人, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 2014, 181, 184, 2016

本研究の目的は、ネットゼロエネルギーハウスを建築する際にどのような住宅仕様と設備仕様が求められるのかを検討することである。本研究では、極寒冷地である喜茂別町に建築されたニアネットゼロエネルギーハウスにおいて実測を行いエネルギー収支の解析を行った。そして、実測結果を踏まえ、住宅性能予測ツールを用いて年間シミュレーションを行い、ライフサイクルコスト計算を通じて、寒冷地におけるネットゼロエネルギーハウスの実現可能性を探った。

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

Development of Desiccant Air Conditioning System using Wakkanai Siliceous Shale(Part 25)Experimental Study of Chemicals Transfer from RA to SA in Desiccant rotor
青木 智恵美, 長野 克則, 中村 真人, 外川 純也, 宮脇 さくら, 脇坂 聖, 小牧 あゆみ, 鍋島 佑基, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, D112, 1-6, 2016
日本冷凍空調学会, Japanese

寒冷地園芸施設向けの低コストで実用的な地中熱提供方法の開発 その6 地中熱ヒートポンプ加温・冷却システムの性能および地中温度の経年変化の評価
杉野堯子, 八木裕紀子, 長野克則, 中村真人, 葛隆生, 岡本淳, 多田梨恵, 生方雅男, 和田弘志, 井上行雄, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 50th, ROMBUNNO.EP‐3, 2016
Japanese

既存建築の高断熱化に寄与する光透過型真空断熱材・薄型真空断熱材の検討
村上友章, 葛隆生, YANG Zhang, 中村真人, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 50th, ROMBUNNO.BP‐5, 1-4, 2016
日本冷凍空調学会, Japanese

地中熱ヒートポンプシステムの低コスト・高効率化と設計・評価手法の開発に関する研究 その11 給湯用地中熱源ヒートポンプの性能向上に関する実験的検討
久保憲人, ZHENG Yu, LIU Hongzhi, 葛隆生, 長野克則, 久保田康幹, 岡本淳, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 50th, ROMBUNNO.E‐3, 2016
Japanese

垂直埋設型スパイラル地中熱交換器の採放熱性能評価に関する研究(第2報)熱回路網を応用したスパイラル地中熱交換器の計算モデルの概要と検証
瀧上采香, 葛隆生, 長野克則, 赤井仁志, 草刈洋行, 大江基明, 安江伸二, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 50th, ROMBUNNO.E‐7, 2016
Japanese

地中熱熱回収ヒートポンプシステムの設計手法と最適制御システムの開発に関する研究(その3)導入効果を考慮した地中熱熱回収ヒートポンプシステムの設計手法の確立
NGUYEN Hai Dang, 葛隆生, 宮下佳樹, 長野克則, 中村靖, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 50th, ROMBUNNO.E‐5, 1-6, 2016
日本冷凍空調学会, Japanese

地盤・地下水データベースに基づく地中熱利用ポテンシャルマップと設計性能予測ツールの開発 その2:地域・地盤・建物条件と地中熱交換器規模の関係性の分析
橋本隼樹, 阪田義隆, 長野克則, 葛隆生, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 50th, ROMBUNNO.EP‐1, 2016
Japanese

寒冷地におけるネット・ゼロ・エネルギービルの構築に関する研究 その3 ローエネルギー子どもセンターにおける地中熱暖房システムの性能評価
井島拓也, 廣内優, 葛隆生, 中村真人, 長野克則, 堀井淳史, 松下靖彦, 佐藤全弘, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 50th, ROMBUNNO.AP‐4, 2016
Japanese

垂直埋設型スパイラル地中熱交換器の採放熱性能評価に関する研究(第3報)戸建て住宅へのスパイラル地中熱交換器を用いた地中熱ヒートポンプシステムの導入可能性検討
瀧上采香, 葛隆生, 長野克則, 赤井仁志, 草刈洋行, 大江基明, 安江伸二, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 50th, ROMBUNNO.EP‐4, 2016
Japanese

地盤・地下水データベースに基づく地中熱利用ポテンシャルマップと設計性能予測ツールの開発 その1:3次元地質情報の推定手法及びデータベースの構築
阪田義隆, 橋本隼樹, 葛隆生, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 50th, ROMBUNNO.E‐1, 2016
Japanese

地中熱とヒートポンプ・蓄熱・蓄電を利用したスマートコミュニティに関する検討
八木裕紀子, 長野克則, 葛隆生, 小原伸哉, JORGE Morel, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 50th, ROMBUNNO.E‐6, 248, 2016

建物のエネルギー消費量の半分以上が冷暖房・給湯といった熱エネルギーであることを考慮すると,地中熱やヒートポンプ(HP)を利用した熱の相互融通を行うスマートコミュニティは大変有効である.熱負荷パターンの異なる建物をボアホールや短期蓄熱層を用いて一つの熱源ネットワークとすることにより,相互間で熱融通を行いエネルギーを無駄なく利用できるシステムを想定し,これらの足掛かりとして住宅における冷暖房と給湯の熱融通システムを開発し検討を行った.

, The Society of Heating,Air-Conditioning&Sanitary Engineers of Japan, Japanese

地中熱熱回収ヒートポンプシステムの設計手法と最適制御システムの開発に関する研究 その1 地中熱熱回収ヒートポンプシステムの最適制御システムとフィールド試験の概要
葛隆生, 中村靖, NGUYEN Hai Dang, 宮下佳樹, 長野克則, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 50th, ROMBUNNO.E‐4, 2016
Japanese

既存建築の高断熱化に寄与する薄型・透明真空断熱材の開発に関する研究
村上友章, 葛隆生, YANG Zhang, 長野克則, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2016, ROMBUNNO.B223, 1-4, 2016
日本冷凍空調学会, Japanese

地中熱利用熱回収ヒートポンプシステムの最適設計手法の開発に関する研究
宮下佳樹, 葛隆生, NGUYEN Hai Dang, 長野克則, 中村靖, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2016, ROMBUNNO.E123, 1-6, 2016
日本冷凍空調学会, Japanese

全国地中熱利用ポテンシャルマッピングに向けた取り組み:その1 井戸データベースを用いた地盤情報推定システムの開発
阪田義隆, 橋本隼樹, 松浦恭介, 長野克則, 葛隆生, 丸井敦尚, 日本地下水学会講演会講演予稿, 2016, 28‐31, 2016
Japanese

垂直スパイラル型地中熱交換器を用いた浅層地中熱ヒートポンプシステムの設計・性能予測ツールの開発とその応用
葛隆生, 長野克則, NGUYEN Hai Dang, 赤井仁志, 大江基明, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2016, ROMBUNNO.E121, 1-6, 2016
日本冷凍空調学会, Japanese

地中熱ヒートポンプシステムの低コスト・高効率化と設計・評価手法の開発に関する研究 その12:給湯用地中熱源ヒートポンプの高効率化の実験的検討
久保憲人, LIU Honzhi, 長野克則, 葛隆生, 中村真人, 久保田康幹, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2016, ROMBUNNO.B114, 1-4, 2016
日本冷凍空調学会, Japanese

全国地中熱利用ポテンシャルマッピングに向けた取り組み:その3 地盤情報推定と地中熱設計シミュレーションが可能なWebシステムの開発
松浦恭介, 阪田義隆, 橋本隼樹, 長野克則, 葛隆生, 丸井敦尚, 日本地下水学会講演会講演予稿, 2016, 250‐253, 2016
Japanese

農業電化協会 北海道地区 寒冷地園芸施設向けの低コストで実用的な地中熱ヒートポンプシステムの最適化検討と地中熱ヒートポンプ加温・冷却によるアリストロメリア栽培結果 (第52回農業電化研究会)
長野 克則, 農業電化, 68, 6, 1, 8, Nov. 2015
農業電化協会, Japanese

41416 The assessment of microbial contamination on energy recovery ventilation devices of a residential building in Kimobetsu-cho, Hokkaido
KANG Yoonkyung, NAGANO Katsunori, Summaries of technical papers of annual meeting, 2015, 869, 870, 04 Sep. 2015
Architectural Institute of Japan, Japanese

Recent Status of GSHPs in Hokkaido
長野 克則, 冷凍, 90, 1055, 672, 676, Sep. 2015
日本冷凍空調学会, Japanese

Development of low cost & high efficiency ground source heat pump system and its design & evaluation method(Part-2)Design and performance prediction tool for GSHP system utilizing geographic & geological information
葛 隆生, 長野 克則, 柴田 和夫, 空気調和・冷凍連合講演会講演論文集 Proceedings of Japanese Joint Conference on Air-conditioning and Refrigeration (Tokyo), 49, 4p, 15 Apr. 2015
[日本冷凍空調学会], Japanese

Development of low cost & high efficiency ground source heat pump system and its design & evaluation method(Part-1)Investigation on reduction the installation cost of ground heat exchangers and performance improvement of heat pump unit
長野 克則, 葛 隆生, 柴田 和夫, 空気調和・冷凍連合講演会講演論文集 Proceedings of Japanese Joint Conference on Air-conditioning and Refrigeration (Tokyo), 49, 4p, 15 Apr. 2015
[日本冷凍空調学会], Japanese

Study on the design and development of evaluation method of low cost & high-efficiency GSHP system: Part 5: Discussion on methods of achieving high-efficiency GSHP for space heating
LIU Hongzhi, KUBO Kento, MORI Yuki, KATSURA Takao, NAGANO Katsunori, KUBOTA Koukan, OKAMOTO Atsushi, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 49th, 2015

Study on High-efficiency Ground Source Heat Pump (GSHP)
LIU Hongzhi, NAGANO Katsunori, KATSURA Takao, ZHENG Yu, KUBO Kento, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2015, 2015

地中熱ヒートポンプシステムの低コスト・高効率化と設計・評価手法の開発に関する研究 その4 業務用空調・給湯用地中熱源ヒートポンプのサイクルシミュレーションの開発
久保憲人, LIU Hongzhi, 森祐輝, 葛隆生, 長野克則, 久保田康幹, 岡本淳, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 49th, 2015

地中熱ヒートポンプシステムの低コスト・高効率化と設計・評価手法の開発に関する研究 その6 多熱源・多機能ヒートポンプのサイクルシミュレーションツールの開発とその応用
森祐輝, LIU Hongzhi, 久保憲人, 葛隆生, 長野克則, 久保田康幹, 岡本淳, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 49th, 2015

天然メソポーラス材料を用いた低コスト吸着式ヒートポンプの研究開発
森田敦, LIU Hongzhi, 中村真人, 長野克則, 外川純也, 黒石広明, 空気調和・衛生工学会北海道支部学術講演会論文集(CD-ROM), 49th, 2015

天然メソポーラス材料を用いた吸着式ヒートポンプに関する研究 第1報:研究概要とラボスケールの吸着材充填熱交換器を用いた冷熱取り出し評価
外川純也, 森田敦, LIU Hongzhi, 中村真人, 長野克則, 黒石広明, 原田克彦, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2015, 2015

天然メソポーラス材料を用いた吸着式ヒートポンプに関する研究 その2:真空下における塩化物担持吸着材の水蒸気吸脱着特性の評価
森田敦, 外川純也, LIU Hongzhi, 中村真人, 長野克則, 日本冷凍空調学会年次大会講演論文集(CD-ROM), 2015, 2015

Development of Desiccant Air Conditioning System Using Wakkanai Siliceous Shale(Part 22)Experimental Study of the Odor Transfer of the Elements in the Desiccant Ventilation Unit
青木 智恵美, 小牧 あゆみ, 長野 克則, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, C213, 1-4, 2015
日本冷凍空調学会, Japanese

Development of Desiccant Air Conditioning System using Wakkanai Siliceous Shale(21st Report)Summer period performance evaluation of a detached house with a retrofitted ground source heat pump and desiccant ventilation unit in Hokkaido
小椋 凌, 長野 克則, 中村 真人, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, C212, 1-4, 2015
日本冷凍空調学会, Japanese

Study on High-efficiency Ground Source Heat Pump (GSHP)
LIU Hongzhi, NAGANO Katsunori, KATSURA Takao, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, B114, 1-4, 2015
日本冷凍空調学会, English

Development of vacuum insulation panels with small thickness and light transmittance to contribute high insulation for existence buildings
葛 隆生, 長野 克則, 村上 友章, 太陽/風力エネルギー講演論文集, 101, 104, 2015
日本太陽エネルギー学会, Japanese

Investigation of design method and installation effect of Heat Recovery Ground Source Heat Pump system
NGUYEN HAI DANG, 葛 隆生, 長野 克則, 太陽/風力エネルギー講演論文集, 119, 122, 2015
日本太陽エネルギー学会, Japanese

Experimental proof of the performance of system applying variable water volume control: Development of a low flow circulation ground source heat pump multi-split system (Part 2)
Yasushi Nakamura, Takao Katsura, Katsunori Nagano, Journal of Environmental Engineering (Japan), 80, 711, 433, 440, 2015
Field test of the Ground Source Heat Pump (GSHP) system applying variable water volume (VWV) control and multi-split heat pump has been carried out in order to demonstrate the effect of reduction of circulation pumps' electric power consumption. It was confirmed that the constant differential temperature control is practicable method as the VWV control method. As the result of field test, the GSHP system applying VWV control could reduce approximately 80% of circulation pumps' electric power consumption compared to the GSHP system applying constant water volume. Seasonal performance factor of the GSHP system was 4.51 and this result achieved the target value of more than 4.5. During the heating operation, seasonal performance factor of the GSHP system was 3.61 and the value was higher than the one of conventional system. In addition, it was shown that the decrease of system COP of GSHP system using antifreeze solution as heat carrier fluid is less than 15% compared to the one of GSHP system using water., Architectural Institute of Japan, Japanese

Recent Developments of GSHP in Hokkaido
長野 克則, 空気調和・衛生工学, 88, 10, 983, 987, Oct. 2014
空気調和・衛生工学会, Japanese

地中熱利用ヒートポンプ技術・市場の最前線
長野克則, クリーンテクノロジー, 24, 6, 17, 25, 10 Jun. 2014
Japanese

大地を熱源とするヒートポンプシステムの研究開発・導入事例 地中熱ヒートポンプシステムを核としたNet Zero Energyを目指した建物の計画手法とコミッショニング
長野克則, 太陽エネルギー, 40, 3, 9, 15, 30 May 2014
日本太陽エネルギー学会, Japanese

平成25年度産業技術振興講演会 再生可能エネルギー関連産業セミナーin郡山 開催報告
笹田 政克, 長野 克則, 内田 洋平, 東北活性研, 15, 38, 42, Apr. 2014
東北活性化研究センター, Japanese

住宅の省エネ化と断熱建材 3.住宅の省エネ化先進事例(1)多熱源ヒートポンプ暖房・給湯システムを導入した寒冷地のパッシブ・ローエネルギー住宅
長野克則, IBEC, 34, 6, 38, 43, 01 Mar. 2014
建築環境・省エネルギー機構, Japanese

多熱源ヒートポンプ暖房・給湯システムを導入した寒冷地のパッシブ・ローエネルギー住宅 (特集 住宅の省エネ化と断熱建材) -- (住宅の省エネ化先進事例)
長野 克則, IBEC, 34, 6, 38, 43, Mar. 2014
建築環境・省エネルギー機構, Japanese

Study on Solar Energy Driving Domestic Hot Water Supply and Cooling System Part 2 Development of the Sorption Air Cooling Device
LIU Hongzhi, MORITA Atsushi, NAKAMURA Makoto, NAGANO Katsunori, 空気調和・衛生工学会北海道支部学術講演会論文集, 48th, 2014

太陽熱給湯冷房システムに関する研究 その1 高性能集熱器による中温集熱性能の実験とシステムシミュレーション
森田敦, 長野克則, 中村真人, LIU Hongzhi, 井上行雄, 原田克彦, 空気調和・衛生工学会北海道支部学術講演会論文集, 48th, 2014

Development of Desiccant Air Conditioning System using Wakkanai Siliceous Shale(18th report)Study on the Operating Conditions by Changing the Outside Air Load
長野 克則, 小椋 凌, 中村 真人, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, A124, 1-4, 2014
日本冷凍空調学会, Japanese

Development of Desiccant Air Conditioning System using Wakkanai Siliceous Shale(Part 19)Study about the size of Total Heat Exchange Element and the Efficiency of Desiccant Unit
小椋 凌, 中村 真人, 長野 克則, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, A131, 1-4, 2014
日本冷凍空調学会, Japanese

Design and commissioning of Net Zero Energy oriented Houses and Buildings integrated with Ground Source Heat Pump System
長野 克則, 太陽エネルギー = Journal of Japan Solar Energy Society, 40, 3, 9, 15, 2014
日本太陽エネルギー学会, Japanese

ヒートポンプ技術の進展と応用 地中熱利用ヒートポンプの現状と展望
長野克則, エネルギー・資源, 34, 5, 275, 281, 05 Sep. 2013
エネルギー・資源学会, Japanese

Current Situation and Perspectives of the Ground Source Heat Pump System
長野 克則, エネルギー・資源 = Energy and resources, 34, 5, 275, 281, Sep. 2013
エネルギー・資源学会, Japanese

An Open Chemical Thermal Energy Storage (TES) System Used Honeycomb Filters Made from Mesoporous Material Supported by CaCl₂
LIU Hongzhi, NAKAMURA Makoto, SUGIYAMA Daichi, NAGANO Katsunori, 空気調和・衛生工学会北海道支部学術講演会論文集, 47th, 2013

Study on energy balance of Low Energy House in extreme cold region
相場 和貴, 長野 克則, 中村 真人, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, 103, 106, 2013
日本冷凍空調学会, Japanese

A study on desiccant air conditioning system using Wakkanai siliceous shale integrated with heatpump system(Part 2)Development of the integrated system and evaluation
NABESHIMA Yuki, TOGAWA Junya, OMOTEYAMA Chiemi, SUGIYAMA Daichi, NAGANO Katsunori, NIKI Kousuke, FURUKAWA Osamu, ISHII Yukio, Symposium on Environmental Engineering, 23, 344, 347, 2013
This study aims to develop and evaluate a desiccant ventilation system, using desiccant rotors of the Wakkanai siliceous shale (WSS), combined with heat pump system by using exhaust heat for regeneration process. An integrated unit combining desiccant ventilation system which applies to WSS as desiccant material and heat pump for space heating, cooling and hot water supply is invented. The heat pump supplies heat and cold energy into the desiccant unit to increase the amount of dehumidification. This study aims to evaluate cooling and dehumidifying performance of the integrated system. As a result, the unit dehumidified 2.2〜7.8 g/kg_ and cooled air by 5.8 kW in the weather assuming areas around Tokyo. It was under the condition that 21〜25 ℃ pre-cooling and 32〜44 ℃ regeneration of desiccant. COP marked 4.2〜5.8., The Japan Society of Mechanical Engineers, Japanese

A Study on Desiccant Air Conditioning System using Wakkanai Siliceous Shale Integrated with Heat Pump System : Development of Desiccant Rotor and Evaluation of the Dehumidification Ability
TOGAWA Junya, NABESH1MA Yuki, OMOTEYAMA Chiemi, SUGIYAMA Daichi, NAGANO Katsunori, OKADA Makoto, Symposium on Environmental Engineering, 23, 340, 343, 2013
This study is a development of new desiccant rotor using a natural meso-porous material called Wakkanai siliceous shale, for the low temperature regeneration. To enhance the water sorption amount of WSS contained paper, the impregnation using various concentration of the chloride solution (NaCl and MgCl_2) was examined. Water sorption ability easily depended on the chloride supporting amount in the WSS paper. In addition, three WSS rotors different in chloride supporting amount (1.9, 3.8 and 9,6 g/m^2) were prepared and evaluated. The result shows, the WSS rotor of 1.9 g/m^2 gave highest dehumidification amount of 10,1 g/kg_ at 40 ℃ of the regeneration temperature, in spite of the least chloride amount., The Japan Society of Mechanical Engineers, Japanese

Development of Desiccant Air Conditioning System using Wakkanai Siliceous Shale(12th Report)Measurement Test of An Integrated Heat Pump with Desiccant Unit
長野 克則, 鍋島 佑基, 杉山 大地, 日本冷凍空調学会年次大会講演論文集 = Proceedings of the JSRAE Annual Conference, 173, 176, 2013
日本冷凍空調学会, Japanese

Development of Desiccant Air Conditioning System using Wakkanai Siliceous Shale(12th Report)Measurement Test of an Integrated Heat Pump with Desiccant Unit
長野 克則, 鍋島 佑基, 杉山 大地, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, 173, 176, 2013
日本冷凍空調学会, Japanese

Study on Ground Source Heat Pump System using Cast in Place Concrete Foundation : The possible use of shallow heat exchanger
WAKAYAMA Hisashi, KATSURA Takao, NAGANO Katsunori, SATO Nobutaka, 空気調和・衛生工学会論文集, 37, 189, 21, 28, 05 Dec. 2012, [Peer-reviewed]
A GSHP system using cast in place concrete foundation in a high school building was studied and the process including planning, design, installation and commissioning was presented along with the measured results. The GSHP system has not been applied in practice in warm areas. This report shows the possibility of high-performance operation during the summer in a warm area by the actual performance of this system. The result suggests the possibility of the GSHP system being used in warm areas. The GSHP system contains shallow 7 m depth heat exchangers. This study shows the planning summary and the possibility of practically using a shallow-type GSHP system in a warm region through the results of actual operation data analysis., 社団法人空気調和・衛生工学会, Japanese

P-28 Measurement of near-infrared/visible reflectance and transmittance of clothing
KUWABARA Kouhei, YACHI Makoto, KUBOTA Hideki, HAMADA Yasuhiro, NAKAMURA Makoto, NAGANO Katsunori, Proceedings of the ... Symposium on Human-Environment System, 36, 229, 232, 21 Nov. 2012
Abstract: Near-infrared (800~2800nm)reflectance p_-NIR visible reflectance p-v near-infrared transmittance tcl-NIR and visible transmittance tcl-v 100% polyester and 100% cotton T-shirts and 40%polyester/60%cotton trouser were measured by using albedometer and pyranometer covered by IR-80 filters. Mean values of the Pcl-NIR t-v and a-NIR were around 0.61, 0.28 and 0.11 respectively Solar operative temperature considering net near-infrared and visible absorptances was derived., Japanese Society of Human-Environment System, Japanese

海外における地中熱ヒートポンプの現状
長野 克則, 建築設備&昇降機, 100, 45, 52, 15 Nov. 2012
日本建築設備・昇降機センター, Japanese

Study on Ventilation System with Heat Recovery in Cold Region
SASAKI Tatsuya, NAGANO Yuki, NABESHIMA Katsunori, NAKAMURA Masato, 学術講演会論文集, 24, 1, 241, 244, 20 Aug. 2012
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Model of Predicting Body Temperatures : for Protecting Heat Disorder in Hot Environment-Part XII
MINAMISAWA Keiichi, KUWABARA Kouhei, KUBOTA Hideki, YACHI Makoto, HAMADA Yasuhiro, NAKAMURA Makoto, NAGANO Katsunori, 学術講演会論文集, 24, 1, 913, 916, 20 Aug. 2012
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Ground Source Heat Pump System Introduced in a Large Scale Shopping Store : (Part2)Optimum Operating Condition of Ground Source/Air Source Heat Pump System
MIYAMOTO Shota, NAGANO Katsunori, NAKAMURA Michihiko, HATANAKA Akira, HORIIKE Shun, 学術講演会論文集, 24, 1, 757, 760, 20 Aug. 2012
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Ground Source Heat Pump System Introduced in a Large Scale Shopping Store : (Part 1)Building Outlines and Design Concepts about the System
HORIIKE Shun, NAKAMURA Michihiko, HATANAKA Akira, NAGANO Katsunori, MIYAMOTO Shota, 学術講演会論文集, 24, 1, 753, 756, 20 Aug. 2012
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Model of Predicting Body Temperatures : for Protecting Heat Disorder in Hot Environment-Part XIII
YACHI Makoto, KUWABARA Kouhei, KUBOTA Hideki, NAGANO Katsunori, NAKAMURA Makoto, HAMADA Yasuhiro, 学術講演会論文集, 24, 1, 917, 920, 20 Aug. 2012
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Study of Sterilization System using Ozone Gas for Aseptic Environments in Cleanrooms : (Part.2)Evaluation of the Tolerance of Construction and Equipment Materials to Ozone Gas
OKABE Hiroyuki, NAGANO Katsunori, SHINTANI Hideharu, KATO Miyoshi, MIYAKE Shinko, YOKOI Mutsumi, IWAMURA Takuji, 学術講演会論文集, 24, 1, 381, 384, 20 Aug. 2012
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Study of Sterilization System using Ozone Gas for Aseptic Environments in Cleanrooms : (Part.3) Effects of the Sterilization System by Using Ozone Gas for the Pharmaceutical Factory
YOKOI Mutsumi, NAGANO Katsunori, SHINTANI Hideharu, KATO Miyoshi, MIYAKE Shinko, IWAMURA Takuji, OKABE Hiroyuki, 学術講演会論文集, 24, 1, 385, 388, 20 Aug. 2012
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Application of a Heating and Cooling System Using Ground Source Heat Pump to Greenhouses
YAMAMOTO Kazuya, NAGANO Katsunori, NAKAMURA Makoto, 学術講演会論文集, 24, 1, 589, 592, 20 Aug. 2012
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Study of Sterilization System using Ozone Gas for Aseptic Environments in Cleanrooms : (Part.1)System Configuration
IWAMURA Takuji, NAGANO Katsunori, SHINTANI Hideharu, KATO Miyoshi, MIYAKE Shinko, YOKOI Mutsumi, OKABE Hiroyuki, 学術講演会論文集, 24, 1, 377, 380, 20 Aug. 2012
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Investigation of Chemical Thermal Energy Storage Materials Applied to Solar Thermal Hot Water Supply System
SUGIYAMA Daichi, NAGANO Katsunori, TOGAWA Jyunya, 学術講演会論文集, 24, 3, 2641, 2644, 20 Aug. 2012
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

The Effectiveness of a Sterilization System Using Ozone Gas for Pharmaceutical Factories
IWAMURA Takuji, NAGANO Katsunori, NOGAMI Toshihiro, MATSUKI Noritomo, SHINTANI Hideharu, KATO Miyoshi, YOKOI Mutsumi, 空気調和・衛生工学会論文集, 37, 184, 1, 10, 05 Jul. 2012, [Peer-reviewed]
A fumigation system that employed ozone gas was used for sterilizing bio-cleanrooms. In this study, the parameters affect it were examined by CFD and measurement in bio-cleanrooms. Air flow distribution had been determined in advance. Thus, the environment in the bio-cleanroom was checked to determine whether ozone gas and water vapor could spread uniformly. Ozone gas concentration, air temperature and relative humidity in the bio-cleanroom were measured, and their values were compared to the results of CFD analysis. Furthermore, the effectiveness of sterilizing the bio-cleanroom was verified by using biological indicators., 社団法人空気調和・衛生工学会, Japanese

Current state of ground source heat pump system in Japan and R&D topics in Hokkaido University
NAGANO Katsunori, Journal of Groundwater Hydrology, 54, 2, 95, 105, 31 May 2012
地中熱ヒートポンプシステム（GSHP）が徐々に市民権を得てきている。国も2009年にエネルギー供給構造高度化法の中でヒートポンプが利用する地中熱を再生可能エネルギー源の一つと定義した。GSHPは省エネルギーのみならずピークカットにも効果的であり，スマートグリッドにおいて蓄熱と組み合わせて大きな役割が期待できる。本稿では我が国のGSHPを取り巻く状況を概説するとともに，筆者の研究成果として設計・性能予測ツール，小水量循環型高効率システム，地下水流れを伴う地盤内温度高速演算手法，多熱源対応コンパクト・ヒートポンプユニットを紹介した。最後に，熱利用におけるGSHPの重要性と普及拡大への課題について言及した。, Japanese Association of Groundwater Hydrology, Japanese

Study of Sterilization System using Ozone Gas for Aseptic Environments in Bio-cleanrooms
IWAMURA Takuji, NAGANO Katsunori, NOGAMI Toshihiro, SHINTANI Hideharu, KATO Miyoshi, Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 37, 182, 1, 8, May 2012, [Peer-reviewed]
An advanced sterilized environment is required in bio-cleanrooms for aseptic preparation. Until now, formaldehyde gas sterilization has been used for sterilizing a bio-cleanroom; however, owing to the residual problems associated with formaoldehyde, substitute sterilization methods are required. The fumigation system using ozone gas is a substitute sterilization method and has some advantages such as concentration control of ozone gas by its measument and easy decomposition of ozone gas to oxygen using a catalyst. In this study, the characteristics of ozone gas are examined and the sterilizing effect of ozone gas on floating fungus and adherent bacteria in bio-cleanrooms and the effectiveness of the fumigation system are analyzed., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

地中熱利用システムとヒートポンプ
長野 克則, 建築設備&昇降機, 0, 96, 24, 29, 15 Mar. 2012
日本建築設備・昇降機センター, Japanese

杭打ち機を用いた熱交換杭の施工法の開発とその能力
橋詰善光, 宮本重信, 梶村周平, 山崎三知朗, 竹内正紀, 長野克則, 福井県雪対策・建設技術研究所年報地域技術, 24, 27, 30, 08 Mar. 2012
Japanese

Evalation of borehole gshp performance for greenhouse in Japan and its numerical model
Huai Li, Katsunori Nagano, Yuanxiang Lai, Kazuo Shibata, Hikai Fujii, 6th Asian Conference on Refrigeration and Air Conditioning, ACRA 2012, 570, 581, 01 Jan. 2012
A ground source heat pump (GSHP) system was installed to maintain an appropriate temperature for the growth of orchid in Akabira city, Japan. The borehole field consists of 78 vertical boreholes with a depth of 85m each. It provides a maximum heating and cooling load of 640 and 648 kW respectively. As one of the biggest borehole system in the country, it is valuable to evaluate the variation of the soil temperature in the deep ground caused by the huge heat extraction and injection during a long term operation. The performance of the system during the period of October 2010 to May 2011 was monitored and analyzed. The results indicate that the COP ranges from 2.5 to 3.5 while SCOP varies between 2.27 to 3.0, respectively. The average heat extraction rate of the system was found approximately 27.2W/m. 162 tons of CO2can be reduced assume an SCOP of 2.0. On the other hand, the ground temperature at a depth of 40m decreased from around 7.8°C to 0°C during 7 month's operation. Through the measurement data, it is found that the system could guarantee the desired greenhouse indoor temperature even in the coldest month. As the heating demand of Akabira region surpass its cooling demand, a numerical model was developed by FEFLOW to predict its behavior and examine the balance between the extracted and injected heat. The model was examined by the experimental data first, and then the matched model was used for the long-term operation prediction. It is concluded from the simulation results that the system could maintain the heat exchange rate after several years without degradation on its performance. What is more, the variations of the average heat extraction against the groundwater velocities and the thermal conductivity of the grout were discussed to estimate their influence to the borehole performance.

New developments of ground heat exchanger for Ground-Coupled Heat Pump System
長野 克則, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, A111, 1-4, 2012
日本冷凍空調学会, Japanese

Development of Desiccant Air Conditioning System using Wakkanai Siliceous Shale(10th Report)Annual Performance Prediction using Numerical for the Desiccant System
鍋島 佑基, 長野 克則, 外川 純也, 日本冷凍空調学会年次大会講演論文集 = Proceedings of the JSRAE Annual Conference, 75, 78, 2012
日本冷凍空調学会, Japanese

Development of Desiccant Air Conditioning System using Wakkanai Siliceous Shale(10th Report)Annual Performance Prediction using Numerical Analysis for the Desiccant System
鍋島 佑基, 長野 克則, 外川 純也, 日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference, B132, 1-4, 2012
日本冷凍空調学会, Japanese

Current status of Ground Source Heat Pump System and challenge in Japan
長野 克則, エネルギーと動力, 62, 279, 73, 82, 2012
日本動力協会, Japanese

Ground Thermal Energy System
NAGANO Katsunori, TRENDS IN THE SCIENCES, 17, 1, 1_66, 1_73, 2012
Japan Science Support Foundation, Japanese

Numerical modeling of large-scale cluster of vertical ground heat exchangers
Masafumi Fujimoto, Hikari Fujii, Katsunori Nagano, Atsushi Hiromatsu, Transactions - Geothermal Resources Council, 35 2, 1101, 1105, 01 Dec. 2011
A large-scale geothermal heat pump (GHP) system, located in Hokkaido, Japan, consists of 78 vertical borehole heat exchangers (BHEs) of 85 meters deep. The GHP system has been operated since December 2008 for cooling and heating of the greenhouses in which Phalaenopsis orchid are cultivated. Since the heating load is much higher than the cooling load in Hokkaido, maintaining the operation performance of the system requires the consideration on the heat balance between heat extraction and disposal. Moreover it is also important to evaluate the influence of long-term heat exchange on ground temperatures because the influences are accumulated with time. Thus, in this research, a heat transport and groundwater flow numerical model (GHP system model), which has 78 vertical BHEs, simulates long-term heat pump operation to predict the future behavior of the heat exchange and to investigate the influence of GHP on the ground temperatures. The GHP system model requires the evaluation of underground physical properties as input such as ground thermal and hydraulic conductivities. In this study, these parameters are estimated using single borehole heat exchanger numerical model (Single BHE model). The estimated parameters are then used to construct the GHP system model, which is validated through a history matching. Then we performed the long-term simulations using the validated model with 4 cases of different balances of heat load per year, which consist of heating period of 9 months and cooling periods of 0-3 months. The heat extraction rate in the case of 1 month cooling decreases in the long run, while the heat extraction rate is well-maintained in the case of 2 month cooling period. As a consequence, even if amount of heat disposal and heat extraction with ground are not balanced, it is still possible to maintain the heat exchange rate for long time period.

デシカント空調の期待と課題 2)稚内層珪質頁岩デシカント空調
長野克則, 建築設備と配管工事, 49, 12, 52, 58, 05 Oct. 2011
Japanese

S3-3 Effect of clothing properties (colour, thermal, and evaporative) on mean skin temperature in a hot outdoor environment
Kuwabara Kouhei, Kubota Hideki, Yachi Makoto, Hamada Yasuhiro, Nagano Katsunori, Proceedings of the ... Symposium on Human-Environment System, 2011, 10, 10, 03 Oct. 2011
人間-生活環境系学会, English

P1-9 Passive hydrogen storage system of residential fuel cell CHP system for energy conservation
Shirato Hiroyasu, Hamada Yasuhiro, Suda Takanori, Sakairi Masatoshi, Oka Yoshiaki, Nagano Katsunori, Proceedings of the ... Symposium on Human-Environment System, 2011, 49, 49, 03 Oct. 2011
人間-生活環境系学会, English

Evaluation of Heat Exchange Characteristics of U-tube Heat Exchanger Piles used Pile Driver
TANNO Keisuke, NAGANO Katsunori, Nakamura Makoto, JIN Chunyue, 学術講演会論文集, 23, 1, 381, 384, 31 Aug. 2011
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Feasibility Study on Desiccant Air Conditioning System Used Wakkanai Siliceous Shale : Part3 - Development of Desiccant System Combined with Household Heat Pump System
FUKUSHIMA Hiroki, NAGANO Katsunon, NABESHIMA Yuki, NAKAMURA Makoto, TOGAWA Junya, NIKI Kohsuke, 学術講演会論文集, 23, 3, 2197, 2200, 31 Aug. 2011
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Characterization of Air Cleaning Filters Made of the Wakkanai Siliceous Shale
MIYAMOTO Shota, NAGANO Katsunori, NAKAMURA Makoto, TOGAWA Jyunya, KUROKAWA Asami, 学術講演会論文集, 23, 3, 1929, 1932, 31 Aug. 2011
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Feasibility Study on the Desiccant Air Conditioning System Using Wakkanai Siliceous Shale : Part 4 - Demonstration experiment of an Integrated System Combined with Heat Pump System
NAGANO Katsunori, NABSHIMA Yuki, NAKAMURA Makoto, TOGAWA Junya, KUROKAWA Asami, NIKI Kousuke, 学術講演会論文集, 23, 3, 2201, 2204, 31 Aug. 2011
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Model of Predicting Body Temperatures for Protecting Heat Disorder in Het Environment-Part XI
YACHI Makoto, KUWABARA Kouhei, KUBOTA Hideki, HAMADA Yasuhiro, NAKAMURA Makoto, NAGANO Katsunori, 学術講演会論文集, 23, 2, 1075, 1078, 31 Aug. 2011
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Study on Evaluation of Present Performance and Future of Residential Load following Gas Engine Combined Heat and Power Systems
TAKEDA Kiyotaka, GOTO Ryuichiro, NAKAMURA Mitsuru, HAMADA Yasuhiro, MURAI Takuya, NAGANO Katsunori, 学術講演会論文集, 23, 2, 775, 778, 31 Aug. 2011
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

8-338 A study of Japanese Business Language and Culture Classes in the Hokkaido University Frontier Program for International Students from Asia : Elementary learners' communication problems and solutions
YANAGIMACHI Tomoharu, NAGANO Katsunori, ENAI Masamichi, BABA Naoshi, 工学教育研究講演会講演論文集, 23, 59, 652, 653, 22 Aug. 2011
Japanese Society for Engineering Education, Japanese

P-25 A Study of Business Japanese Language and Japanese Business Culture Classes in the Hokkaido University Frontier Program of the Career Development Program for Foreign Students in Japan : An outline of business Japanese language and Japanese business culture classes
NAGANO Katsunori, YANAGIMACHI Tomoharu, ENAI Masamichi, BABA Naoshi, 工学教育研究講演会講演論文集, 23, 59, 766, 767, 22 Aug. 2011
Japanese Society for Engineering Education, Japanese

41442 Development of Ground Source Heat Pump Units That is Capable of Air-conditioners and Hot Water Supply
Ito YASUYUKI, Nagano KATSUNORI, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-2, Environmental engineering II, Heat, moisture, thermal comfort, natural energy, air flow, ventilation, smoke exhaustion, computational fluid dynamics, indoor air quality heating, cooling and air-conditioning heat and cold sources, piping systems application of building services, 2011, 901, 902, 20 Jul. 2011
Architectural Institute of Japan, Japanese

船橋市立リハビリテーション病院における“基礎杭利用型地中熱ヒートポンプシステムを組み込んだ全電化熱源システム”
若山尚之, 松本隆志, 仲井章一, 中野一樹, 石井勝, 長野克則, 葛隆生, 柳原隆司, 金田一清香, 空気調和・衛生工学, 85, 7, 522, 523, Jul. 2011, [Peer-reviewed]
Japanese

Study on Hydrogen Storage System for Residential Energy System and Independent Power Supply with Hydrogen Absorbing Alloys and Air Heat Exchange Type Container: Part3-Energy Conservation Effect and Installation Analysis of Passive Hydrogen Storage Systems
SHIRATO HIROYASU, HAMADA YASUHIRO, SUDA TAKANORI, SAKAIRI MASATOSHI, OKA YOSHIAKI, HAYASHI HIROKI, IKEDA HIDEAKI, NAGANO KATSUNORI, 空気調和・衛生工学会論文集, 36, 171, 1, 7, Jun. 2011, [Peer-reviewed]
This paper is the third report of a series of research on passive type hydrogen storage systems with hydrogen absorbing alloys. In this paper, we calculated energy conservation effect and executed installation analysis of the passive hydrogen storage systems that store and supply hydrogen from a reformer for fuel cell CHP (Combined Heat and Power) systems. Installation of the hydrogen storage systems to the fuel cell CHP systems for residential energy systems enables to reduce start-up energy and primary energy for response to electric load change. It was showed that from several kg to maximum 15kg of metal hydrides are necessary for the passive hydrogen storage systems and these systems are superior to batteries in terms of energy density, durability and initial cost. In conclusion, it was cleared that these systems are worth the installation for the fuel cell CHP systems., The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan, Japanese

地下熱利用技術 2.地下熱利用技術とは
長野克則, 地下水学会誌, 53, 1, 83, 90, 28 Feb. 2011
Japanese

Techniques for Ground Thermal Energy System 2. Introduction to Ground Thermal Energy System
NAGANO Katsunori, Journal of Groundwater Hydrology, 53, 1, 83, 90, 28 Feb. 2011
Japanese Association of Groundwater Hydrology, Japanese

Development of high efficiency heat pump system for the space cooling, heating, and domestic hot water supply using desiccant ventilation system with Wakkanai siliceous shale (part 2) Measurement of summertime-test for the integrated heat pump
鍋島 佑基, 長野 克則, 中村 真人, Proceedings of JSES/JWEA Joint Conference, 2011, 147, 150, 2011
日本太陽エネルギー学会, Japanese

P-26 Solar reflectance, transmittance and absorptance of different clothing materials
KUWABARA Kouhei, YACHI Makoto, KUBOTA Hideki, KEDA Koki, HAYASHI Kentaro, HAMADA Yasuhiro, NAGANO Katsimori, Proceedings of the ... Symposium on Human-Environment System, 34, 209, 212, 22 Nov. 2010
Solar reflectance, transmittance and absorptance of different clothing materials were measured. Three T-shirts were selected: A(100% cotton), B(74% polyester and 26% cotton)and C(100% polyester). Regardless of clothing materials solar transmittance increased and reflectance decreased with increasing solar altitude. Relationship between luminance reflectance and solar reflectance, transmittance and absortptance was linear. Solar reflectance was almost same irrespective of clothing materials, while solar transmittance of T-shirt B was slightly higher than that ofthe others. The calculation of the effect of solar transmittance and absorptance on solar operative temperature under the same solar reflectance indicates that solar operative temperature decreases with decreasing solar transmittance and increasing solar absorptance of clothing., 人間-生活環境系学会, Japanese

素材の異なる衣服の日射透過率,日射反射率,日射吸収率
桑原浩平, 谷地誠, 窪田英樹, 池田光毅, 林健太郎, 濱田靖弘, 長野克則, 人間-生活環境系シンポジウム報告集, 34th, 209, 212, 22 Nov. 2010
Solar reflectance, transmittance and absorptance of different clothing materials were measured. Three T-shirts were selected: A(100% cotton), B(74% polyester and 26% cotton)and C(100% polyester). Regardless of clothing materials solar transmittance increased and reflectance decreased with increasing solar altitude. Relationship between luminance reflectance and solar reflectance, transmittance and absortptance was linear. Solar reflectance was almost same irrespective of clothing materials, while solar transmittance of T-shirt B was slightly higher than that ofthe others. The calculation of the effect of solar transmittance and absorptance on solar operative temperature under the same solar reflectance indicates that solar operative temperature decreases with decreasing solar transmittance and increasing solar absorptance of clothing., Japanese Society of Human-Environment System, Japanese

Study on Ground Source Heat Pump System applying PHC Foundation Piles and Short Term Thermal Energy Storage
WAKAYAMA Hisashi, NAGANO Katsunori, KATSURA Takao, KINDAICHI Sayaka, SATO Nobutaka, Transactions of the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan, 35, 163, 1, 9, Oct. 2010, [Peer-reviewed]
This paper deals with a summary of the GSHP system and the project process, and the anticipated effect of GSHP system. Heat exchange pipes are installed in the PHC foundation. The GSHP system is expected to improve the COP by introducing short term thermal energy storage operation. In this paper, it is shown a condition in the soil as a geologic column, the operating concept, conception drawing, the result of the thermal response test. It is also noted the result of simulation about short term thermal energy storage system of the GSHP system. As the result, annual power consumption of the GSHP and summer season power consumption of the air source Heat Pumps for hot water supply in this model (case2) is estimated 8% lower than usual model (case1)., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

薄板状潜熱蓄熱材を利用した蓄熱型床吹き出し空調に関する研究
鈴木道哉, 竹林芳久, 中村卓司, 松下景太, 長野克則, 環境の管理, 70, 15, 22, 20 Aug. 2010
日本環境管理学会, Japanese

B-39 Study on Evaluation of Residential Combined Heat and Power Systems by Solid Oxide Fuel Cell
MURAI Takuya, HAMADA Yasuhiro, AMAZAWA Keita, NAGANO Katsunori, GOTO Ryuichiro, NAKAMURA Mitsuru, TAKEDA Kiyotaka, 学術講演会論文集, 22, 2, 959, 962, 12 Aug. 2010
This study aims to verify the effectiveness of optimum utilization of residential combined heat and power systems in cold regions for energy conservation. The numerical simulations concerning optimum utilization of residential combined heat and power systems were carried out, their optimum operation conditions and the effects of the primary energy reduction were evinced. In order to verify the availability of power and heat supply system that uses the CHP, we carried out analyses on characteristics of energy demand and the ratio of heat to power., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-38 Study on Evaluation of Residential Combined Heat and Power Systems by Solid Oxide Fuel Cell
GOTO Ryuichiro, NAKAMURA Mitsuru, TAKEDA Kiyotaka, HAMADA Yasuhiro, AMAZAWA Keita, MURAI Takuya, NAGANO Katsunori, 学術講演会論文集, 22, 2, 955, 958, 12 Aug. 2010
This report describes the evaluation concerning the performance of residential combined heat and power systems of fuel cells (SOFC) in the experimental house. First, the outline is shown about the system itself and experimental condition. Secondly, operation results are shown. And, the effects of the primary energy reduction are evinced., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-35 Study on hybrid energy buffer system for residential combined heat and power
TERAO Kazutaka, HAMADA Yasuhiro, SUDA Takanori, IGARASHI Shunsuke, NAGANO Katsunori, GOTO Ryuichiro, NAKAMURA Mitsuru, TAKEDA Kiyotaka, 学術講演会論文集, 22, 2, 943, 946, 12 Aug. 2010
This study aims to develop a hybrid energy buffer system for residential combined heat and power. Firstly, the effect of residential fuel cell combined heat and power systems was evaluated. Secondly, we propose the hydrogen storage alloy and the electric double layer capacitor as a energy buffer, and the effect of energy supply systems with each buffer was evaluated., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-37 Study on Evaluation of Present Performance and Future of Residential Load following : Gas Engine Combined Heat and Power Systems
TAKEDA Kiyotaka, GOTO Ryuichiro, NAKAMURA Mitsuru, HAMADA Yasuhiro, AMAZAWA Keita, MURAI Takuya, NAGANO Katsunori, 学術講演会論文集, 22, 2, 951, 954, 12 Aug. 2010
This study aims to verify the effectiveness of optimum utilization of residential combined heat and power systems in cold regions for energy conservation. The outline is shown introducing the system and experimental condition. Operation results and primary energy reduction on representative weeks are shown and results on a space heating period are shown., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

D-43 Feasibility Study on Desiccant Air Conditioning System Used Wakkanai Siliceous Shale : Part 1 Evaluation on dehumidification ability of the desiccant rotor
NISHIKAWA Emi, NAGANO Katsunori, NAKAMURA Makoto, NAKABAYASHI Saya, TOGAWA Jyunya, KUROKAWA Asami, 学術講演会論文集, 22, 2, 1179, 1182, 12 Aug. 2010
The objective of this study is to develop a desiccant system using natural mesoporous material, Wakkanai siliceous shale. A honeycombed desiccant rotor containing this shale's powder and chlorides was made and evaluated. The dehumidification ability was 7〜15% higher than that of the silica-gel rotor. Amount of dehumidification gave 3.0〜5.6 g/kg_ at the range of 0.5〜10 rpm. The rate of energy reduction to remove the outdoor air-conditioning load was estimated to be 50% by combination this rotor and a sensible heat exchanger. In addition, the rotor could dehumidify stably in the continuous test for a week., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

D-44 Feasibility Study on the Desiccant Air Conditioning System Using Wakkanai Siliceous Shale : Part 2 Prediction of Dehumidification Performance on Desiccant Wheel by Numerical Calculation
NAKABAYASHI Saya, NAGANO Katsunori, NAKAMURA Makoto, NISHIKAWA Emi, TOGAWA Junya, KUROKAWA Asami, 学術講演会論文集, 22, 2, 1183, 1186, 12 Aug. 2010
The numerical model based on the performance tests on a desiccant wheel, which was developed by using Wakkanai siliceous shale, was presented, and the dehumidification performance was predicted from this model under the several conditions. They showed that the dehumidification amount increased with increasing the diameter, the cell number, and especially the length of the wheel. This wheel's dehumidification amount was estimated as 55% of the required dehumidification amount for the hottest day in Tokyo in 2008. The dehumidification amount of this wheel increased to 89% when a pre-cooling was employed to the system., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

G-24 Model of Predicting Body Temperatures for Protecting Heat Disorder in Hot Environment -Part X
HAYASHI Kentarou, KUWABARA Kouhei, KUBOTA Hideki, HAMADA Yasuhiro, NAKAMURA Makoto, NAGANO Katsunori, 学術講演会論文集, 22, 2, 1431, 1434, 12 Aug. 2010
In order to contribute to the safety measures to protect against heat stroke, the authors focused on prediction of sweating rate and mean skin temperature of the human body. In this paper, the effect of heat acclimatization on regulatory thermal sweating was considered. The authors identified the effect of heat acclimatization on increasing sweat rate and verified the validity of the prediction model based on our experimental data and early works., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-49 Development of a Low Flow Circulation Ground Source Heat Pump Multi-split System : Part-6 Development of a performance prediction tool for the GSHP system combined cooling tower
KATSURA Takao, NAKAMURA Yasushi, NAGANO Katsunori, OKAWADA Toru, 学術講演会論文集, 22, 3, 1875, 1878, 12 Aug. 2010
When the ground source heat pump (GSHP) system is installed to the commercial building in moderate climate region, ground temperature is raised by imbalance between cooling load and heating load. In this case, it is necessary to release the excess exhaust heat to the atmosphere with cooling tower. Therefore, the authors developed a performance prediction tool for the GSHP system combined cooling tower. In addition, performance of the GSHP system combined cooling tower, which will be installed in a new office building in Kitakyushu, is predicted with the tool. The result shows the GSHP system can operate with high efficiency long term although the cooling load is too much compared to the heating load., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-50 Development of a Low Flow Circulation Ground Source Heat Pump Multi-split System : Part-7 Investigation of design and operating method of the GSHP system combined cooling tower
OKAWADA Toru, NAGANO Katsunori, NAKAMURA Yasushi, KATSURA Takao, 学術講演会論文集, 22, 3, 1879, 1882, 12 Aug. 2010
The authors investigate operating and design method of the ground source heat pump (GSHP) system combined cooling tower by using a computer aided simulation program. The GSHP system provides the highest performance when cooling tower is connected in series with ground heat exchangers (GHEXs) and the water as thermal medium is circulated to the cooling tower ahead of the GHEXs. Furthermore, the system performance is increased by set the water temperature in which the cooling tower is operated. Finally, we measure and evaluate the performance of a low flow circulation GSHP multi-split system combined cooling tower, which is installed an actual building., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-53 Study on energy environment of totally electrified heating and cooling system in the hospital. : (Part4) The performance verification of heating and cooling system
WAKAYAMA Hisashi, NAKANO Kazuki, NAKAI Shoichi, MATSUMOTO Takashi, KINDAICHI Sayaka, YANAGIHARA Ryuji, NAGANO Katsunori, KATSURA Takao, NODA Hiroshi, 学術講演会論文集, 22, 3, 1891, 1894, 12 Aug. 2010
We designed R hospital in Chiba with totally electrified heat source system and it is completed in Feb 2008. In this paper, the cooling and heating load and peak load is confirmed in summer, winter and the mid-season. And, water and hot water consumption is reported, and they are compared with planned value. Furthermore, we proposed the operation to reduce the energy consumption that the heat source equipment is halted when heating load is unwanted in summer or cooling load in winter and the impact is estimated., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-54 Study on energy environment of totally electrified heating and cooling system in the hospital : (Part5) The report of ground source heat pump system operation improvement
WAKAYAMA Hisashi, MATSUMOTO Takashi, NAKANO Kazuki, NAKAI Shoichi, ISHII Masaru, KINDAICHI Sayaka, YANAGIHARA Ryuji, NAGANO Katsunori, KATSURA Takao, NODA Hiroshi, 学術講演会論文集, 22, 3, 1895, 1898, 12 Aug. 2010
R hospital had started an operation in April, 2008. And it has been started to measure data about heating and cooling system from August 2008. This report is noted data of the ground source heat pump system from Aug 2009. It is noted the summary of commissioning for GSHP system and the results of tuned up the GSHP system setting condition., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Relationship between colors and solar transmittance, reflectance and absorptance of clothing
Kouhei Kuwabara, Hideki Kubota, Yasuhiro Hamada, Katsunori Nagano, Journal of Environmental Engineering, 75, 654, 691, 696, Aug. 2010
Solar transmittance τcl, reflectance ρcl and absorptance αcl of eight different colors of clothing were measured. Solar transmittance increased and reflectance decreased with decreasing solar incidence angle to clothing. Solar absorptance was nearly constant regardless of solar' incidence angle. The relationships between colors of clothing and solar transmittance, reflectance and absorptance were studied. Solar reflectance was expressed as a linear function of Munsell value regardless of hue and chroma. Solar transmittance, reflectance and absorptance were expressed as a function of luminance reflectance Y τcl= 0.146 + 0.0017 Y ρcl = 0.320+ 0.0052 Y, αcl= 0.535 - 0.0069 Y., 日本建築学会, Japanese

41699 A Study on the Floor Supply Air Conditioning system with Building Thermal Mass Storage and Granulated Phase Change Materials
NAKAMURA Takuji, SUZUKI Michiya, NAGANO Katsunori, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-2, Environmental engineering II, Heat, moisture, thermal comfort, natural energy, air flow, ventilation, smoke exhaustion, computational fluid dynamics, indoor air quality heating, cooling and air-conditioning heat and cold sources, piping systems application of building services, 2010, 1423, 1424, 20 Jul. 2010
Architectural Institute of Japan, Japanese

41720 Design Method for the Ground Heat Exchanger's Specification of GSHP system
KATSURA Takao, NAGANO Katsunori, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-2, Environmental engineering II, Heat, moisture, thermal comfort, natural energy, air flow, ventilation, smoke exhaustion, computational fluid dynamics, indoor air quality, 2010, 1465, 1466, 20 Jul. 2010
Architectural Institute of Japan, Japanese

都市型パッシブ住宅と多熱源複合ヒートポンプシステムを利用した環境設備
長野 克則, 空気調和・衛生工学, 84, 7, 582, 583, 05 Jul. 2010
Japanese

「しぶとい日本」の創成に向かって
長野 克則, BE建築設備, 61, 7, 1, 3, Jun. 2010
建築設備綜合協会, Japanese

Study on Hydrogen Storage System for Residential Energy System and Independent Power Supply with Hydrogen Absorbing Alloys and Air Heat Exchange Type Container: Part 2-Effect of Higher Equilibrium Pressure Alloy and Containers with Fins or Small Diameter
SHIRATO HIROYASU, HAMADA YASUHIRO, SUDA TAKANORI, SAKAIRI MASATOSHI, OKA YOSHIAKI, HAYASHI HIROKI, IKEDA HIDEAKI, NAGANO KATSUNORI, 空気調和・衛生工学会論文集, 35, 159, 1, 9, Jun. 2010, [Peer-reviewed]
This paper is the second report of a series of research on a passive type hydrogen storage system with hydrogen absorbing alloys for two purposes. [1] It aims to improve hydrogen absorption and desorption characteristics of the system by using MmNi_5 as a higher equilibrium pressure alloy and containers with fins or small diameter tube type containers that are enlarged the surface area of the containers per MmNi_5 weight. [2] It also aims to investigate possible introduction of the hydrogen system for independent power supply or residential energy system. Both the containers with fins for independent power supply and the small diameter tube type containers for residential energy system are practical from a viewpoint of the hydrogen absorption-desorption flow rate and the total hydrogen storage capacity., The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan, Japanese

ゼロエネ・省エネ住宅の最新動向 多熱源ヒートポンプシステムを導入したパッシブ・ローエネルギー住宅
長野克則, 太陽エネルギー, 36, 2, 11, 16, 31 Mar. 2010
日本太陽エネルギー学会, Japanese

A Passive Low Energy House Integrated with Multi-Source Heat Pump Systems
NAGANO Katsunori, Journal of Japan Solar Energy Society, 36, 2, 11, 16, 31 Mar. 2010
日本太陽エネルギー学会, Japanese

基礎工における地球温暖化対策と省エネ 地中熱利用システムの地球温暖化対策への貢献
長野克則, 基礎工, 38, 1, 015, 020, 15 Jan. 2010
総合土木研究所, Japanese

建物基礎杭を地中熱交換器として利用した地中熱ヒートポンプシステムの性能評価〈札幌市立大学桑園キャンパスを事例として〉
長野克則, 建築設備と配管工事, 48, 1, 70, 76, 05 Jan. 2010
Japanese

A Study on the Energy and the Thermal Characteristics Evaluation of the Building Thermal Mass Storage System with the Phase Change Materials
NAKAMURA TAKUJI, SUZUKI MICHIYA, NAGANO KATSUNORI, 清水建設研究報告, 87, 97, 103, Jan. 2010
清水建設技術研究所, Japanese

地中熱ヒートポンプシステム (建築設備副読本 建築設備の基礎講座「空調編」)
長野 克則, BE建築設備, 61, 2, 221, 233, Jan. 2010
建築設備綜合協会, Japanese

A study on the energy and the thermal characteristics evaluation of the building thermal mass storage system with the phase change materials
中村 卓司, 鈴木 道哉, 長野 克則, Technical research report, Institute of Technology, Shimizu Corporation, 87, 97, 103, Jan. 2010
清水建設技術研究所, Japanese

Relationship between colors of clothing and solar reflectance, transmittance and absorptance.
KUWAHARA KOHEI, IKEDA KOKI, KUBOTA HIDEKI, HAMADA YASUHIRO, NAKAMURA MAKOTO, NAGANO KATSUNORI, 人間-生活環境系シンポジウム報告集, 33rd, 197, 200, 25 Nov. 2009
Japanese Society of Human-Environment System, Japanese

Heat Pump Systems for a Low Energy House
NAGANO KATSUNORI, 冷凍, 84, 984, 831, 836, 15 Oct. 2009
日本冷凍空調学会, Japanese

Heat Pump Systems for a Low Energy House
NAGANO Katsunori, 冷凍, 84, 984, 831, 836, 15 Oct. 2009
日本冷凍空調学会, Japanese

B-14 Analysis of passive low energy house introduced ground source heat pump system
UMEZAWA Hikaru, NAGANO Katsunori, KINUMURA Takashi, NAKAMURA Makoto, 学術講演会論文集, 21, 1, 153, 156, 18 Aug. 2009
This house was constructed in Sapporo City in November 2007 and we have continued to measure every part of system, i.e. power consumption, flow rate and temperature, and also room temperature and humidity since January 2008. This paper is the third report in this series and shows the annual measurement results. First, energy flow of this house is demonstrated. Second, in ventilation system, good effect of earth tube for temperature and Wakkanai siliceous shale for humidity were demonstrated. Finally, we show the evaluation of space heating efficiency and room temperature in case changing the operation time and heat pump output., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-15 Analysis of passive low energy house introduced ground source heat pump system : Part4: Examination of operating condition of low temperature floor heating system by calculation
KINUMURA Takashi, NAGANO Katsunori, UMEZAWA Hikaru, NAKAMURA Makoto, 学術講演会論文集, 21, 1, 157, 160, 18 Aug. 2009
This paper is the fourth of the series that the research on the passive low energy house. We modified the calculation tool to predict the performance of the low temperature radiation heating. This tool calculated the room air temperature of the house introduced the ground-source heat pump system. It was examined that the preferable operating condition which the minimum room temperature was kept above 19℃. Furthermore, we considered the energy reduction effect when simple control methods were introduced., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-11 Application of Ground Source Heat Pump System in an Airport Terminal Building : Part 1 Project plan and performance prediction by computer simulation
KINDAICHI Sayaka, NAGANO Katsunori, IWASHITA Satoru, FURUKOSHI Isao, 学術講演会論文集, 21, 1, 141, 144, 18 Aug. 2009
This paper shows a construction plan of new terminal buildings in the Tokyo International Airport and describes a Ground Source Heat Pump system applied as a part of the heat source system. Annual temperature variations and system performance are verified by computer simulation. Calculations with shorter operating time result in higher performance and annual heat balance in the ground., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-42 A Study on Building Thermal Mass Storage System with Granulated Phase Change Materials : Part3 Apply to the conventional under-floor air distribution system for granulated PCM
KITORA Hisataka, NAGANO Katsunori, KINDAICHI Sayaka, NAKAMURA Takuji, SUZUKI Michiya, 学術講演会論文集, 21, 2, 911, 914, 18 Aug. 2009
This paper is examined about the building thermal mass storage system based on under-floor air distribution system with granulated phase change material by computer simulation. The purpose of simulation is to make clear the operation condition for peak cut of cooling energy. The results show the preservative method for thermal charge of PCM in morning and the rate of air circulation to the room in night for effective charge to PCM., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-40 A Study on Building Thermal Mass Storage System with Phase Change Materials
NAKAMURA Takuji, SUZUKI Michiya, MATSUSITA Keita, MATSUOKA Toshiaki, NAGANO Katsunori, 学術講演会論文集, 21, 2, 903, 906, 18 Aug. 2009
The small scale experiment of building thermal mass storage system based on floor-supply displacement ventilation system with phase change material is carried out in real building. The purpose of experiment is to make clear the efficiency of load balancing using new shape PCM. The results show that the peak-cut ratio from thirteen to fourteen o'clock is 100 % under the room temperature condition at 27℃ and 28℃. There is a relation between the set room temperature and phase change temperature., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

D-66 Water Adsorption/Desorption Performance of Deliquescent-Supported Wakkanai Siliceous Shale : Part 3 - A Study on the Performance Difference due to the Type of Chlorides
NAKABAYASHI Saya, NAGANO Katsunori, NAKAMURA Makoto, KUROKAWA Asami, TOGAWA Junya, 学術講演会論文集, 21, 3, 1951, 1954, 18 Aug. 2009
This study aims at development of desiccant filter for air-conditioning by using Wakkanai siliceous shale (WSS). To improve water adsorption ability of WSS, the chlorides was supported on WSS's surface. From the water adsorption isotherms, the amount of water adsorption of WSS supported with NaCI 5% solution increased to 120 mg/g, however that of the natural WSS was 25 mg/g at the relative humidity in the range from 40% to 70%. It was suggested that this improvement was occurred by the water transport into NaCI caused by capillary condensation of the water in the WSS pores. Furthermore, we confirmed that NaCI-supported WSS adsorbed moisture twice as much as natural WSS from the cyclic test., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-51 Study on Evaluation of Present Performance and Future of Residential Load following : Gas Engine Combined Heat and Power Systems
TAGOMORI Hidetoshi, HAMADA Yasuhiro, WAGATSUMA Yatunori, AMAZAWA Keita, NAGANO Katsunori, GOTO Ryuichiro, NAKAMURA Mitsuru, TAKEDA Kiyotaka, 学術講演会論文集, 21, 3, 1695, 1698, 18 Aug. 2009
This study aims to verify the effectiveness of optimum utilization of residential combined heat and power systems in cold regions for energy conservation. The numerical simulations concerning optimum utilization of residential combined heat and power systems including load following gas engines were carried out, their optimum operation conditions and the effects of the primary energy reduction were evinced., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-48 Study on Evaluation of Residential Combined Heat and Power Systems by Solid Oxide Fuel Cell
AMAZAWA Keita, HAMADA Yasuhiro, TAGOMORI Hidetoshi, WAGATSUMA Yasunori, NAGANO Katsunori, GOTO Ryuichiro, NAKAMURA Mitsuru, TAKEDA Kiyotaka, 学術講演会論文集, 21, 3, 1683, 1686, 18 Aug. 2009
This study aims to verify the effectiveness of optimum utilization of residential combined heat and power systems in cold regions for energy conservation. The numerical simulations concerning optimum utilization of residential combined heat and power systems including fuel cells and gas engines were carried out, their optimum operation conditions and the effects of the primary energy reduction were evinced. In order to verify the availability of power and heat supply system that uses the CHP, we carried out analyses on characteristics of energy demand and the ratio of heat to power., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-47 Study on Evaluation of Residential Combined Heat and Power Systems by Solid Oxide Fuel Cell
GOTO Ryuichiro, NAKAMURA Mitsuru, TAKEDA Kiyotaka, HAMADA Yasuhiro, TAGOMORI Hidetoshi, WAGATSUMA Yasunori, AMAZAWA Keita, NAGANO Katsunori, 学術講演会論文集, 21, 3, 1679, 1682, 18 Aug. 2009
This report describes the evaluation concerning the basic performance of residential combined heat and power systems of fuel cells (SOFC) in the experimental house. Firstly, the part load performance and load following characteristics are shown. Next, test results of start and stop are indicated. Lastly, power generation and exhaust heat recovery characteristic are evaluated., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

A-68 Research for Possibility of Application of the Heating System Using Low Temperature Hot Water : Numerical Simulation Using LCEM Tool for Energy Conservation
KONDO Takeshi, IBAMOTO Tadahiko, YANAGIHARA Ryuji, KINDAICHI Sayaka, NAGANO Katsunori, FUJITA Takuji, 学術講演会論文集, 21, 3, 1675, 1678, 18 Aug. 2009
In this research, the possibility of the heating system using low temperature hot water by air source heat pump was considered. The numerical system simulation was done using LCEM tool for examining the performance of heat pump and air conditioner, and energy conservation effect. As a result, energy consumption was reduced to 81.6% in the case using hot water of 36 degree Celsius compare with the case using hot water of 50 degree Celsius., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-50 Study on Evaluation of Present Performance and Future of Residential Load following : Gas Engine Combined Heat and Power Systems
TAKEDA Kiyotaka, GOTO Ryuichiro, NAKAMURA Mitsuru, WAGATSUMA Yasunori, HAMADA Yasuhiro, TAGOMORI Hidetoshi, AMAZAWA Keita, NAGANO Katsunori, 学術講演会論文集, 21, 3, 1691, 1694, 18 Aug. 2009
This study aims to verify the effectiveness of optimum utilization of residential combined heat and power systems in cold regions for energy conservation. First, the outline is shown about the system itself and experimental condition. Secondly, operation results on representative weeks and the energy-flow are shown. And, the effects of the primary energy reduction are evinced., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

F-34 Model of Predicting Body Temperatures for Protecting Heat Disorder in Hot Environment -Part IX
IKEDA Koki, KUWABARA Kouhei, KUBOTA Hideki, HAMADA Yasuhiro, NAKAMURA Makoto, NAGANO Katsunori, 学術講演会論文集, 21, 2, 1295, 1298, 18 Aug. 2009
In order to protect against heat disorders due to hot environment, the authors have developed formulae for predicting body temperatures, which has the following three equations: 1) core temperature to under steady state when mean skin temperature t_(∞) under steady state is less than or equal to be boundary skin temperature t_ where t_ begins to increase, 2) t_( τ) and t_( τ) from an hour after the beginning of exercising under unsteady state when t_(∞) > t_., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-17 Study on energy environment of totally electrified heating and cooling system in the hospital : (Part3)The summary report of ground source heat pump system operation
WAKAYAMA Hisashi, KINDAICHI Sayaka, ISHII Masaru, NAGANO Katsunori, KATSURA Takao, 学術講演会論文集, 21, 1, 165, 168, 18 Aug. 2009
R hospital had started an operation in April,2008. And it has been started to measure data about heating and cooling system from last summer. The design concept of heating and cooling system and system summary of R hospital had been introduced in the last conference. This report is noted data of the ground source heat pump system and results of analysis. The data of the whole heating and cooling system will be reported soon., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-18 Development of a Low Flow Circulation Ground Source Heat Pump Multi-split System : Part-4 Experimental proof of system cooling performance combined variable water flow control
NAKAMURA Yasushi, KATSURA Takao, FUJIWARA Yozo, OKAWADA Toru, NAGANO Katsunori, 学術講演会論文集, 21, 1, 169, 172, 18 Aug. 2009
Two types of variable water flow control were installed to the low flow circulation ground source heat pump (LF-GSHP) multi-split system in the field experiment. It was demonstrated that one variable water flow control that keeps temperature difference between inlet and outlet of the heat pump unit has advantage from the viewpoint of follow capability of water flow control according to cooling output. The average SCOP during cooling season was 4.51 and the value achieved target SCOP of more than 4.5. Additionally, the LF-GSHP multi-split system combined variable water flow control could reduce approximately 80% of electric power consumption compared to the one with constant flow operation., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-19 Development of a Low Flow Circulation Ground Source Heat Pump Multi-split System : Part-5 Heating performance verification and feasibility study on adoption in cold region
KATSURA Takao, NAKAMURA Yasushi, FUJIWARA Yozo, OKAWADA Toru, NAGANO Katsunori, 学術講演会論文集, 21, 1, 173, 176, 18 Aug. 2009
Heating test of the low flow circulation ground source heat pump (LF-GSHP) multi-split system was carried out in the field and approximately 4.0 of SCOP were obtained on the some conditions. Also, antifreeze solution was applied as the thermal medium instead of water and heating and cooling test were conducted. The LF-GSHP multi-split system with antifreeze solution decreased only less than 15% of SCOP compared to the one with water in the both of heating and cooling experiment. In addition, daily average SCOP during heating operation was 3.33.5 even in the middle of winter season. These show that the LF-GSHP multi-split system has great possibility of adaptation also in the cold region., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-49 Study on residential hydrogen energy system at normal temperature and pressure
IGARASHI Shunsuke, SHIRATO Hiroyasu, HAMADA Yasuhiro, SUDA Takanori, NAGANO Katsunori, GOTO Ryuichiro, NAKAMURA Mitsuru, TAKEDA Kiyotaka, 学術講演会論文集, 21, 3, 1687, 1690, 18 Aug. 2009
This study aims to develop a future energy system using fuel cell, hydrogen and renewable energy in cold regions. We carried out experiments on characteristics of hydrogen storing alloys. First, we made three kinds of samples whose diameters are different, and carried out the experiments on the hydrogen absorption and desoprption. Secondly, we carried out numerical analyses on residential hydrogen energy systems. Thirdly, we selected predict method and analysed the amount of primary energy reduction when it used fuel cell combined heat and power systems. The results suggest that high energy saving effect can be achieved by this method., 社団法人空気調和・衛生工学会, Japanese

消・融雪技術 地中熱利用路盤融雪システムのシミュレーターの開発
長野克則, 日本雪工学会誌, 25, 3, 212, 216, Jul. 2009
Japanese

Technology for Snow-Melting Facilities of Road : Development of Snow Melting System Using Ground Thermal Energy
NAGANO Katsunori, Journal of snow engineering of Japan, 25, 3, 212, 216, 01 Jul. 2009
日本雪工学会, Japanese

住宅用トータルエネルギー予測プログラムの開発
月館司, 村田さやか, 濱田靖弘, 田篭秀俊, 我妻泰憲, 長野克則, 咸哲俊, 北海道立北方建築総合研究所調査研究報告集(CD-ROM), 2008, ROMBUNNO.JUTAKUYOTOTARUENERUGI, May 2009
Japanese

Prediction of mean skin temperature in hot outdoor environment considering sweat efficiency and wet clothing
KUWABARA Kouhei, KUBOTA Hideki, HAMADA Yasuhiro, NAKAMURA Makoto, NAKAYA Noritaka, AMEMIYA Satoshi, NAGANO Katsunori, Transactions of the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan, 34, 144, 1, 10, Mar. 2009, [Peer-reviewed]
The aim of this research is to develop a new human model to predict mean skin temperature for evaluating hot outdoor environments. The model considers effects of solar radiation, sweat efficiency and wet clothing. The effect of solar radiation is given as a "solar operative temperature" defined as a function of net solar radiation absorbed on the surfaces of the skin and clothing after multiple reflections. We have measured solar transmittance and reflectance of some clothing of white T-shirt, navy blue shorts and grey T-shirt in an outdoor environment. A series of experiments using collage age subjects wearing the clothing of white T-shirt and navy blue shorts described above has been conducted outdoors with solar radiation, and mean skin temperatures were measured. Comparison is made between mean skin temperatures of those predicted from the model developed by the authors and those obtained by experiments. It is shown that the new model is valid to predict mean skin temperature in a hot outdoor environment within 0.5K accuracy., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Feasibility Study on Underground Thermal Energy System by using Digital National Land Information
HAMADA Yasuhiro, TANAKA Shinya, NAGANO Katsunori, TAMURA Hiroshi, TAKIGAWA Ikumi, NAKAMURA Yasushi, MARUTANI Kaoru, TAKASHIMIZU Yasuhiro, TAKADA Masayuki, Transactions of the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan, 34, 143, 1, 10, Feb. 2009, [Peer-reviewed]
This paper describes a database on underground thermal characteristics and the groundwater for underground thermal energy use, and it aims to estimate the introduction effect by using the digital national land information. First, we made maps on groundwater level, groundwater velocity, aquifer thickness, mean thermal conductivity, mean heat capacity, ground heat source potential and geology hardness of Sapporo, the south of Sapporo, Asahikawa and Obihiro. Second, the ground heat source potential in terms of product groundwater velocity and aquifer thickness as performance indicator was analyzed. The each percentage of the area ranked A and over was 12% for Sapporo, 36% for the south of Sapporo and Asahikawa, and 19% for Obihiro, respectively., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Study on Applying Wakkanai Siliceous Shale to a Desiccant Material : Part 1 Improving the Water Adsorption/Desorption Rate of Wakkanai Siliceous Shale
TOGAWA Junya, KUROKAWA Asami, NAGANO Katsunori, NAKABAYASHI Saya, NAKAMURA Makoto, 太陽/風力エネルギー講演論文集 = Proceedings of JSES/JWEA Joint Conference, 2008, 197, 200, 06 Nov. 2008
日本太陽エネルギー学会, Japanese

Study on Applying Wakkanai Siliceous Shale to a Desiccant Material : Part 3 : The Controlling the Pore Size Distribution with the Alkali Treatment and the Evaluation of Adsorption/Desorption Performance
KUROKAWA Asami, TOGAWA Junya, NAGANO Katsunori, NAKABAYASHI Saya, NAKAMURA Makoto, 太陽/風力エネルギー講演論文集 = Proceedings of JSES/JWEA Joint Conference, 2008, 205, 208, 06 Nov. 2008
日本太陽エネルギー学会, Japanese

Study on Applying Wakkanai Siliceous Shale to a Desiccant Material, No. 2 : The Improvement of Water Adsorption/Desorption Performance by Supporting Chlorides on the Surface
NAKABAYASHI Saya, NAGANO Katsunori, NAKAMURA Makoto, TOGAWA Junya, KUROKAWA Asami, 太陽/風力エネルギー講演論文集 = Proceedings of JSES/JWEA Joint Conference, 2008, 201, 204, 06 Nov. 2008
日本太陽エネルギー学会, Japanese

B-64 A Study on Building Thermal Mass Storage System with Granulated Phase Change Materials : Part2 Relationship between amount of PCM and characteristics of peak cutting period
NAKAMURA Takuji, SUZUKI Michiya, NAGANO Katsunori, KINDAICHI Sayaka, KITORA Hisataka, NAKAZAWA Kazuhiro, TERASHIMA Takashi, 学術講演会論文集, 20, 3, 1631, 1634, 08 Aug. 2008
This paper is examined about the building thermal mass storage system based on floor-supply displacement ventilation system with granulated phase change material by computer simulation. Which purpose is to make clear the relationship between amount of PCM and the characteristics of peak cutting period. The condition of air supply temperature in morning, characteristics of charging and discharge to the PCM, energy consumption and load balancing is discussed., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

C-32 Feasibility Study on Floor Supply Air Conditioning System Using Phase Change Material (PCM) Encapsulated in a Lamellar Pack : Part2 Experiment of heat accumulation and heat liberation attribute and calculation of indoor thermal environment by numerical simulation
NAGANO Katsunori, TERASHIMA Takafumi, OKABE Sota, NAKAMURA Takuji, MATSUSHITA Keita, 学術講演会論文集, 20, 2, 985, 988, 08 Aug. 2008
High rate of load shifting and comfort thermal environment are demonstrated in a floor supply cooling system utilized thermal energy storage for laminable Phase Change Material (PCM) as well as for building structure with midnight power rate. In Part1, we have investigated heat transfer coefficient experimentally in a box test. In this paper, we have conducted full scale experiment on the heat storage and heat release in actual test room. We have also shown by numerical simulation results that we can cover loads of daytime by heat storage during midnight applied 48 sheets/m^2 laminar PCM under the condition of 13℃ of supply air temperature., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

F-33 Model of Predicting Body Temperatures for Protecting Heat Disorder in Hot Environment -Part VIII
IKEDA Kouki, KUWABARA Kouhei, KUBOTA Hideki, AMEMIYA Satoshi, HAMADA Yasuhiro, NAKAMURA Makoto, NAGANO Katsunori, 学術講演会論文集, 20, 2, 1185, 1188, 08 Aug. 2008
The aim of this research is to protect workers and exercising people from heat disorders by applying hour human model for predicting body temperatures (both core and mean skin temperature), sweating rate and heart rate. In this paper, we compared the reference values of the WBGT heat stress index in ISO-7243 with rectal temperature of 38 degrees C predicted from our human model on temperature-humidity chart, and evaluated the validity of the WBGT index., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

G-7 Water Adsorption/Desorption Performance of Deliquescent-Supported Wakkanai Siliceous Shale : Part 2-Grasping of Maximum Supporting Amount and Water Adsorption/Desorption Performance
NAKABAYASHI Saya, NAGANO Katsunori, NAKAMURA Makoto, TOGAWA Junya, HOKOISHI Tomotsugu, DIVADASTA Agung Ruri, 学術講演会論文集, 20, 2, 1281, 1284, 08 Aug. 2008
This study aims at development of an inorganic filter for air-conditioning by using Wakkanai siliceous shale. To improve water adsorption ability, deliquescent solutions were supported on siliceous shale. Authors have evaluated the maximum supporting amount according to surface's wetted conditions. It was evaluated that these supported materials, particularly supported by lithium chloride, had a good ability for water adsorption under low or middle humidity condition from vapor adsorption isotherm and long-term cyclic test of adsorption and desorption. Furthermore, air circulation using a packed-bed verified that LiCl-supported siliceous shale can absorb moisture and be regenerated by circulation of relative low temperature air., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

C-31 Feasibility Study on Floor Supply Air Conditioning System Using Phase Change Material (PCM) Encapsulated in a Lamellar Pack : Part1 Characterization of thermal property and heat transfer coefficient
NAGANO Katsunori, OKABE Sota, TERASHIMA Takafumi, NAKAMURA Takuji, MATSUSHITA Keita, 学術講演会論文集, 20, 2, 981, 984, 08 Aug. 2008
Conventionally, we have researched granulated PCM in our laboratory. In this paper, we recommend that it's useful to use lamellar PCM in terms of reducing initial cost. The purpose of this study is to characterize thermal property and heat transfer coefficient concerning lamellar PCM from fusing experiment and draft experiment. Through these experiments, we can get the value of latent heat, specific heat, convective heat transfer coefficient and overall heat transfer coefficient. When we calculate by using these values, we can confirm the compliance of the simulation., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-30 Study on Evaluation of Present Performance and Future of Residential Combined Heat and Power Systems in Cold Region
TAGOMORI Hidetoshi, HAMADA Yasuhiro, WAGATSUMA Yasunori, NAGANO Katsunori, GOTO Ryuichiro, NAKAMURA Mitsuru, TAKEDA Kiyotaka, 学術講演会論文集, 20, 2, 833, 836, 08 Aug. 2008
This study aims to find the optimum utilization of CHP systems through the simulation program in cold regions. In order to verify the availability of power and heat supply system that uses the CHP, we carried out analyses on characteristics of energy demand and the ratio of heat to power., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-29 Study on Evaluation of Present Performance and Future of Residential Combined Heat and Power Systems in Cold Region
GOTO Ryuichiro, TAGOMORI Hidetoshi, HAMADA Yasuhiro, WAGATSUMA Yasunori, NAGANO Katsunori, NAKAMURA Mitsuru, TAKEDA Kiyotaka, 学術講演会論文集, 20, 2, 829, 832, 08 Aug. 2008
This study aims to find the optimum utilization of a solid oxide fuel cell CHP system through the simulation program in cold regions. In order to verify the availability of power and hot water supply system that uses the fuel cell CHP, we compare it with various conventional systems., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

I-33 Prediction of Residential Energy Consumption : Part1 Outline of the Numerical Simulation Program
TSUKIDATE Tsukasa, HAMADA Yasuhiro, MURATA Sayaka, TAGOMORI Hidetoshi, WAGATSUMA Yasunori, NAGANO Katsunori, KAN Tetsujun, 学術講演会論文集, 20, 2, 1489, 1492, 08 Aug. 2008
We are developing the simulation program for the prediction of residential energy consumption, carbon dioxide emission and operating cost. In this paper, we describe the simulation models of several equipments used in residences., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

G-17 Evaluation of Indoor Odor Adsorption by using Wakkanai Siliceous Shale
DIVADASTA Agung Ruri, TOGAWA Junya, NAGANO Katsunori, NAKAMURA Makoto, NAKABAYASHI Saya, HOKOISHI Tomotsugu, 学術講演会論文集, 20, 2, 1321, 1324, 08 Aug. 2008
In this study, the adsorption ability of Wakkanai siliceous shale was examined. First, adsorption evaluation of five common odor model gases that are often produced in a household was performed in batch tests. For several hydrophilic gas molecules, Wakkanai siliceous shale showed higher adsorption results than those of commercial adsorbents. In particular, isovaleric acid (IVA) gas was adsorbed significantly at 50% humidity condition. Secondly, flow experiments of IVA were carried out on Wakkanai siliceous shale to compare its adsorption and desorption process. Finally, the authors investigated the application of Wakkanai siliceous shale in plaster wall. The plaster wall containing Wakkanai siliceous shale showed higher adsorption but lower desorption values., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, English

I-34 Prediction of Residential Energy ConsumptionPart 2 Calculation of Cogeneration Systems and Domestic Hot Water Supply Systems
WAGATSUMA Yasunori, HAMADA Yasuhiro, TAGOMORI Hidetoshi, NAGANO Katsunori, TSUKIDATE Tsukasa, MURATA Sayaka, KAN Tetsujun, 学術講演会論文集, 20, 2, 1493, 1496, 08 Aug. 2008
We are developing the simulation program for the prediction of residential energy consumption, carbon dioxide emission and operating cost. In this paper, we describe the simulation models of gas engine cogeneration systems and CO_2 heat pump water heaters., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-53 Study on energy environment of totally electrified heating and cooling system in the hospital : (Part1)The constitution of heating and cooling system, and a concept of the energy-saving technique
WAKAYAMA Hisashi, NAGANO Katsunori, KATSURA Takao, KINDAICHI Sayaka, SAEKI Akihiro, 学術講演会論文集, 20, 3, 1587, 1590, 08 Aug. 2008
The hospital is a representative example of the energy many consumption building type. So first for consideration to the global environment at the planning of this project(R hospital in Chiba pref), I introduced energy-saving technique positively. First of all I planned totally electrified heating and cooling system. I report a summary about a heating and cooling system by this report., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-54 Study on energy environment of totally electrified heating and cooling system in the hospital : (Part2)The summary of the PHC foundation use type ground source HP system
WAKAYAMA Hisashi, ISHII Masaru, NAGANO Katsunori, KATSURA Takao, KINDAICHI Sayaka, 学術講演会論文集, 20, 3, 1591, 1594, 08 Aug. 2008
I assign a focus to ground source HP system on this report, and show results of the numerical analysis about the energy-saving effect by this system. I introduce the progress of real construction. I report about the result of thermal response test that I carried out to predict performance after the completion., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

D-48 Development of a Low Flow Circulation Ground Source Heat Pump Multi-split System : Part-1 Outlines of plan for the development and system concept
NAKAMURA Yasushi, KATSURA Takao, FUJIWARA Yozo, NAGANO Katsunori, 学術講演会論文集, 20, 3, 1831, 1834, 08 Aug. 2008
In order to promote installation of the ground source heat pump (GSHP) system to the medium-scale building in moderate climate region, the authors have developed a low flow circulation (LF) GSHP multi-split system. This system applies low flow and large temperature difference circulation system in primary side and multi-split system in secondary side and can reduce energy consumption for circulating the thermal medium. In this paper, the authors firstly introduce plan for the development and the system concept. Also, outlines of the field test of the low flow circulation ground heat exchangers and LF-GSHP multi-split system, which has been conducted in since Nov. 2006, is described., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

D-49 Development of a Low Flow Circulation Ground Source Heat Pump Multi-split System : Part-2 Field experiment to investigate performance of the GHEX applying low flow circulation
OKAWADA Toru, KATSURA Takao, NAKAMURA Yasushi, FUJIWARA Yozo, HORI Shogo, NAGANO Katsunori, 学術講演会論文集, 20, 3, 1835, 1838, 08 Aug. 2008
Field experiment with foundation piles as ground heat exchangers (GHEX) applying low flow circulation (LF) has been carried out since October 2006 in order to develop the LF-GHEX. The LF-GHEX can extract or inject nearly equal heat to the conventional GHEX even in a case where the low flow circulation system is adopted in the primary side. As the result, the authors confirmed that several GHEXs with flow rate of 8L/min extracted nearly equal heat to the conventional one with flow rate of 16L/min. In addition, the variation of temperature calculated by a simulation program for the GHEX could reproduce the measured one., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

D-50 Development of a Low Flow Circulation Ground Source Heat Pump Multi-split System : Part-3 Field experiment to investigate performance of the LF-GSHP system during cooling and heating operation
KATSURA Takao, NAKAMURA Yasushi, FUJIWARA Yozo, HORI Shogo, OKAWADA Toru, NAGANO Katsunori, 学術講演会論文集, 20, 3, 1839, 1842, 08 Aug. 2008
Field experiment of a low flow circulation ground source heat pump (LF-GSHP) multi-split system has been carried out since June 2006 in order to validate the result of laboratory experiment and prepare fundamental performance data of the multi-split heat pump. Cooling output and COP of the heat pump obtained in the field experiment in which heating output and flow late of thermal medium in the primary side were kept constant are close to those in the laboratory experiment. In addition, by using the experimental data, the authors approximated relation between COP and each parameter, which is inlet temperature in the primary side, cooling output, and flow rate., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

D-51 Assessment of a Ground Source Heat Pump System in Soen Campus of Sapporo City University : Part-3 Assessment of operation during the second heating and cooling period and comparison to those of the first period
HORI Shogo, NAGANO Katsunori, KATSURA Takao, 学術講演会論文集, 20, 3, 1843, 1846, 08 Aug. 2008
This paper constitutes Part 3 in the series of assessment of a ground source heat pump (GSHP) system in Soen campus of Sapporo City University. In this paper, the authors introduce the performance of GSHP system operation in second year. In addition, the first and second year of GSHP system's performances were compared. As a result of comparison, it is shown that SCOP of GSHP system has improved. Especially, during heating period, SCOP has improved from 2.52 to 3.22. We show the cyclic temperature variation of inside piles. From that, it is confirmed that sustainable heating and cooling can be operated., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-38 Study on an urban passive low energy house integrated with ground source heat pump system : Part1 Planning and designing of the urban passive low energy house and functions
NAGANO Katsunori, UMEZAWA Hikaru, KATSURA Takao, HORI Shogo, NAKAMURA Makoto, 学術講演会論文集, 20, 2, 865, 868, 08 Aug. 2008
A passive low energy house integrated with ground heat pump system has been constructed in the urban area of Sapporo. Our group has joined the planning and designing of this new low energy house since November 2006 and is now conducting the commissioning. This paper is the first report in the series of the research on a new urban passive low energy house. First, the authors describe the designing concept and show some new passive ideas and active technologies introduced in this house. From the estimated annual energy consumption and the energy flow it is estimated that this low energy house satisfies the requirement to meet the "MINERGY" certification which is the regulation of a low energy house in Switzerland., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-39 Study on an urban passive low energy house integrated with ground source heat pump system : Part2 Performance of GSHP systems and evaluation of indoor thermal environment
UMEZAWA Hikaru, NAGANO Katsunori, KATSURA Takao, HORI Shogo, NAKAMURA Makoto, 学術講演会論文集, 20, 2, 869, 872, 08 Aug. 2008
The objective of this research is to join the plan for constructing 'passive low energy house in the urban area', which 〓eans annual house energy consumption is very low, and to measure the performance of equipments and quality of room air. This house is introduced Ground Source Heat Pump (GSHP) system for space heating, cooling, domestic hot water supply (DHW) and snow melting. Also it has a solar collector for DHW pre-heating and photo voltaic system for generating electricity. Furthermore, exhaust air is recovered by GSHP system primary side temperature in addition to boreholes. In this report, we describe the performance of every GSHP systems and the result of measurement indoor thermal environment, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Autonomous Humidity Conditioning
NAGANO KATSUNORI, 空気調和・衛生工学, 82, 8, 679, 684, 05 Aug. 2008
空気調和・衛生工学会, Japanese

Autonomous Humidity Conditioning
NAGANO Katsunori, 空気調和・衛生工学, 82, 8, 679, 684, 05 Aug. 2008
空気調和・衛生工学会, Japanese

深夜電力利用型で既存太陽光発電システムにも後付けできる省エネルギー・低コスト融雪機能システムの構築
長野 克則, TC研究助成成果報告書, 2007, 19, 39, Jun. 2008
雪センター, Japanese

Study on Hydrogen Storage System for Residential Energy System and Stand-Alone Power Supply with Hydrogen Absorbing Alloys and Air Heat Exchange Type Container: Part 1-Hydrogen Absorption and Desorption Behavior of Hydrogen Storage System with Hydrogen Ab
SHIRATO HIROYASU, HAMADA YASUHIRO, SUDA TAKANORI, SAKAIRI MASATOSHI, OKA YOSHIAKI, HAYASHI HIROKI, IKEDA HIDEAKI, NAGANO KATSUNORI, 空気調和・衛生工学会論文集, 33, 134, 11, 19, May 2008, [Peer-reviewed]
In this thesis, the hydrogen absorption and desorption behavior of the Hydrogen Storage System with hydrogen absorbing alloys and the air heat exchange type container for residential energy system and stand-alone power supply was cleared. When the pressure difference between the alloy equilibrium dissociation pressure and piping was 0.1MPa or more, the hydrogen desorption characteristic of this system was excellent. When the absorption rate was 0.8MPa, the hydrogen storage capacity was dependant on the room temperature and the absorption rate. And it was showed that this system could have the extensive hydrogen storage capacity in the condition of the room temperature 5, 20℃ and the absorption flow rate 0.1NL/(min・kg), or the room temperature 35℃ and the absorption flow rate 0.025, 0.05NL/(min・kg)., The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan, Japanese

A Study on a Design and Performance Prediction Tool for the Ground Source Heat Pump System: Part3-Calculation Algorithm of the Temperatures for Pipe Arrangement of Multiple Ground Heat Exchangers and Its Application
KATSURA TAKAO, NAGANO KATSUNORI, KINDAICHI SAYAKA, NAKAMURA YASUSHI, 空気調和・衛生工学会論文集, 33, 134, 1, 10, May 2008, [Peer-reviewed]
This paper constitutes Part3 in the series of studies that aim at development of a design and performance prediction tool for the ground source heat pump (GSHP) system. The authors introduce calculation algorithm of the temperatures of the ground and heat carrier fluid in multiple ground heat exchangers for pipe arrangement of the GSHP system. Next, performance of GSHP systems with steel foundation piles is predicted with the design tool. In moderate climate region, since the GSHP systems using multiple ground heat exchangers with short length can operate with high efficiency as well as the GSHP system using a single ground heat exchanger with long length, the GSHP system with steel foundation piles has possibility to become popular. In addition, the authors investigated temperatures of the ground, thermal medium, and system performance according to the interval of the ground heat exchangers when annual heat extraction from the ground is equal to annual heat injection. The calculation results show that the applicable interval is 2m for the small-scale building. In a case where the large-scale building adopts the GSHP system with multiple ground heat exchangers, the adequate intervals for linear and lattice arrangement are 2m and 3m, respectively., The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan, Japanese

Report of 2007JEES/JWEA annual conference
NAGANO Katsunori, Journal of Japan Solar Energy Society, 34, 1, 57, 60, 31 Jan. 2008
日本太陽エネルギー学会, Japanese

「地球温暖化対策」第2回 地中熱源ヒートポンプシステム
長野克則, 設備設計, 449, 18, 24, 10 Jan. 2008
Japanese

地中熱ヒートポンプ暖冷房 給湯システムを導入したパッシブローエネルギー住宅に関する研究 その2
長野克則, 空気調和 衛生工学会平成20年度大会論文集, B, 39, 2008

建築設備の基礎講座 II「空気調和編」(10)地中熱ヒートポンプシステム
長野克則, 建築設備, 58, 13, 45, 57, 01 Dec. 2007
建築設備綜合協会出版部, Japanese

設備講座 建築設備の基礎講座2 空気調和編(10)地中熱ヒートポンプシステム
長野 克則, BE建築設備, 58, 13, 45, 57, Dec. 2007
建築設備綜合協会出版部, Japanese

Application of Natural Nano-porous Material Produced in Hokkaido to Reduce Heat Island Phenomena
WANPHEN Surakha, NAGANO Katsunori, NAKAMURA Makoto, TOGAWA Junya, 太陽/風力エネルギー講演論文集 = Proceedings of JSES/JWEA Joint Conference, 2007, 129, 132, 25 Oct. 2007
日本太陽エネルギー学会, English

Performance Evaluation of an Actual Low Energy House with Ground Source Heat Pump System
HORI Shogo, NAGANO Katsunori, TAKEDA Sayaka, KATSURA Takao, SHIBATA Kazuo, Proceedings of JSES/JWEA Joint Conference, 2007, 313, 316, 25 Oct. 2007
日本太陽エネルギー学会, Japanese

Assessment of a ground source heat pump system in Soen Campus of Sapporo City University
NAGANO Katsunori, KATSURA Takao, TAKEDA Sayaka, HORI Shogo, KOTANI Tsutomu, SEKIYAMA Masato, SAITO Akio, Proceedings of JSES/JWEA Joint Conference, 2007, 317, 320, 25 Oct. 2007
日本太陽エネルギー学会, Japanese

Development of equipment for measurement of ground water direction and velocity
KATSURA Takao, NAGANO Katsunori, TAKEDA Sayaka, NAKAMURA Yasushi, Proceedings of JSES/JWEA Joint Conference, 2007, 333, 336, 25 Oct. 2007
日本太陽エネルギー学会, Japanese

B-35 Study on Evaluation of Present Performance and Future of Residential Cogeneration Systems in Cold Region
NAKAMURA Mitsuru, HAMADA Yasuhiro, YOSHIMURA Fumitoshi, TAGOMORI Hidetoshi, NAGANO Katsunori, GOTO Ryuichiro, 学術講演会論文集, 19, 2, 843, 846, 24 Aug. 2007
This report describes numerical analysis and the field experiments in the experimental house concerning low temperature water heating and the heating utilizing exhaust heat of fuel cells (PEFC). Firstly, the possibility of low temperature hot water heating is shown. Secondly, relation between outside air temperature, heating water supply temperature and indoor temperature is indicated., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-38 Study on Evaluation of Present Performance and Future of Residential Cogeneration Systems in Cold Region
YOSHIMURA Fumitoshi, HAMADA Yasuhiro, TAGOMORI Hidetoshi, NAGANO Katsunori, GOTO Ryuichiro, NAKAMURA Mitsuru, 学術講演会論文集, 19, 2, 855, 858, 24 Aug. 2007
In this report, the numerical simulation on the optimum utilization of residential hybrid cogeneration systems utilizing fuel cells is carried out. The optimum operation situation in the system and the effect of the energy consumption reduction are evinced. Additionally, the similar simulation is conducted that utilizing highly capable fuel cells at present stage, the energy conservation of the advanced system is evaluated., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

C-50 Feasibility Study of Air Conditioning System Separating Dehumidification Using Low Temperature Exhaust Heat
OKABE Sota, NAGANO Katsunori, TAKEDA Sayaka, 学術講演会論文集, 19, 2, 1011, 1014, 24 Aug. 2007
The aim of this study is to develop an air conditioning system in which dehumidification is separated from the cooling process. Wet air is dehumidified by honeycomb desiccant materials. The adsorbed vapor is then desorbed by using low temperature exhaust heat obtained from thermal energy storage. The mass transfer coefficient of a honeycomb desiccant material is estimated at 1.0x10^<-5> m/s by an experiment. It is found that a two-step desiccant process enables to decrease the temperature of regeneration to 53 ℃, whereas a single desiccant process needs the temperature of 90 ℃. The use of the exhaust heat can lead to reduction of energy consumption for regeneration about 26 % in such a dehumidification system., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-44 Study on residential hydrogen energy system at normal temperature and pressure
SHIOZAWA Takuma, HAMADA Yasuhiro, SUDA Takanori, SUZUKI Shuhei, NAGANO Katsunori, GOTO Ryuichiro, NAKAMURA Mituru, 学術講演会論文集, 19, 2, 879, 882, 24 Aug. 2007
This study aims to establish hydrogen storage and supply system for residence. We devised new hydrogen system without heat exchange to supply and store hydrogen, which has better energy efficiency than conventional hydrogen storage system. Firstly, hydrogen absorbing alloys were selected as a hydrogen storage material which is easy to handle (no heat exchange) and safer to use (at normal pressure).Characteristics of hydrogen supply and storage were examined by an experiment. Secondly, basic hydrogen supply and storage performance tests of the system were conducted. Finally, the hydrogen powered fuel cell was operated by the system to determine duration time of constant hydrogen supply. The results suggested that the system can operate hydrogen powered fuel cell at normal temperature and pressure., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-36 Study on Evaluation of Present Performance and Future of Residential Cogeneration Systems in Cold Region
TAGOMORI Hidetoshi, HAMADA Yasuhiro, YOSHIMURA Fumitoshi, NAGANO Katsunori, GOTO Ryuichiro, NAKAMURA Mitsuru, 学術講演会論文集, 19, 2, 847, 850, 24 Aug. 2007
This study aims to find the optimum utilization of fuel cell cogeneration system including space heating through the simulation program in cold regions. In order to verify the availability of power, hot water and heating supply system that uses fuel cell cogeneration, we compare it with various conventional systems., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-37 Study on Evaluation of Present Performance and Future of Residential Cogeneration Systems in Cold Region
HAMADA Yasuhiro, YOSHIMURA Fumitoshi, TAGOMORI Hidetoshi, NAGANO Katsunori, GOTO Ryuichiro, NAKAMURA Mitsuru, 学術講演会論文集, 19, 2, 851, 854, 24 Aug. 2007
This study aims to examine possibility of efficient utilization of exhaust heat from fuel cells (PEFC) in summer. The numerical simulation and the demonstration experiment are conducted concerning residential hybrid fuel-cell cogeneration systems in consideration of utilization of exhaust heat from fuel cells for cooling, the contributing ratio of fuel cells for electricity demand and the effect of energy conservation are evaluated., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-34 Study on Evaluation of Present Performance and Future of Residential Cogeneration Systems in Cold Region
GOTO Ryuichiro, TAGOMORI Hidetoshi, HAMADA Yasuhiro, YOSHIMURA Fumitoshi, NAGANO Katsunori, NAKAMURA Mitsuru, 学術講演会論文集, 19, 2, 839, 842, 24 Aug. 2007
This study aims to find the optimum utilization of fuel cell cogeneration system through the simulation program in cold regions. In order to verify the availability of power and hot water supply system that uses the fuel cell cogeneration, we compare it with various conventional systems., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

G-30 Improvement of VOC adsorption performance by using modified Wakkanai Siliceous Shale
NAGANO Katunori, ADACHI Takuya, NAKAMURA Makoto, TOGAWA Junya, 学術講演会論文集, 19, 2, 1351, 1354, 24 Aug. 2007
This objective is to improve the VOC adsorption performance of Wakkanai siliceous shale modified by alkaline etching method. Toluene was used as a model of VOC gas. It was found that the toluene adsorption amount decreased with increasing the relative humidity, because of competitive adsorption between the toluene and water on the pore surface. However, the toluene adsorption amounts were improved by the modification with 1.5 and 2 mol/l of NaOHsolution. It may be conclude that the VOC adsorption enhancement was supported by the formation of meso-pore less than 25Å, which is unaffected by the water adsorption., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

F-38 Model of Predicting Body Temperatures for Protecting Heat Disorder in Hot Environment -Part IV
NAKAYA Noritaka, KUWABARA Kouhei, KUBOTA Hideki, HAMADA Yasuhiro, NAKAMURA Makoto, AMEMIYA Satoshi, NAGANO Katsunori, 学術講演会論文集, 19, 2, 1283, 1286, 24 Aug. 2007
The aim of this research is to evaluate hot outdoor environment by applying our human model for predicting body temperatures (both core and mean skin temperature) and sweating rate. In this paper, we have introduced "solar operative temperature" considering solar radiation absorbed on clothing and skin surface, and measured solar transmittance, reflectance of clothing., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

G-32 Characterization of VOC adsorption in wastewater by using Wakkanai siliceous shale
NAGANO Katunori, TOGAWA Junya, NAKAMURA Makoto, 学術講演会論文集, 19, 2, 1359, 1362, 24 Aug. 2007
This study aims to estimate the performance of the VOC adsorption in wastewater by using Wakkanai siliceous shale. To evaluate the VOC adsorption amount, we use tetrachloroethylene (PCE) as a model of VOC in wastewater. For improving adsorption performance, modification of Wakkanai siliceous shale using organic silane agent was carried out. The adsorption amount of modified material was 5.7 times larger than that of the original rock. In addition, to evaluate the ability of regeneration, PCE-saturated modified material was heated at 150℃. The result was almost the same as before regeneration material., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

F-40 Model of Predicting Body Temperatures for Protecting Heat Disorder in Hot Environment-PartVI
AMEMIYA Satoshi, KUWABARA Kouhei, KUBOTA Hideki, HAMADA Yasuhiro, NAKAMURA Makoto, NAKAYA Noritaka, NAGANO Katsunori, 学術講演会論文集, 19, 2, 1291, 1294, 24 Aug. 2007
The aim of this research is to propose a model for predicting heart rate in hot environment by applying our model for predicting body temperatures (both core and mean skin temperature), sweating rate. The predicted body temperatures and heart rate will be used as an index for evaluating hot environment, and for protecting people working and exercising from a physiological disorder caused by heat. In this paper, we have proposed an equation on heart rate expressed as a function of skin temperature and VO_<2max> considering an individual variability of athletic performance. The variation of human sweating rate has appeared not only between individual subjects but also between the same subjects., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

G-31 Water Absorption/Desorption Performance of Deliquescent-Modified Wakkanai Siliceous Shale
NAKABAYASHI Saya, NAGANO Katsunori, NAKAMURA Makoto, TOGAWA Junya, 学術講演会論文集, 19, 2, 1355, 1358, 24 Aug. 2007
This study is aimed at the functional improvement of Wakkanai siliceous shale which has autonomous humidity controlling function in order to use as dehumidification material. The deliquescent-modified Wakkanai siliceous shale was obtained by impregnating with various concentration of lithium chloride or calcium chloride solution.Those materials were investigated the change of specific surface area, pore size distribution, water vapor absorption/desorption isotherm including their vapor absorption responses to the periodical temperature and relative humidity operation. Furthermore, the possibility to apply as dehumidification material was also evaluated., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-65 Feasibility Study on Underground Thermal Energy System by using Digital National Land Information
TANAKA Shinya, HAMADA Yasuhiro, NAGAHIRO Kentaro, NAGANO Katsunori, TAMURA Hiroshi, TAKIKAWA Ikumi, NAKAMURA Yasushi, MARUTANI Kaoru, 学術講演会論文集, 19, 3, 1777, 1780, 24 Aug. 2007
This study describes analyses on characteristics of underground and it's thermal energy potential by using digital national land information. We made maps that show the introduction potential of the under ground thermal energy system in Asahikawa by using geographic information system(GIS)., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-63 Study on a Ground Snow Melting Tank Using Rotating Press-in Steel Pile : Part 4 Snow melting performance by snow charge with water spray
TERASHIMA Takashi, NAGANO Katsunori, TAKEDA Sayaka, IBAMOTO Tadahiko, NARITA Shigeaki, NAKAMURA Yasushi, 学術講演会論文集, 19, 3, 1769, 1772, 24 Aug. 2007
Field experiments have been carried out in the Hokkaido region with Ground Snow Melting Tanks (GSMT). Larger amount of snow can be charged by the use of shower. The total amount of snow melting is around 15.3 tons in 39 days when snow is shoveled periodically by a snow blower with the shower and nearly filled in the GSMT. The result of a numerical calculation indicates that the use of the shower can increase the snow melting performance., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-66 Report on Monitoring of GSHP System of Residence in Very Cold Climate Terrain
NARITA Shigeaki, NAGANO Katsunori, TAKEDA Sayaka, NIKI Kohsuke, 学術講演会論文集, 19, 3, 1781, 1784, 24 Aug. 2007
An increasing number of residential houses are using Ground Source Heat Pump systems all over the country in these years. It is well known the system is more effective particularly in cold climate terrain. However, there are few studies on monitoring the operation through years in an actually occupied house. We now carry on measuring the performance of a detached house in Furano City, which is one of the coldest district in Japan. This is a report on the result of the first year., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

C-54 A Study on Building Thermal Mass Storage System with Granulated Phase Change Materials : Part1 Discussion about amount of PCM and thermal characteristics during peak cutting period
NAKAMURA Takuji, NAGANO Katsunori, TAKEDA Sayaka, OKABE Sota, YAMAGIWA Masashi, KAKUTANI Satoru, SUZUKI Michiya, 学術講演会論文集, 19, 3, 1817, 1820, 24 Aug. 2007
The aim of this study is to develop an air conditioning system in which dehumidification is separated from the cooling process. In this part, we discuss the needed amount of PCM and thermal characteristics during the peak cutting period in the PCM floor supply air conditioning system. The use of PCM more than 6 kg/m^2 can provide continuous discharge from PCM and then sufficient effect of peak cutting throughout cooling season. The result of the calculation also demonstrates the comfortable thermal environment in the room space., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-59 Measurement of Heating and Ventilation Performances and Indoor Thermal Environment in an Actual Low Energy House
NAGANO Katsunori, HORI Shogo, TAKEDA Sayaka, NAKAMURA Makoto, IBAMOTO Tadahiko, NARITA Shigeaki, KATSURA Takao, SHIBATA Kazuo, NIKI Kousuke, 学術講演会論文集, 19, 3, 1753, 1756, 24 Aug. 2007
The objective of this paper is to describe the performance of Ground Source Heat Pump (GSHP) system for heating and ventilation applied in an actual low energy house. Recently, in Japan, GSHP systems have been introduced, however only few of them have been demonstrated their efficiency. Firstly we investigated the performance of GSHP system which is applied to the actual low energy house of cold region by actual inspection. Secondly, ventilation system with earth tube was observed its efficiency. From the inspection, the system showed satisfied performance in terms of energy conservation., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-64 Development of an Integrated Heat Pump System with Combined Heat Source for the Low Energy House and Its Application : Part-1 Performance test and analysis by using cycle simulation of an integrated water-water heat pump unit
NAGANO Katsunori, TSUCHIYA Atsushi, KATSURA Takao, NAKAMURA Makoto, TAKEDA Sayaka, NARITA Shigeaki, 学術講演会論文集, 19, 3, 1773, 1776, 24 Aug. 2007
In this paper, the authors have carried out performance test and analysis of an integrated water-water heat pump unit. First, performance tests of the heat pump unit were conducted. The results show the outputs for hot water supply and heating in any condition are more than 1.6 kW and 7.0 kW, respectively when the compressor rotational speed is 5400 rpm. Next, cycle simulation program of the heat pump unit was developed to examine the experimental results more detail. As a result, it was confirmed that the value calculated by the cycle simulation reproduced the value obtained by the performance test when the compressor rotational speeds were 3600 rpm and 5400 rpm in conditions of T_<1in>=0℃ and T_<2out>=40℃., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-67 Assessment of a Ground Source Heat Pump System in Soen Campus of Sapporo City University : Part-1 Outline of the ground source heat pump system and assessment of operation during cooling period
TAKEDA Sayaka, NAGANO Katsunori, KATSURA Takao, HORI Shogo, IBAMOTO Tadahiko, NARITA Shigeaki, 学術講演会論文集, 19, 3, 1785, 1788, 24 Aug. 2007
A ground source heat pump (GSHP) system has been installed into a new building in the Soen campus of Sapporo City University. The ground thermal energy is extracted through the ground heat exchanger, steel foundation piles and boreholes and utilized in the ventilation system for heating and cooling of fresh air. The extracted heat is increased through the heat pump in the heating period. On the other hand, the cold energy from the ground is directly utilized for free cooling without the heat pump in the first year's operation in 2006. This paper describes the system flow and the result of the free cooling operation during summer. It is predicted that changes of operating conditions of the circulating pumps will lead to increase the system COP to around 3.0., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

B-68 Assessment of a Ground Source Heat Pump System in Soen Campus of Sapporo City University : Part-2 Assessment of operation during heating period and comparison to calculation result by using design tool
KATSURA Takao, NAGANO Katsunori, TAKEDA Sayaka, HORI Shogo, IBAMOTO Tadahiko, NARITA Shigeaki, 学術講演会論文集, 19, 3, 1789, 1792, 24 Aug. 2007
This paper constitutes Part2 in the series of assessment of a ground source heat pump (GSHP) system in Soen campus of Sapporo City University. In this paper, the authors introduce performance and refinement of the GSHP system operation during heating period. In addition, it is shown that the measured temperatures can be reproduced by the calculation with the design tool. Finally, total assessment of the GSHP system is conducted. Then, it is expected that the GSHP can operate with high efficiency long term. From comparison to gas boiler system, the GSHP system can reduce CO_2 emissions and running cost of 40 % and 60 %, respectively., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Ground Thermal Energy System
NAGANO KATSUNORI, 空気調和・衛生工学, 81, 7, 545, 552, 05 Jul. 2007
Japanese

Ground Thermal Energy System
NAGANO Katsunori, 空気調和・衛生工学, 81, 7, 545, 552, 05 Jul. 2007
空気調和・衛生工学会, Japanese

地中熱利用 我が国における地中熱利用の現状―北海道での導入事例を中心として
長野克則, 伝熱, 46, 196, 42, 48, Jul. 2007
日本伝熱学会, Japanese

Ground Thermal Energy Systems in Japan : Evaluation of actual GSHPs in Hokkaido
NAGANO Katsunori, Journal of the Heat Transfar Society of Japan, 46, 196, 42, 48, 01 Jul. 2007
日本伝熱学会, Japanese

回転圧入鋼管基礎杭を用いたゼロエネルギー型道路融雪槽の導入・普及について
長野 克則, TC研究助成成果報告書, 2006, 35, 39, May 2007
雪センター, Japanese

ローエネルギーハウスにおける暖房 換気性能および室内温熱環境の実測
長野克則, 空気調和 衛生工学会北海道支部第41回学術講演会論文集, 2007, 2007

基礎杭方式地中熱利用システムの計画と設計方法について
長野克則, 各種杭を利用した地中熱利用シンポジウム, 2007. 12. 18, 2007
地中熱利用促進協会

063 Experiments on solar transmittance, reflectance and absorptance of clothing
KUWABARA Kouhei, 日本建築学会北海道支部研究報告集, 80, 263, 264, 2007
Architectural Institute of Japan, Japanese

回転圧入鋼管基礎杭を用いたゼロエネルギー型道路融雪槽の導入・普及について (特集 環境にやさしい消融雪技術への挑戦)
長野 克則, ゆき, 66, 48, 54, Jan. 2007
雪センタ-, Japanese

Radiation property for the human body in outdoor environment
KUWABARA Kouhei, NAGANO Katsunori, MOCHIDA Tohru, HAMADA Yasuhiro, Proceedings of the ... Symposium on Human-Environment System, 30, 155, 158, 01 Dec. 2006
In order to calculate heat exchange by radiation between the human body and an outdoor environment, we proposed new expression of radiative heat exchange equation between the human body and an outdoor environment without calculating atmospheric radiation. We defined the long-wave radiation property of the human body for considering the effect of atmospheric radiation, and verified the property by qualitative analysis. Coefficients of the long-wave radiation property were calculated using measured values obtained from human experiments. The ratio of atmospheric radiation to long-wave radiation from the ground was defined as functions of global solar radiation in daytime and ground temperature at night. The property based on these functions made it possible to calculate the radiative heat exchange equation only from ground temperature and global solar radiation, Japanese Society of Human-Environment System, Japanese

屋外空間の人体に対する放射特性
桑原浩平, 長野克則, 持田徹, 濱田靖弘, 人間-生活環境系シンポジウム報告集, 30th, 155, 158, 01 Dec. 2006
Japanese

屋外環境と人体との間の熱収支式における長波長・短波長放射の表現法
桑原浩平, 長野克則, 持田徹, 濱田靖弘, 人間-生活環境系シンポジウム報告集, 30th, 323, 326, 01 Dec. 2006
We verified the property of an effective radiant temperature based on direct radiation using an effective radiant temperature based on multiple radiations. The difference between two formulae was within ±1 ℃ when short-wave reflectance of buildings' surface was less than 4 ℃ and the temperature difference between building surface and ground surface was within 5 ℃. The ratio of atmospheric radiation to long-wave radiation from the ground was newly defined as long-wave radiation property. Expression of linearized radiative heat transfer between the human body and outdoor environment was defined using the property., Japanese Society of Human-Environment System, Japanese

Computer Simulation of Operation of Snow Melting System for Pavement using Ground Source Heat Pump
TAKEDA Sayaka, NAGANO Katsunori, KATSURA Takao, Proceedings of JSES/JWEA Joint Conference, 2006, 219, 222, 12 Oct. 2006
日本太陽エネルギー学会, Japanese

Development of a Design and Performance Prediction Tool for the Ground Thermal Energy System with Ground Water Flow
KATSURA Takao, NAGANO Katsunori, TAKEDA Sayaka, NAKAMURA Yasushi, Proceedings of JSES/JWEA Joint Conference, 2006, 353, 356, 12 Oct. 2006
日本太陽エネルギー学会, Japanese

Feasibility Study of the Ground Thermal Energy System with a Design and Performance Prediction Tool
NAGANO Katsunori, KATSURA Takao, TAKEDA Sayaka, NAKAMURA Yasushi, Proceedings of JSES/JWEA Joint Conference, 2006, 357, 360, 12 Oct. 2006
日本太陽エネルギー学会, Japanese

Method of Calculation of the Ground Temperature with Ground Water Flow and Its Application
KATSURA Takao, NAGANO Katsunori, TAKEDA Sayaka, NAKAMURA Yasushi, Transactions of the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan, 31, 115, 9, 17, Oct. 2006, [Peer-reviewed]
This paper shows method of calculation of the ground temperature with ground water flow and its application. First, method of calculation of the thermal response surrounding cylindrical heat source in the ground with ground water advection is shown based on comparing the thermal response for the cylindrical heat source with the one for line source. Next, the method's preciseness is verified by comparing thermal response calculated by this method and numerical calculation on condition that two ground heat exchangers are used. In addition, the impact that the ground water flow effects performance of the GSHP system and installation advantage is examined with the developed tool including this method. As the results of simulation of the GSHP system operation and cost analysis in case where the GSHP system with single ground heat exchanger is installed to a residential house in Sapporo, it is shown the ground heat exchanger of 45m is reduced for calculated condition that the ground water velocity in all ground layer is 100m/year. This result indicates that considering the ground water flow for the design of the GSHP system contributes to the reduction of the initial cost of the GSHP system., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

C-41 Study on a Ground. Snow Melting Tank Using Rotating Press-in Steel Pile : Part 3 Field experiments for practical use
TERASHIMA Takafumi, NAGANO Katsunori, TAKEDA Sayaka, NAKAMURA Yasushi, 学術講演会論文集, 18, 2, 965, 968, 05 Sep. 2006
Snow melting performance is increased by throwing snow into a cylinder simulated Ground Snow Melting Tank (GSMT), with mixing water in the cylinder in laboratory experiments. Field experiments are then conducted with a steel pile of 1200 mmφ. The performance is analyzed quantitatively by experiments, in which snow is shoveled periodically by a snow blower for practical use and nearly filled in the GSMT. The total amount of snow melting is around 13 t in 41 days and can be reproduced by a theoretical analysis. The analysis also predicts that two GSMTs with 30 m long are needed for one corner of a two-lane road or six residential houses in case of a ground temperature of 10℃., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

C-21 Study on the Floor Supply Air Conditioning System in Building Structure Thermal Storage with Granulated Phase Change Material : Part 7 Demonstration of cooling operation in summer season
NAKAYAMA Kazuki, NAGANO Katsunori, TAKEDA Sayaka, SHIMAKURA Kazumi, NAKAMURA Takuji, 学術講演会論文集, 18, 1, 255, 258, 05 Sep. 2006
High rate of load shifting and comfort thermal environment are demonstrated in a floor supply cooling system utilized thermal energy storage for granular Phase Change Material (PCM) as well as for building structure with midnight power rate. Calculations intended for an environmental testing room of 9.2m^2 predict that air conditioners aren't operated at all during the daytime in conditions of supply air temperatures around 12 to 13℃. Experiments in the room with the temperature of 12.5℃ can result in cold storage of 2.38 MJ/m^2 in the nighttime and complete load shifting. They also provide comfort thermal environment even in the morning owing to the effect of temperature stabilization of PCM., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

C-46 Field Experiment on Heat Extraction from the Ground with Ground Water Flow : Part 1 Outline of the experimental system and performance of heat extraction
TAKEDA Sayaka, NAGANO Katsunori, KATSURA Takao, SHIMAKURA Kazumi, NAKAMURA Yasushi, 学術講演会論文集, 18, 2, 985, 988, 05 Sep. 2006
A steel tank which is 2.0 m by 4.5 m by 3.0 m is installed under the ground in order to examine increase of heat extraction or heat injection by ground water flow in ground thermal energy systems. One experiment with a ground water velocity of 1350 m per year shows 1.5 times higher heat extraction compared to another one without ground water flow. The ground water flow doesn't show increase of temperature on the surface of the ground heat exchanger in spite of heat charge. Reduction of thermal resistance of the ground heat exchanger will lead to higher performance in such conditions., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

C-47 Field Experiment on Heat Extraction from the Ground with Ground Water Flow : Part-2 Results of the thermal response test and an investigation of mixed convection in the ground
KATSURA Takao, NAGANO Katsunori, TAKEDA Sayaka, SHIMAKURA Kazumi, NAKAMURA Yasushi, 学術講演会論文集, 18, 2, 989, 992, 05 Sep. 2006
Field experiment on the thermal response test with ground water flow was conducted with a large-scale tank, which can imitate the ground water flow through the sand filled layer. The results demonstrated gradients of the ground temperature in the thermal response test with ground water flow are influenced by the range of the elapsed time. From the comparison between temperatures of measurement and calculations which apply the moving line source theory and the finite differential method respectively, it was indicated that the free convection is generated in the sand layer since the calculated temperature variations were larger than the measured ones. Thus the authors investigated the mixed convection., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

An Investigation on Relation between Ground Water Advection and Thermal Response by the Thermal Prove Method
KATSURA Takao, NAGANO Katsunori, TAKEDA Sayaka, NAKAMURA Yasushi, Transactions of the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan, 31, 112, 51, 59, Jul. 2006, [Peer-reviewed]
This paper demonstrates a laboratory experiments in order to investigate about thermal response for heat source (line or cylindrical) in the ground with ground water advection. The apparatus features to imitate ground water in a layer of sand filled into the apparatus. A prove buried in the sand layer can generate constant heat. Temperatures of the probe and each point in the sand layer were measured under a condition that the heat generation from the probe was constant. First, the experiments were carried out for several times by changing the ground water velocity. The time to achieve steady statement of the temperature change is shorter and the temperature is lower when the ground water flow is larger. Next, the each temperature variation calculated by the moving line source theory and numerical program applying finite difference method were validated by comparing with the measured one. The result showed that the calculated value reproduced the measured one. In addition, the authors proposed a method of estimation of the ground water velocity applying moving line source theory and estimated the velocity with experimental results as an example. As the result, it was confirmed that the errors between the velocities of the estimation with the method and the actual measurement are less than 100m/year or the relative errors are less than 20%., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

A Study on a Design and Performance Prediction Tool for the Ground Source Heat Pump System: Part2-Calculation of the Ground Temperature for Multiple Ground Heat Exchangers
KATSURA TAKAO, NAGANO KATSUNORI, TAKEDA SAYAKA, 空気調和・衛生工学会論文集, 31, 111, 43, 51, Jun. 2006, [Peer-reviewed]
This paper constitutes Part 2 in the series of studies that aim at development of a design and performance prediction tool for the GSHP system. First, authors described the high-speed algorithm of calculation of the ground temperature response for heat extraction of the multiple ground heat exchangers. Next, a variation of ground temperature calculated by using this method was compared with the one calculated by using superposition of the theoretical equation. As the result, the method's preciseness was proved and the calculation time was about 1/135 compared to the method described this paper with theoretical solution. From these, it was shown that the method has performance required to use as a design tool. In final, if the ground heat exchangers often become short in such a case that foundation piles of the building are used as the ground heat exchangers, it is necessary to consider heat transfer from edge of the ground heat exchangers. Thus authors reviewed the modification coefficients in order to obtain average surface temperature of the ground heat exchangers influenced by the heat transfer. The temperature calculated with the modification coefficient was compared to one calculated without the modification coefficient., The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan, Japanese

Heat Extraction Tests with Steel Foundation Piles as Ground Heat Exchangers and Its Application
NAGANO Katsunori, KATSURA Takao, TAKEDA Sayaka, NAKAMURA Yasushi, Transactions of the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan, 31, 108, 11, 19, Mar. 2006, [Peer-reviewed]
Heat exchange characteristics of steel foundation piles used as ground heat exchangers were evaluated by heat extraction tests and the calculation methods were indicated. First, heat extraction tests were carried out in such a way that the inlet fluid temperature kept constant. As a result of these tests, the use of a double U-tube indirect heat exchanger made possible to obtain an equivalent heat extraction to direct circulating heat exchanger in the condition using a steel pile with a large diameter of 400mm since ten days passed from the start of the test. Next, the effective heat conductivity of the surrounding soil was evaluated as 1.5W/m/K in comparison calculated temperature variations returned from the ground heat exchanger with a measured one. The last, thermal resistances of each type of the heat exchanger were calculated. In addition, a calculation method of the heat transfer in the indirect heat exchange type steel pile was shown. The values calculated with the method were compared to the actual measurements. As a result, it was demonstrated that calculated temperature variations returned from the ground heat exchanger reproduced those of measured in the case where steel piles with both diameter 400mm and 165mm were used., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

地中熱利用ヒートポンプシステム 地上施設の計画と施工
長野克則, 日本地熱学会誌, 28, 1, 107, 124, 25 Jan. 2006
日本地熱学会, Japanese

Planning and Installation of Overground Facilities
NAGANO Katsunori, Journal of the Geothermal Research Society of Japan, 28, 1, 107, 124, 25 Jan. 2006
日本地熱学会, Japanese

:Planning and Installation of Overground Facilities
NAGANO Katsunori, JOURNAL OF THE GEOTHERMAL RESEARCH SOCIETY OF JAPAN, 28, 1, 107, 124, 2006
The Geothermal Research Society of Japan, Japanese

Study on a Floor Supply Air Conditioning System with Thermal Energy Storage using Granulated PCM
TAKEDA Sayaka, NAGANO Katsunori, NAKAYAMA Kazuki, SHIMAKURA Kazumi, NAKAMURA Takuji, 太陽/風力エネルギー講演論文集 = Proceedings of JSES/JWEA Joint Conference, 2005, 263, 266, 20 Oct. 2005
日本太陽エネルギー学会, Japanese

Development of Groubd Source Heat Pump Unit For Residential Use
MAGA Kohhachi, OKAMOTO Atsushi, TERASHIMA Yukari, NARITA Shigeaki, NAGANO Katsunori, 太陽/風力エネルギー講演論文集 = Proceedings of JSES/JWEA Joint Conference, 2005, 267, 270, 20 Oct. 2005
日本太陽エネルギー学会, Japanese

Installation effect prediction of the ground source heat pump system with steel foundation piles as the ground heat exchangers for large scale building in cold region
NAGANO Katsunori, KATSURA Takao, TAKEDA Sayaka, SHIMAKURA Kazumi, NAKAMURA Yasushi, NAKAMURA Shinichiro, TANAKA Yoshiaki, Proceedings of JSES/JWEA Joint Conference, 2005, 279, 282, 20 Oct. 2005
日本太陽エネルギー学会, Japanese

A heat extraction and heating test with residential steel foundation piles
NAGANO Katsunori, KATSURA Takao, TAKEDA Sayaka, SHIMAKURA Kazumi, NARITA Shigeaki, NAKAMURA Yasushi, Proceedings of JSES/JWEA Joint Conference, 2005, 283, 286, 20 Oct. 2005
日本太陽エネルギー学会, Japanese

Snow Melting Performance of Ground Snow Melting Tank
TAKEDA Sayaka, NAGANO Katsunori, HAYASHI Tatsuya, KATSURA Takao, SHIMAKURA Kazumi, NAKAMURA Yasushi, Proceedings of JSES/JWEA Joint Conference, 2005, 287, 290, 20 Oct. 2005
日本太陽エネルギー学会, Japanese

Energy Utilization-Spread of Ground Thermal Energy System
NAGANO Katsunori, 空気調和・衛生工学, 79, 9, 781, 788, 05 Sep. 2005
空気調和・衛生工学会, Japanese

A Study on a Design and Performance Prediction Tool for the Ground Source Heat Pump System : Part1-Development of a Design and Performance Prediction Tool for the GSHP System with a Single Borehole Ground Heat Exchanger
NAGANO Katsunori, KATSURA Takao, Transactions of the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan, 30, 101, 11, 20, Aug. 2005, [Peer-reviewed]
These studies aim at development a design and performance prediction tool for the ground source heat pump system. This paper constitutes Part1 in the series of these studies. Authors described the outline and features of the tool developed for the GSHP system with a borehole ground heat exchanger. In addition, performance prediction of the GSHP system for a resident house in Sapporo was performed and installation effect was estimated by the developed tool. A result of calculations shows that the GSHP system can reduce 56% of LCCO_2 compared to the oil boiler heating system., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Urban Metabolism とエネルギー
長野 克則, 太陽エネルギー = Solar energy, 31, 4, 1, 1, 31 Jul. 2005
Japanese

D-48 Potential of the Woody Biomass as a Heat Source in Hokkaido : Questionnaire Survey of Availability in the Tohoku Region
NAGANO Katsunori, HIRAGA Yuka, SHIMAKURA Kazumi, 学術講演会論文集, 17, 3, 1753, 1756, 25 Jul. 2005
This paper evaluated the potential of the woody biomass as a natural energy resource. We performed questionnaires to 396 cities, towns and villages in 6 prefectures of Tohoku region (Aomori, Iwate, Miyagi, Akita, Yamagata and Fukushima). We surveyed awareness related to availment of the woody biomass. The introduction model of the woody biomass is shown. In this model, the methanol is manufactured by the gasification and electricity is generated with the methanol and the storing warehouse of rice is kept warm and cold with the use of the rejection heat by power generation, The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

H-57 Study on a Ground Snow Melting Tank Using Rotating Press-in Steel Pile : (Parl2) Numerical Simulation about Promotional Method for Snow Melting
NAGANO Katunori, HAYASHI Tatsuya, TAKEDA Sayaka, SHIMAKURA Kazumi, 学術講演会論文集, 17, 3, 2121, 2124, 25 Jul. 2005
This study is to propose a snow-melting tank using Ground Thermal Energy (GSMT: Ground Snow Melting Tank). The GSMT using a steel pile is to use stable ground thermal energy full year without fossil fuel. The GSMT ability is examined by numerical simulation. As a result of the numerical simulation in case of using a steel pile is 25m in length, snow weighting about 6t thaws in 17.2 days. Consistency with the numerical simulation is explained by laboratory a experiment. Additionally, in case the GSMT should be implemented in Sapporo, the number of steel piles required is estimated., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

D-3 Study on Application of Thermal Heat Storage System with Microcapsule Slurry PCM : (Part3) Characteristic of Heat Transfer in Dynamic System and Application of Solar System
NAGANO Katsunori, HASHIMOTO Takashi, FUKUMURA Fumi, SHIMAKURA Kazumi, 学術講演会論文集, 17, 1, 237, 240, 25 Jul. 2005
Microcapsule slurry PCM (MCS-PCM) keeps fluid under the phase change temperature and can be used as an energy storage material and a thermal medium. We deal with two systems. One is the static system, which exchanges heat with a heat exchanger placed inside a tank filled with MCS-PCM. The other is the dynamic system, which MCS-PCM is circulated by pump and exchanges heat with a heat exchanger placed outside a tank. It is cleared that overall heat transfer rate by the experiment and numerical calculations. Also, we apply the dynamic system to the actual solar heating system. It is shown that available energy for heating through this system is about 58% of the daily solar radiation on a clear day in winter., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

D-1 Study on the Floor Supply Air Conditioning System in Building Structure Thermal Storage with Granulated Phase Change Material : Part 6 Thermal characteristics and the indoor thermal environment for heating operation in winter
TAKEDA Sayaka, NAGANO Katsunori, NAKAYAMA Kazuki, SHIMAKURA Kazumi, NAKAMURA Takuji, 学術講演会論文集, 17, 1, 229, 232, 25 Jul. 2005
We have proposed a floor supply heating system utilized thermal energy storage (TES) for granular Phase Change Material (PCM) as well as for building structure. A calculation indicates that air conditioners aren't operated during the daytime at a set temperature of 18℃ by TES using midnight power rate. The granular PCM is also effective for TES of diurnal solar heat gain. The use provides stabilized room temperature around the phase change range., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

C-17 A study on humidity control with natural porous materials from Hokkaido
NAGANO Katsunori, ADACHI Takuya, KOJIMA Sadayuki, SHIMAKURA Kazumi, 学術講演会論文集, 17, 1, 213, 216, 25 Jul. 2005
A natural porous material, which has siliceous shale from the Wakkanai formation, is applied for humidity control. Its isotherm shows the high capacity on both adsorption and desorption. The use of the siliceous shale as interior materials provides the effective performance on humidity control. Numerical simulation also shows the reduction of fungus generation risk in the rainy season. In the same condition on weight, increasing the area can lead to higher performance than that of the thickness. The application of such kind of interior materials for a dressing room in front of a bathroom, it can reduce condensed water up to 50 times than the use of nonhygroscopic materials in the rainy season., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

D-4 Study on Application of Thermal Heat Storage System with Microcapsule Slurry PCM : (Part4) Numerical Calculation of Solar Heating System
NAGANO Katsunori, FUKUMURA Fumi, HASHIMOTO Takashi, SHIMAKURA Kazumi, 学術講演会論文集, 17, 1, 241, 244, 25 Jul. 2005
We dealt with Microcapsule slung PCM (MCS-PCM) which keeps fluid under the phase change temperature. In Part3, we constructed the actual solar heating system. In this paper, we conducted a numerical calculation program tool to predict performance of this system. As a result of Calculation that assumes detached house in Sapporo City, about 134MJ of available energy for heating through the solar system with MCS-PCM tank in a winter season was increased compared with the case where a tank which has the same water volume. In addition, if we apply the lower phase change temperature PCM tank to solar system, available energy is more increased., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

H-56 Study on a Ground Snow Melting Tank Using Rotating Press-in Steel Pile : Part 1 Theoretical Analysis about Snow Melted and Field Experiment
TAKEDA Sayaka, NAGANO Katsunori, HAYASHI Tatsuya, Katsura Takao, SHIMAKURA Kazumi, 学術講演会論文集, 17, 3, 2117, 2120, 25 Jul. 2005
We propose a "zero energy" ground snow melting tank using a steel pile. A theoretical analysis predicts that the use of a steel pile of 2000 mmφ would result in the snow melting of 174 m^3 during a winter season. Field experiments are conducted with two steel piles of different diameters, 600mmφ and 800mmφ. It spends 11 days and 18 days to melt the whole snow filled in the piles respectively. The measurements also indicate the average snow melting rate per the length of 23 W/m and 34 W/m for the steel piles of 600mmφ and 800mmφ., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

H-9 Development of the design tool of the Ground Source Heat Pump System and its application : Part-4 Calculation method for the indirect heat exchange type steel pile and its application
NAGANO Katsunori, KATSURA Takao, TAKEDA Sayaka, SHIMAKURA Kazumi, NOGAWA Takafumi, TSUCHIYA Atsushi, 学術講演会論文集, 17, 1, 585, 588, 25 Jul. 2005
In this paper, a calculation method of the heat transfer in the indirect heat exchange type steel pile for the GSHP system was developed and its reproducibility was confirmed by comparing calculated values with actual measurements. First, the effective heat conductivity of the surrounding soil was evaluated by applying the calculation method of the design and performance prediction tool for the GSHP system. The result was 1.5 W/m/K in comparison calculated temperature variations returned from the ground heat exchanger with a measured one. Next, a calculation method of the heat transfer in the indirect heat exchange type steel pile was shown and values calculated with the method was compared to the actual measurement. As a result, it was demonstrated that calculated temperature variations returned from the ground heat exchanger reproduced those of measured in the case where steel piles with both diameter 400mm and 165mm were used., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

H-10 Development of the design tool of the Ground Source Heat Pump System and its application : Part-5 Installation effect prediction of the GSHP system with steel foundation piles as the ground heat exchangers for large scale buildings in cold region
NAGANO Katsunori, KATSURA Takao, TAKEDA Sayaka, SHIMAKURA Kazumi, NOGAWA Takafumi, 学術講演会論文集, 17, 1, 589, 592, 25 Jul. 2005
Two kind of large scale buildings planed installations of the GSHP system with steel foundation piles as the ground heat exchangers in cold region are predicted performance and installing effect by a design and performance prediction tool for the GSHP system. In the fast one, it was shown that the GSHP system with 70 steel foundation piles of 37m long can operate for heating and cooling demand of the building of floor area 2000m^2. Another performance prediction of the GSHP system with 51 steel foundation piles of approximately 4.7m long demonstrated the heating output of the GSHP system enough to cover the base heating demand of 50kW generated by ventilation of the building., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

H-11 Development of the design tool of the Ground Source Heat Pump System and its application : Part-6 the heat extraction test with residential steel foundation piles
NAGANO Katsunori, TSUCHIYA Atsushi, KATSURA Takao, TAKEDA Sayaka, NOGAWA Takafumi, NARITA Shigeaki, 学術講演会論文集, 17, 1, 593, 596, 25 Jul. 2005
The heat extraction test with residential steel foundation piles was carried out. As a result of the test, total heating output was 26.6GJ for 1222hours, the value satisfied the heating load of the residential house in cold region. Using a performance prediction tool, it was demonstrated that calculated ground temperature variations could reproduce ones of the actual measurement., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

H-12 Development of the design tool of the Ground Source Heat Pump System and its application : Part-7 Evaluation of design and performance prediction for snow melting system using ground thermal energy
NAGANO Katsunori, NOGAWA Takafumi, KATSURA Takao, TAKEDA Sayaka, SHIMAKURA Kazumi, TSUCHIYA Atsushi, 学術講演会論文集, 17, 1, 597, 600, 25 Jul. 2005
Utilization of ground thermal energy is proposed as one of the effective solution in energy saving for snow melting on pavement. We developed the computer simulation tool for design and performance prediction, and made compact thermal response tester. Effective thermal conductivity was estimated 1.40W/(m・K) from the result of thermal response test which was performed in Sapporo. As a result of Simulation, Calculated annual primary energy consumption of snow melting system using ground thermal energy was reduced about 34% compared to conventional system using boiler. Underground Thermal Energy Storage is not effective to reduce primary energy consumption compared to the system without UTES., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Development of an autonomous performance testing system of a water source heat pump and actual performances of Japanese small water heat source heat pump units　　　　　　　　　　　　　　　
K. Nagano, T. Nogawa, T. Katsura, K. Shimakura, A. Okamoto, Proceedings of 8th International Energy Agency Heat Pump Conference, 4-11, 1-8, 2005

Thermal characteristics of steel foundation piles as ground heat exchangers
K. Nagano, T. Katsura, S. Takeda, E. Saeki, Y. Nakamura, A. Okamoto, S. Narita, Proceedings of 8th International Energy Agency Heat Pump Conference, 6-12, 1-9, 2005

Development of a design and performance prediction tool for ground source heat pump system
K. Nagano, T. Katsura, T. Nogawa, A. Okamoto, Y. Nakamura, Proceedings of 8th International Energy Agency Heat Pump Conference, 26, 4-4, 1-12, 2005

札幌における自然放射性物質の挙動特性と影響評価に関する研究
伊藤 智徳, 横山 真太郎, 旗谷 広司, 長野 克則, 倉前 正志, 嶋倉 一實, 卓 維海, 衛生工学シンポジウム論文集, 12, 185, 188, 31 Oct. 2004
北海道大学衛生工学会, Japanese

G-34 A Study on Active Humidity Control with Siliceous Shale from the Wakkanai Formation Outdoor and indoor experiment on active humidity control
NAGANO Katsunori, KOJIMA Sadayuki, TAKEDA Sayaka, SHIMAKURA Kazumi, YOKOYAMA Shintaro, 学術講演会論文集, 16, 2, 1323, 1326, 20 Aug. 2004
Introduced in a previous paper, Siliceous Shale from the Wakkanai Formation has high humidity control performance. Under low airflow rate, Siliceous Shale layer contacts to air in one side can be used in passive humidity control system. But there is necessity of large area to control humidity of supply air. In this report, Siliceous Shale packed bed is evaluated on controlling monthly and daily humidity variation. Humidity-controlling performance is estimated in relation to controlling air volume and amount of Siliceous Shale. Also, these experimental results applied to confirm important coefficients for a numerical analysis., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

H-45 Investigation of Behavior Pattern and Risk Assessment of Natural Radioactive Substances in Urban Space
ITO Tomonori, YOKOYAMA Shintaro, HATAYA Koji, NAGANO Katsunori, KURAMAE Masashi, SIMAKURA Kazumi, 学術講演会論文集, 16, 3, 1923, 1926, 20 Aug. 2004
Radon daughters generated from the earth has the high risk which lung cancer induces, and is considered to be one of the serious indoor contaminants in Europe and America. National Institute of Radiological Sciences started the simultaneous measurement project of the amount of generating to it for 20 cities in East Asia where data are not ready enough until now. In this report, the amount of generating of radon in Sapporo was identified. And the amount of required ventilation in urban space was presumed using the identified amount of generating. Moreover, risk assessment of natural radioactive substances was investigated., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

D-64 Research of Heating Operation of Nursery with Woody Pellet Boiler
NAGANO Katunori, HAYASHI Tatsuya, HIRAGA Yuka, SHIMAKURA Kazumi, YOKOYAMA Shintaro, 学術講演会論文集, 16, 3, 1719, 1722, 20 Aug. 2004
Iwate Prefecture has been promoted the introduction of new energy of small environmental load to suppress global warming and to form a recycling society.Woody biomass that can achieve sustainable development of society and contribute to regional development has gotten a lot of attention recently.Unlike a fossil fuel, woody biomass is sustainable resources and carbon-neutral.In this paper, we researched heating operation of nursery with woody pellet boiler. And we measured the amount used of woody pellet and heating load and thermal environment of nursery., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

D-63 Potential of the Woody Biomass as a Heat Source in Hokkaido
NAGANO Katsunori, HIRAGA Yuka, HAYASHI Tatsuya, SHIMAKURA Kazumi, YOKOYAMA Shintaro, 学術講演会論文集, 16, 3, 1715, 1718, 20 Aug. 2004
This paper evaluated the potential of the woody biomass in Hokkaido as a natural energy resource. It is described the required conditions in order to promote energy conversion to the woody biomass fuel with illustrations in Europe where the woody biomass fuel has spread widely. We performed questionnaires to 212 cities, towns and villages and the sawmills in Hokkaido, and surveyed awareness related to availment of the woody biomass and estimated amount that could be processed to the woody pellets., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

H-22 Simulation of Flight Crew Using Prediction Computer Program of Whole Body Temperature
BABA Hiroyasu, YOKOYAMA Shintaro, YAMAMOTO Noriaki, NAGANO Katsunori, KURAMAE Masashi, SHIMAKURA Kazumi, 学術講演会論文集, 16, 1, 649, 652, 20 Aug. 2004
We have been developing a prediction computer program of whole body temperature to evaluate and control thermal environment. This paper, for the extension of our program applied to the cases under manned space flight and jet flight, describes about improvement of our program to the simulation of body temperature of aircraft performed before in consideration of metabolic heat generated by human activity change at the time of fling an aircraft accompanied straining maneuver and blood flow change by mental strain. We also report psychological evaluation of the flight crew using our predictive formulae of thermal sensation and comfort., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

C-39 Study on Application of Thermal Heat Storage System with Microcapsule Slurry PCM : (Part 1) Fundamental Physicality and Heat Exchanger Test
NAGANO Katsunori, HASHIMOTO Takashi, FUKUMURA Fumi, SHIMAKURA Kazumi, YOKOYAMA Shintaro, 学術講演会論文集, 16, 2, 963, 966, 20 Aug. 2004
In this paper heat exchange tests are performed using the Microcapsule Slurry PCM (MCS-PCM) with four kinds of heat exchangers. MCS-PCM keep slurry, even it is freezing. Total amount of exchanged heat for 5 hours is 1.3 times larger than that of water and can be utilized at the most. The heat recovery rate is increased in order of the heat exchange area. The highest performance is indicated in the condition with rectangle fins because of the effect of natural convection, whereas round shape fins have the advantage in a condition with a solid PCM., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

C-40 Study on Application of Thermal Heat Storage System with Microcapsule Slurry PCM : (Part2) Charging and Discharging Test of an Actual Storage Tank and System Simulation
NAGANO Katsunori, FUKUMURA Fumi, HASHIMOTO Takashi, SHIMAKURA Kazumi, YOKOYAMA Shintaro, 学術講演会論文集, 16, 2, 967, 970, 20 Aug. 2004
This paper deals with thermal characteristics of Microcapsule Slurry PCM (MCS-PCM) during charging and discharging heat. The result of experiments using an actual storage tank showed that 15% larger heat can be recovered compared the PCM storage to the water storage at the hot water flow rate of 7 L/min. According to the experimental results, we conducted a numerical calculate on solar hot water supply system. 560MJ of auxiliary heating in a year can be cut down compared with the case where a tank which has the same water volume., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

C-37 Study on the Floor Supply Air Conditioning System in Building Structure Thermal Storage with Granulated Phase Change Materials : (Part 5) Evaluation of thermal environment through measurement and calculation
TAKEDA Sayaka, NAGANO Katsunori, SHIMAKURA Kazumi, MOCHIDA Tohru, NAKAMURA Takuji, SUZUKI Michiya, 学術講演会論文集, 16, 2, 955, 958, 20 Aug. 2004
Measurements which simulate an air conditioning system in office buildings indicate that the air conditioner load in the daytime is reduced to 0.37 MJ/m^2 and the load shifting effect is improved to 85% in a condition with PCM. The condition also provides thermal comfort continuously after 10:00. The effect of radiation from the floor face allows the set temperature to be increased to 28℃. The use of PCM also effects the improvement of the uncomfortable coldness and the PMV indicates the neutral sensation even in the morning., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

D-52 Development of Design the Ground Source Heat Pump System and its Application : Part2 Calculation the Borehole Thermal Resistance and Consideration of the System Performance Borehole Thermal Resistance Influences
NAGANO Katsunori, KATSURA Takao, NOGAWA Takafumi, 学術講演会論文集, 16, 3, 1671, 1674, 20 Aug. 2004
Authors calculated the borehole thermal resistance by boundary element method. Calculated the borehole thermal resistance is 0.127m^2K/W for a single U-tube heat exchanger and 0.086m^2K/W for a double U-tube heat exchanger when λ_g=1.8W/m/K, d_<Utube>=32mm, d_<bo>=120mm, d_<iUtube>=52mm as calculation conditions were given. When it makes the distance between supply pipe and return pipe of single U-tube wider, thermal resistance becomes lower. It is better to keep turbulent flow for making the amount of heat transfer by convection much., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

D-53 Development of the design tool of the Ground Source Heat Pump System and its application : Part3 Expansion to Multiple Ground Heat Exchangers
NAGANO Katsunori, KATSURA Takao, NOGAWA Takafumi, 学術講演会論文集, 16, 3, 1675, 1678, 20 Aug. 2004
Authors show calculation technique of multiple ground heat exchangers by superposition principle in space and ground temperature to the distance from a ground heat exchanger. The calculation technique using the equivalent radius which shows a response equal to average temperature was used by multiplying the radius by the coefficient of correction to the influence of heat transfer from the edges of a ground heat exchanger and ground surface. As a result of calculation of operation the GSHP system using 20 lengths of ground heat exchangers by the design tool using this calculation technique, the average COP obtained is 5.7 for heating period and 5.6 for cooling period in Tokyo., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

41172 Study on the Floor Supply Air Conditioning System Applied Micro Capsule Phase Change Material : Part2 Construction of an experimental system and evaluation of the thermal environment
TAKEDA Sayaka, NAGANO Katsunori, NAKAMURA Takuji, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-2, Environmental engineering II, Heat, moisture, thermal comfort, natural energy, air flow, ventilation, smoke exhaustion, computational fluid dynamics, indoor air quality heating, cooling and air-conditioning heat and cold sources, piping systems application of building services, 2004, 371, 372, 31 Jul. 2004
Architectural Institute of Japan, Japanese

41313 Results of questionnaire survey in Hokkaido related to use of the woody biomass as a energy resource and the potential of waste wood from lumber mills as a heat source for heating of houses
NAGANO Katsunori, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-2, Environmental engineering II, Heat, moisture, thermal comfort, natural energy, air flow, ventilation, smoke exhaustion, computational fluid dynamics, indoor air quality heating, cooling and air-conditioning heat and cold sources, piping systems application of building services, 2004, 653, 654, 31 Jul. 2004
Architectural Institute of Japan, Japanese

高速航空機搭乗員の生体内温度と心理反応のシミュレーション
馬場裕康, 山本憲昭, 尾崎博和, 嶋倉一実, 倉前正志, 長野克則, 横山真太郎, 日本生理人類学会誌, 9, 120, 121, 15 Jun. 2004
Japanese

ラドンとラドン短寿命娘核種の生体影響に関する研究 第1報 札幌における発生量と呼吸器官への簡易沈着モデルの検討
伊藤智徳, 青木徹, はた谷広司, 横山真太郎, 嶋倉一実, 倉前正志, 長野克則, 日本生理人類学会誌, 9, 3, 116, 117, 15 Jun. 2004
日本生理人類学会, Japanese

国際会議
長野 克則, 濱田 靖弘, 空気調和・衛生工学, 77, 12, 1153, 1158, 05 Dec. 2003
Japanese

国際会議〔The Seventh International Symposium on Ventilation for Contaminant Control, Ventilation 2003/第7回国際産業換気シンポジウムVentilation 2003〕 (〔空気調和・衛生工学会 平成15年〕年報特集号)
長野 克則, 濱田 靖弘, 空気調和・衛生工学, 77, 12, 1153, 1158, Dec. 2003
空気調和・衛生工学会, Japanese

A Study on Evaluation Method of Thermal Sensation in Outdoor Environment : - Proposal of Required Thermal Regulation.
KUWABARA Kouhei, HORIKOSHI Tetsumi, MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi, 学術講演会論文集, 15, 1, 105, 108, 20 Aug. 2003
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

A Study on Floor Supply Air Conditioning System in Building Structure Thermal Storage withGranulated Phase Change Materials : (Part2) Heat Exchange Characteristics between Microcapsule PCM and Air
NAGANO Katsunori, TAKEDA Sayaka, KOJIMA Sadayuki, MOCHIDA Tohru, SHIMAKURA Kazumi, NAKAMURA Takuji, 学術講演会論文集, 15, 2, 917, 920, 20 Aug. 2003
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

A Study on Ground Source Heat Pump System for Residential/Commercial Buildings
SAITOH Hisashi, HAMADA Yasuhiro, NAKAMURA Makoto, KUBOTA Hideki, ISHIWATARI Yuichiro, NAGANO Katsunori, YOKOYAMA Shintaro, OCHIFUJI Kiyoshi, 学術講演会論文集, 15, 2, 1033, 1036, 20 Aug. 2003
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

A Study on Floor Supply Air Conditioning System in Building Structure Thermal Storage with Granulated Phase Change Materials : (Part4) Outline of a real scale experimental facility and evaluation of peak shaving effects
NAGANO Katsunori, TAKEDA Sayaka, HAYASHI Kengo, MOTHIDA Torn, SHIMAKURA Kazumi, NAKAMURA Takuji, 学術講演会論文集, 15, 2, 925, 928, 20 Aug. 2003
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

A Study on Floor Supply Air Conditioning System in Building Structure Thermal Storage with Granulated Phase Change Materials : (Part3) Thermal characteristics from experiments simulated air conditioning system in office buildings
NAGANO Katsunori, TAKEDA Sayaka, HAYASHI Tatsuya, MOTHIDA Torn, SHIMAKURA Kazumi, NAKAMURA Takuji, 学術講演会論文集, 15, 2, 921, 924, 20 Aug. 2003
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Design tool of ground source heat pump system and its application
NAGANO Katsunori, KATSURA Takao, NOGAWA Takashi, MOCHIDA Tohru, 学術講演会論文集, 15, 2, 1037, 1040, 20 Aug. 2003
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Development of Performance measuring system of ground source heat pump and a heat pump performance
NAGANO Katsunori, NOGAWA Takafumi, SHIMAKURA Kazumi, KATSURA Takao, 学術講演会論文集, 15, 1, 541, 544, 20 Aug. 2003
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

41571 A Study on Floor Supply Air Conditioning System Applied Micro Capsule Phase Change Material
NAGANO Katsunori, TAKEDA Sayaka, NAKAMURA Takuji, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-2, Environmental engineering II, Heat, moisture, thermal comfort, natural energy, air flow, ventilation, smoke exhaustion, computational fluid dynamics, indoor air quality heating, cooling and air-conditioning heat and cold sources, piping systems application of building services, 2003, 1179, 1182, 30 Jul. 2003
Architectural Institute of Japan, Japanese

Thermal Characteristics of Direct Heat Exchange between Granulated Phase Change Materials and Air　　　　　　　　　　　　　　　
K. Nagano, S. Takeda, T. Mochida, K. Shimakura, Proceedings of the 4th International Conference on Cold Climate Heating, Ventilating and Air- Conditioning,PN66 Trondheim, Norway, 1, 10, 2003

Stabilization of Supply Air Temperature by Using Granulated Phase Change Materials and its Application to Ventilation System of a House during Summer
K. Nagano, S. Takeda, T. Mochida, K. Shimakura, Proceedings of the 4th International Conference on Cold Climate Heating, Ventilating and Air- Conditioning, PN67 Trondheim, Norway, 67, 562, 1, 10, 2003
Authors have proposed a direct heat exchange system between granulated phase change materials (PCM) and air. In this paper, experiments are conducted with packed bed of granulated PCM when inlet temperature is changed periodically such as outdoor air temperature. Stabilization effects of supply air temperature are demonstrated by experiments and calculations. Results from a computer simulation program, which was shown in previous paper, can reproduce the variation of actual outlet temperature, which is always in phase change condition. Also, reduction of cooling load for ventilation is examined among 8 cities through the computer simulation. Suitable heat storage capacity is shown., Architectural Institute of Japan, Japanese

An Experimental Study on Floor Supply Air Conditioning System Using Granulated Phase Change Materials to Augment Building Structure Thermal Storage　　　　　　　　　　　　　　　
K. Nagano, S. Takeda, T. Mochida, K. Shimakura, T. Nakamura, Proceedings of the 4th International Conference on Cold Climate Heating, Ventilating and Air- Conditioning,PN68 Trondheim, Norway, 1, 10, 2003

Evaluation of Thermal Characteristics in Building Structure Thermal Storage Utilized Granulated Phase Change Materials　　　　　　　　　　　　　　　
S. Takeda, K. Nagano, T. Mochida, K. Shimakura, T. Nakamura, Proceedings of the 4th International Conference on Cold Climate Heating, Ventilating and Air- Conditioning,PN69 Trondheim, Norway, 1, 10, 2003

Thermal Characteristics of Phase Change Materials for Effective Utilization of Urban Waste Heat of Fuel Cell　　　　　　　　　　　　　　　
K. Nagano, K. Ogawa, T. Mochida, K. Shimakura, K. Hayashi, H. Ogoshi, Proceedings of the 4th International Conference on Cold Climate Heating, Ventilating and Air- Conditioning,PN70 Trondheim, Norway, 1, 10, 2003

Evaluation of Energy Conservation for Cooling through Natural Ventilation in Japan　　　　　　　　　　　　　　　
K. Nagano, K. Hayashi, T. Mochida, Proceedings of the 4th International Conference on Cold Climate Heating, Ventilating and Air- Conditioning,PN71 Trondheim, Norway, 1, 10, 2003

Development of a PCM Filter and its Application to a Constant Temperature Air Supply System　　　　　　　　　　　　　　　
K. Nagano, T. Kastura, K. Shimakura, S. Takeda, T. Mochida, N. Yamaguchi, Proceedings of the 4th International Conference on Cold Climate Heating, Ventilating and Air- Conditioning,PN72 Trondheim, Norway, 1, 10, 2003

Effect of solar radiation on man’s thermal sensation in　　　　　　　　　　　　　　　
K. Kuwabara, T. Mochida, T. Horikoshi, K. Nagano, K. Shimakura, Proceedings of the 4th International Conference on Cold Climate Heating, Ventilating and Air- Conditioning,PN20 Trondheim, Norway, 1, 10, 2003

High efficient solar hot water supply system using evacuated solar collectors with a PCM/water hybrid thermal energy storage　　　　　　　　　　　　　　　
K. Nagano, K. Ogawa, T. Hashimoto, K. Shimakura, T. Mochida, A. Okamoto, K. Hayashi, Proceedings of 9th International Conference on Thermal Energy Storage, FUTURESTOCK, Warsaw, Poland,, 167, 172, 2003

Performance of a PCM filter and evaluation of potentials for some applications　　　　　　　　　　　　　　　
K. Nagano, T. Katsura, K. Shimakura, T. Mochida, Proceedings of 9th International Conference on Thermal Energy Storage, FUTURESTOCK, Warsaw, Poland,, 573, 578, 2003

Thermal characteristics of Magnesium nitrate hexahydrate and magnesium chloride hexahydrate mixture as a phase change material for effective utilization of urban waste heat　　　　　　　　　　　　　　　
K. Nagano, K. Ogawa, T. Mochida, K. Shimakura, K. Hayashi, H. Ogoshi, Proceedings of 9th International Conference on Thermal Energy Storage, FUTURESTOCK, Warsaw, Poland,, 579, 584, 2003

Performance of heat charge/discharge of Magnesium nitrate hexahydrate and magnesium chloride hexahydrate mixture to a single vertical tube for a latent heat storage system　　　　　　　　　　　　　　　
K. Nagano, K. Ogawa, T. Mochida, K. Shimakura, K. Hayashi, H. Ogoshi, Proceedings of 9th International Conference on Thermal Energy Storage, FUTURESTOCK, Warsaw, Poland,, 585, 590, 2003

Design of a local library utilized natural ventilation system and ground coupled energy system by using steel foundation piles　　　　　　　　　　　　　　　
K. Nagano, K. Hayashi, T. Katsura, T. Hayashi, Proceedings of 9th International Conference on Thermal Energy Storage, FUTURESTOCK, Warsaw, Poland,, 15, 20, 2003

Development of Floor Supply Air Conditioning System with Granulated Phase Change Materials　　　　　　　　　　　　　　　
S. Takeda, K. Nagano, T. Mochida, T. Nakamura, Proceedings of 9th International Conference on Thermal Energy Storage, FUTURESTOCK, Warsaw, Poland,, 317, 322, 2003

Thermal Characteristics in Direct Heat Exchange between Granulated Phase Change Materials and Air　　　　　　　　　　　　　　　
S. Takeda, K. Nagano, T. Mochida, K. Shimakura, Proceedings of 9th International Conference on Thermal Energy Storage, FUTURESTOCK, Warsaw, Poland,, 657, 662, 2003

Application of Granulated Phase Change Materials to Floor Supply Air Conditioning System in Office Buildings　　　　　　　　　　　　　　　
S. Takeda, K. Nagano, T. Nakamura, Proceedings of Ventilation Sapporo, Japan, 2003, 157, 162, 2003

Potential of natural cooling in Japan　　　　　　　　　　　　　　　
K. Nagano, K. Hayashi, T. Mochida, Proceedings of Ventilation Sapporo, Japan, 2003, 179, 184, 2003

Development of a high performance solar hot water supply system suing evacuated solar tubes and latent thermal energy storage　　　　　　　　　　　　　　　
K. Nagano, K. Ogawa, T. Hashimoto, K. Shimakura, T. Mochida, A. Okamoto, K. Maga, K. Hayashi, H. Ogoshi, Proceedings of ISES Solar World Congress 2003 Gothenburg, Sweden, 2003, P5-26, P1-6, 2003

Evaluation of Reduction of Cooling Load for Ventilation by Thermal Energy Storage Utilized Granulated Phase Change Materials　　　　　　　　　　　　　　　
S. Takeda, K. Nagano, T. Mochida, K. Shimakura, Proceedings of ISES Solar World Congress 2003 Gothenburg, Sweden, 2003, P6-58, P1-6, 2003

O-29 A Study on Evaluation of Asymmetrical Thermal Environment : A Proposal of Operative Temperature on Each Segment(Session)
MOCHIDA Tohru, HAYASE Hideo, KUWABARA Kouhei, NAGANO Katsunori, SHIMAKURA Kazumi, Proceedings of the ... Symposium on Human-Environment System, 26, 231, 234, 05 Dec. 2002
人間-生活環境系学会, Japanese

P-15 An Experimental Study on Evaluation of Outdoor Thermal Environment(Poster Session)
KUWABARA Kouhei, MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi, NIWA Toshio, Proceedings of the ... Symposium on Human-Environment System, 26, 125, 128, 05 Dec. 2002
人間-生活環境系学会, Japanese

屋外温熱環境の評価法に関する実験的検討
桑原浩平, 持田徹, 長野克則, 嶋倉一実, 丹羽俊夫, 人間-生活環境系シンポジウム報告集, 26th, 125, 128, 05 Dec. 2002
Japanese Society of Human-Environment System, Japanese

潜熱蓄熱と躯体蓄熱の併用による床吹出し空調に関する研究
武田 清香, 長野 克則, 持田 徹, 嶋倉 一實, 衛生工学シンポジウム論文集, 10, 85, 88, 31 Oct. 2002
北海道大学衛生工学会, Japanese

日本全国における外気冷房導入による冷房負荷削減効果の検討
長野 克則, 持田 徹, 林 謙吾, 衛生工学シンポジウム論文集, 10, 89, 92, 31 Oct. 2002
北海道大学衛生工学会, Japanese

An experimental study of thermal characteristics of phase change materials for effective utilization of urban waste heat of a fuel cell
NAGANO Katsunori, OGAWA Kenji, MOCHIDA Tohru, SHIMAKURA Kazumi, HAYASHI Kanetoshi, OGOSHI Hidemasa, Transactions of the Society of Heating,Air-Conditioning and Sanitary Engineers of Japan., 27, 87, 51, 60, Oct. 2002, [Peer-reviewed]
The authors investigated latent heat storage by materials with phase change temperature of 60℃〜90℃ in order to utilize waste heat from modern urban energy supply systems. Here, they focused on a mixture of magnesium nitrate hexahydrate as a base material and magnesium chloride hexahydrate as an additive to modulate the melting point. Addition of 5〜10wt% of the latter resulted in a modulated melting point of about 80℃ and a heat of fusion of about 150kJ/kg. Increasing the mix ratio had little effect on heat of fusion, but allowed the melting point to be modulated to about 60℃. Repeated melting and solidification tests showed that the heat of fusion and melting point retained their original values even after 500 iterations. Heat charging and discharging experiments were done using a heat storage cistern with a vertical heat exchange unit. These showed that effective use of the phase change temperature region resulted in an available enthalpy of 2.0〜2.5 times that of water heat storage., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

An Experimental Study on Temperature Stabilizing Effect of PCM Filter
KATSURA Takao, 学術講演会論文集, 14, 1, 325, 328, 08 Aug. 2002
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Development of hybrid wallboards incorporating PV cells and evaluation of utilization of collected heat
NAGANO Katsunori, Mochida Tohru, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-2, Environmental engineering II, Heat, moisture, thermal comfort, natural energy, air flow, ventilation, smoke exhaustion, computational fluid dynamics, indoor air quality heating, cooling and air-conditioning heat and cold sources, piping systems application of building services, 2002, 1151, 1154, 30 Jun. 2002
Architectural Institute of Japan, Japanese

Experimental Study on Application of Granulated Phase Change Materials into Floor Supply Air Conditioning System with Building Structure Thermal Storage
TAKEDA Sayaka, NAGANO Katsunori, MOCHIDA Tohru, NAKAMURA Takuji, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-2, Environmental engineering II, Heat, moisture, thermal comfort, natural energy, air flow, ventilation, smoke exhaustion, computational fluid dynamics, indoor air quality heating, cooling and air-conditioning heat and cold sources, piping systems application of building services, 2002, 1077, 1078, 30 Jun. 2002
Architectural Institute of Japan, Japanese

Development of thermal-PV hybrid system by using new type wallboards incorporating PV cells　　　　　　　　　　　　　　　
K. Nagano, T. Mochida, K. Shimakura, S Takeda, Proceedings of the Euro Sun 2002, Bologna, Italy, 2002, P1.25, 1-6, 2002

Development and system building of urban environmental module to withstand disasters in cold region of heavy snows. Study on quake resistance and indoor environment of wooden buildings using CAD.
TANIGUCHI HIROSHI, NOGUCHI TOORU, TEZUKA JUN'ICHI, UKAI TAKAYOSHI, ARAI NORIO, KUDO KAZUHIKO, NAGANO KATSUNORI, 積雪寒冷地域における災害に強い都市環境モジュールの開発とシステム構築 平成13年度 研究成果報告書 北海学園大学学術フロンティア推進事業, 59, 68, 2002
Japanese

Study on Hybrid Utilization of Renewable Energy for Low Energy House. Part 4. Evaluation on Energy Conservation, Environmental Protection and Economical Aspect.
HAMADA YASUHIRO, NAKAMURA MAKOTO, OCHIFUJI KIYOSHI, HAJI NORIKO, SHIGIHARA MAKOTO, YOKOYAMA SHINTARO, NAGANO KATSUNORI, 空気調和・衛生工学会論文集, 27, 84, 77, 86, Jan. 2002, [Peer-reviewed]
This paper constitutes Part 4 in the series of studies on hybrid utilization of renewable energy for a low energy house in which a ground source heat pump system is applied for heating and cooling as a main strategy. Firstly, energy, CO_2 and economical payback periods of natural energy utilization systems adopted for an experimental house were calculated. It was shown that their periods on energy and CO_2 emissions were both within 8 years. Secondly, it was clarified that the life cycle energy and the life cycle CO_2 reduction rate to a conventional house in Hokkaido reached over 50% by using operating results at the experimental house. As a result of numerical analyses on thermal insulation performance and equipment composition of a low energy house, the maximum values of the life cycle CO_2 reduction rate in Sapporo and Tokyo were 69% and 63%, respectively., The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan, Japanese

Geothermal Heat Pump System.
NAGANO KATSUNORI, 冷凍, 76, 890, 1029, 1034, 15 Dec. 2001
Japanese

Geothermal Heat Pump System
NAGANO Katsunori, 冷凍, 76, 890, 1029, 1034, 15 Dec. 2001
日本冷凍空調学会, Japanese

8-1 Thermo-physiological Consideration on ISO-7933(Session 8)
SAKOI Tomonori, MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi, Proceedings of the ... Symposium on Human-Environment System, 25, 199, 202, 07 Dec. 2001
人間-生活環境系学会, Japanese

7-4 Configuration Factor on Human Body under Sedentary- and Standing-Postures(Session 7)
SAKOI Tomonori, MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi, HAYASE Hideo, MORI Takemasa, Proceedings of the ... Symposium on Human-Environment System, 25, 161, 164, 07 Dec. 2001
人間-生活環境系学会, Japanese

ISO‐7933の生体工学的検討
佐古井智紀, 持田徹, 長野克則, 嶋倉一実, 人間-生活環境系シンポジウム報告集, 25th, 199, 202, 07 Dec. 2001
Japanese Society of Human-Environment System, Japanese

椅座および立位姿勢の人体に関する形態係数
佐古井智紀, 持田徹, 長野克則, 嶋倉一実, 早瀬英男, 森健将, 人間-生活環境系シンポジウム報告集, 25th, 161, 164, 07 Dec. 2001
Japanese Society of Human-Environment System, Japanese

空気直接接触型潜熱蓄熱材の熱交換特性
武田 清香, 長野 克則, 持田 徹, 嶋倉 一實, 衛生工学シンポジウム論文集, 9, 38, 43, 01 Nov. 2001
北海道大学衛生工学会, Japanese

運動時における標準新有効温度の検討
早瀬 英男, 佐古井 智紀, 持田 徹, 長野 克則, 嶋倉 一實, 衛生工学シンポジウム論文集, 9, 44, 47, 01 Nov. 2001
北海道大学衛生工学会, Japanese

雪冷熱利用による冷房方式に関する検討
半澤 久, 持田 徹, 長野 克則, 西原 潔, 中村 聡, 関口 正博, 衛生工学シンポジウム論文集, 9, 33, 37, 01 Nov. 2001
北海道大学衛生工学会, Japanese

屋外熱環境の人体生理心理反応に関する研究
桑原 浩平, 長野 克則, 持田 徹, 嶋倉 一實, 衛生工学シンポジウム論文集, 9, 58, 63, 01 Nov. 2001
北海道大学衛生工学会, Japanese

椅座時の温冷感予測に関する一提案
佐古井 智紀, 持田 徹, 長野 克則, 嶋倉 一實, 早瀬 英男, 衛生工学シンポジウム論文集, 9, 48, 53, 01 Nov. 2001
北海道大学衛生工学会, Japanese

Experiments and Analyses on a Hybrid Solar Collector
HAMADA Yasuhiro, NAKAMURA Makoto, OCHIFUJI Kiyoshi, NARITA Ryoko, NAGAKURA Kaori, SAITOH Hisashi, YOKOYAMA Shintaro, NAGANO Katsunori, Transactions of the Society of Heating,Air-Conditioning and Sanitary Engineers of Japan., 26, 83, 21, 30, Oct. 2001, [Peer-reviewed]
This paper describes the effectiveness of a hybrid solar collector which generates both electric power and heat. Experiments and analyses on characteristics of power and heat generation through the hybrid solar collector were carried out. Firstly, experiments under the condition of constant supply temperature of brine were made and it was found that collector efficiency on electric power was from 10 to 13%, and that its efficiency on heat at 20℃-brine temperature and 40℃ was from 40 to 50% and approximately 20%, respectively. Secondly, the efficiency of the hybrid solar collector was compared with a photovoltaic and a solar collector and it was clarified that the hybrid collector had an advantage from the viewpoint of the exergy efficiency, though there are some lowering on heat collection efficiency. As a result of evaluation on annual energy balance of hybrid solar collectors installed for a low energy house in Hokkaido University, it was proven that the feasibility of the hybrid solar collectors was high., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

下水熱利用ロードヒーティングシステム構築のための要素技術開発
富田和彦, 岡喜秋, 北口敏弘, 保科秀夫, 白土博康, 長野克則, 本田公宏, 久保茂昌, 長田茂樹, 北海道立工業試験場報告, 300, 145, 154, 31 Aug. 2001
Japanese

41265 Development and experiment of hybrid PV module united with wallboard
NAGANO Katsunori, Mochida Tohru, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-2, Environmental engineering II, Heat, moisture, thermal comfort, natural energy, air flow, ventilation, smoke exhaustion, computational fluid dynamics, indoor air quality heating, cooling and air-conditioning heat and cold sources, piping systems application of building services, 2001, 529, 530, 31 Jul. 2001
Architectural Institute of Japan, Japanese

Fundamental Study on Evaluation Method for Thermal Radiation in Outdoor Environment
KONDO Motoo, MOCHIDA Tohru, KUWABARA Kouhei, NAGANO Katsunori, Transactions of the Society of Heating,Air-Conditioning and Sanitary Engineers of Japan., 26, 81, 1, 9, Apr. 2001, [Peer-reviewed]
It comes to be more important to evaluate the effect of thermal load in outdoor thermal environment or urban climate on man's thermal sensations. In urban environment, especially, the effect of solar radiation (short-wave radiation) involving interchange between surfaces is larger than in indoor environment. The authors try to define a mean radiant temperature including the effect of long and short-wave radiation involving interchange between surfaces. The temperature is defined by radiosity and incidence factor to evaluate the effect of interchange between surfaces. The incidence factor is defined almost same absorption factor, and by the incidence factor, it is easier to calculate the effect of radiation interchange outdoor environment. And the authors study the characteristic of the effective radiant temperature on two typical outdoor models, and considers that it is important in urban environment to include the effect of the long and short-wave radiation interchange between surfaces., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Experimental study on thermal environmental design of the ceiling radiative cooling system for humans lying on their back
Nagano Katsunori, Mochida Tohru, Shimakura Kazumi, Yoshino Hiroshi, Transactions of the Society of Heating,Air-Conditioning and Sanitary Engineers of Japan., 26, 81, 59, 69, Apr. 2001, [Peer-reviewed]
This study aims to clarify the control conditions of the ceiling radiative cooling system for humans lying on their back. The results will be useful for the designing of a hospital room or a bedroom. Five young subjects were adopted in these experiments. Totally, 28 experiments were carried out under the various conditions. The feature of the experiment was that subjects put on the patient's clothes, which are used in the general hospitals. When numerical values of SET^* and PMV were calculated, mean radiative temperatures evaluated from the radiative heat transfer between each face of walls, a floor and a ceiling, and each surface of a rectangle human body model were applied. As a result, it was clarified that SET^* and PMV that gave the comfortable thermal condition was around 27.0℃ and around 0.25, respectively in these experimental conditions. On the other hand, a decrease in the skin temperature at exposed parts such as the instep influenced thermal sensation. However, there was no relationship between radiative sensation votes and votes of thermal discomfort., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

太陽光発電モジュールの滑雪特性
長野克則, 空気調和 衛生工学会北海道支部第35回学術講演会論文集, 2001, 3月, 71, 74, 2001

Performance of Hybrid Wallboards United with PV Cells　　　　　　　　　　　　　　　
K. Nagano, T. Mochida, K. Shimakura, K. Murashita, Proceedings of ISES 2001 Solar World Congress, Adelaide, Australia, 2001, 24, 28, 2001

An investigation of the phase change process with natural convection in the new PCMs encapsulated in a rectangular cavity　　　　　　　　　　　　　　　
R. Domański, K. Nagano, M. Rebow, T. Mochida, Proceedings of 5th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics, Thessaloniki, Greece, 2001, 24, 28, 2001

住宅の外壁に太陽電池パネル
長野 克則, 北方圏, 115, 16, 19, 2001
北方圏センター, Japanese

Study on Hybrid Utilization of Renewable Energy for Low Energy House. Part 3-Numerical Analyses on Annual Energy Balance and Evaluation of Ground Source Heat Pump.
HAMADA YASUHIRO, NAKAMURA MAKOTO, OCHIFUJI KIYOSHI, NAGANO KATSUNORI, YOKOYAMA SHINTARO, 空気調和・衛生工学会論文集, 26, 80, 77, 86, Jan. 2001, [Peer-reviewed]
This paper constitutes Part 3 in the series of studies on hybrid utilization of renewable energy for a low energy house in which a ground source heat pump system is applied for heating and cooling as a main strategy. First of all, evaluation program of the low energy house was developed, and the program was verified to give good predictions on the performance of natural energy utilization systems by comparing with experimental results. Secondly, numerical analyses on capacity and efficiency of the ground source heat pump system (GSHP) were carried out and it was found that the amount of annual primary energy was reduced from 20% to 50% compared to that of typical heating. As a result of evaluation on annual energy balance of the low energy house, it was clarified that the self-sufficiency of energy was possible to realize in main domestic regions by applying GSHP system., The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan, Japanese

Characteristic Change of Skin Wettedness and Equal Thermal Sensation Lines
SAKOI Tomonori, MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi, Proceedings of the ... Symposium on Human-Environment System, 24, 81, 84, 05 Nov. 2000
Japanese Society of Human-Environment System, Japanese

Evaluation of an outdoor environment using mean radiant temperature including mutual radiation
KUWABARA Kouhei, MOCHIDA Tohru, KONDO Motoo, NAGANC Katsunori, SHIMAKURA Kazumi, Proceedings of the ... Symposium on Human-Environment System, 24, 73, 76, 05 Nov. 2000
Japanese Society of Human-Environment System, Japanese

Loci of Equal Thermal Sensation Line with Varying Characteristics of Mean Skin Temperature and Skin Wettedness
SAKOI Tomonori, MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi, KATADA Kenji, Transactions of the Society of Heating,Air-Conditioning and Sanitary Engineers of Japan., 25, 79, 11, 17, Oct. 2000, [Peer-reviewed]
Mean skin temperature and skin wettedness are widely used as parameters in good relation to man's thermal sensation. It is said that mean skin temperature is closely related to the heat stress, and that skin wettedness is to the thermoregulatory strain. In the present research, the authors paid attention to mean skin temperature and skin wettedness when man felt constant thermal sensation and reanalyzed the results of 21 experiments in which 4 young naked male subjects under sitting-reading felt "equal warm sensation". All of these experiments were conducted in a still-air test chamber. From the characteristic change of mean skin temperature, skin wettedness and evaporation heat loss and development of formulae, the following concussions were obtained. 1. The observed and calculated differential coefficient of equal "warm" sensation line on the psychrometric chart shows all minus. The values indicate larger in the higher humidity environment and smaller in the lower humidity environment. 2. The effect of humidity on thermal sensation is larger under the higher humidity environment and it decreases with the shift to the lower humidity environment. 3. Under the environments where man feels an equal warm sensation, mean skin temperature and skin wettedness don't hold constant value but varied with the environmental conditions. The effect of wettedness on thermal sensation is larger under the higher humidity environment and less under the lower humidity environment. As the results, when man feels an equal thermal sensation, the change of mean skin temperature is larger under the conditions with larger skin wettedness i.e. under higher humidity conditions and is smaller under conditions with smaller skin wettedness i.e. under lower humidity conditions 4. In warm or hot environments, the locus of equal thermal sensation lines are close to constant skin wettedness lines under the high humidity environments and are close to constant mean skin temperature lines under low humidity environments. 5. (S)ET^* calculated actually evaluated the effect of humidity excessively., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Active Energy Conservation Techniques in Hokkaido and Their Future.
NAGANO KATSUNORI, 空気調和・衛生工学, 74, 9, 769, 773, 05 Sep. 2000
Japanese

Active Energy Conservation Techniques in Hokkaido and Their Future
NAGANO Katsunori, 空気調和・衛生工学, 74, 9, 769, 773, Sep. 2000
空気調和・衛生工学会, Japanese

Heat Storage in an Aquifer and Production of Activated Carbon Using Waste Tires
NAKAMURA Makoto, NAGANO Katsunori, YOKOYAMA Shintaro, KOBATA Takeji, HAMADA Yasuhiro, OCHIFUJI Kiyoshi, Transactions of the Society of Heating,Air-Conditioning and Sanitary Engineers of Japan., 25, 77, 21, 30, Apr. 2000, [Peer-reviewed]
The heat storage and the production of the activated carbon using the waste tires boiler have been studied in order to clarify the effectiveness in energy savings and reuse of used tires. The generations of hot water, steam with high pressure and activated carbon have been measured. We have also investigated temperatures, water quantity and thermal energy into and out of the aquifer for a long time of 14 years. It is found that this system is effective in long and short term heat storage and the total heat recovery rate reaches approximately 70%. The results of simulation are in good agreement with the actual results. We have also measured the underground water quality and the contents of polluted substances and confirmed the underground water safety., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Fundamental Study on Evaluation of Clothing Thermal Insulation
SAKOI Tomonori, NAGANO Katsunori, MOCHIDA Tohru, SHIMAKURA Kazumi, Transactions of the Society of Heating,Air-Conditioning and Sanitary Engineers of Japan., 25, 77, 95, 107, Apr. 2000, [Peer-reviewed]
Clothing is one of the six main factors which influence man's thermal sensation. Therefore, it is important to learn the characteristics of clothing thermal insulation more precisely. In the present study, the effect of segmental characteristics on clothing thermal insulation is clarified from the following three points of view: considerations on 2-segment model, comparison with ISO-9920 data, and experiments using four young male subjects and a heated thermal manikin. In this paper, segmental clothing resistance values are given for 23-types of garments and 49 clothing ensembles, and a new segment model for evaluating the influence of form of dressing and clothing asymmetry on clothing thermal insulation is proposed. The following conclusions can be reached from this research. 1. In cases where clothing concentrates on particular parts on the body, the larger the original clothing insulation is, the-lower-the-effect-of-added clothing becomes. On the other hand, in cases where clothing scatters on the whole body, the effect of added garments on clothing insulation becomes larger than that of the garment alone. 2. Wearing a pair of gloves or a hat increases clothing thermal insulation effectively, and the larger the original clothing insulation, the larger the effect. 3. The regression line of clothing insulation from the sum of the component garments' becomes curved with a steep slope in light dressing conditions, and with a gentle slope under heavy dressing condition. When thermal exchange between man and his environment is taken into consideration, the effect caused by the error associated with the estimation of clothing insulation becomes larger in light dressing conditions, and becomes smaller in heavy dressing conditions. As a result, when new regression equations for evaluating clothing thermal insulation are calculated, it is effective to define the design data according to the scope. 4. The following equations were derived for estimating clothing insulation: {I_<cl>=1.131ΣI_<cluj>…(0clo&le;ΣI_<cluj<&le;0.7clo), I_<cl>=0.877ΣI_<cluj>+0.178…(ΣI_<cluj>&ge;0.7clo)} where, I_d is the intrinsic clothing insulation of an ensemble in clo units, and I_<cluj> is the effective clothing insulation of the component garment in clo units. 5. In cold and neutral thermal environments, clothing insulation varied by environmental operative temperature by approximately 5 to 10 %. In cases in which the clothing insulation values given for thermal comfort are used to evaluate cold- to neutral-thermal environments, this phenomenon overestimates heat loss and leads to a more severe evaluation of thermal sensation than actually occurs. As a result, this phenomenon operates safely on the evaluation of thermal sensations and may be negligible. 6. From the equations expressed in terms of the sum of the component garments' insulation, it is impossible to evaluate the influence of form of dressing and clothing asymmetry on clothing thermal insulation, but it is possible to evaluate this influence from the equations derived from our segment model., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

A Study on large scale underground cold energy storage by using snow for district cooling system　　　　　　　　　　　　　　　
K. Nagano, T. Mochida, T. Miyazaki, K. Shimakura, Proceedings of the 3rd Inter- national Conference on Cold Climate Heating, Ventilating and Air-Conditioning, Sapporo, Japan, 2000, 75, 80, 2000

Database of low energy houses in the world and analyses on their trends　　　　　　　　　　　　　　　
Y. Hamada, N. Nakamura, K. Ochifuji, K. Nagano, S. Yokoyama, H. Kubota, Proceedings of the 3rd Inter- national Conference on Cold Climate Heating, Ventilating and Air-Conditioning, Sapporo, Japan, 2000, 157, 162, 2000

Thermal characteristics of manganese（II）nitrate hexahydrate as phase change material for cold energy storage　　　　　　　　　　　　　　　
K. Nagano, T. Mochida, K. Iwata, H. Horikawa, R. Domański, M. Rebow, Proceedings of the 3rd Inter- national Conference on Cold Climate Heating, Ventilating and Air-Conditioning, Sapporo, Japan, 2000, 117, 122, 2000

Development of a hybrid PV module united with a wallboard　　　　　　　　　　　　　　　
K. Nagano, T. Mochida, K. Shimakura, K. Murashita, Proceedings of the 3rd Inter- national Conference on Cold Climate Heating, Ventilating and Air-Conditioning, Sapporo, Japan, 2000, 269, 275, 2000

An influence of natural convection upon heat recovery rate of aquifer thermal energy storage　　　　　　　　　　　　　　　
K. Nagano, T. Mochida, K. Shimakura, Proceedings of the 3rd Inter- national Conference on Cold Climate Heating, Ventilating and Air-Conditioning, Sapporo, Japan, 2000, 365, 370, 2000

Development of a ground heat exchanger united with a sewer pipe　　　　　　　　　　　　　　　
K. Nagano, T. Mochida, K. Honda, K. Tomita, Proceedings of the 3rd Inter- national Conference on Cold Climate Heating, Ventilating and Air-Conditioning, Sapporo, Japan, 2000, 371, 376, 2000

Equal thermal sensation lines in warm and cool regions at sedentary activity
T. Sakoi, T. Mochida, K. Nagano, K. Shimakura, Proceedings of the 3rd Inter- national Conference on Cold Climate Heating, Ventilating and Air-Conditioning, Sapporo, Japan, 2000, 565, 570, 2000

Change of clothing thermal Insulation value with physiological response　　　　　　　　　　　　　　　
T. Sakoi, T. Mochida, K. Nagano, K. Shimakura, Proceedings of the 3rd Inter- national Conference on Cold Climate Heating, Ventilating and Air-Conditioning, Sapporo, Japan, 2000, 571, 576, 2000

Effective radiant temperature and operative temperature including solar radiation　　　　　　　　　　　　　　　
K. Kuwabara, M. Kondo, T. Mochida, K. Nagano, Proceedings of the 3rd Inter- national Conference on Cold Climate Heating, Ventilating and Air-Conditioning, Sapporo, Japan, 2000, 577, 582, 2000

Mean and local convective heat transfer coefficient of human body－experiments using a thermal manikin　　　　　　　　　　　　　　　
K. Kuwabara, T. Mochida, K. Nagano, K. Shimakura, Proceedings of the 3rd Inter- national Conference on Cold Climate Heating, Ventilating and Air-Conditioning,Sapporo, Japan, 2000, 583, 588, 2000

An experimental study on influence of natural convection on Darcy’s flow with a vertical temperature difference for the aquifer thermal energy storage　　　　　　　　　　　　　　　
K. Nagano, T. Mochida, K. Shimakura, Proceedings of 8th Inter- national Conference on Thermal Energy Storage TERRASTOCK, Stuttgart, Germany, 2000, 111, 116, 2000

Development of new PCM for TES of the cooling system　　　　　　　　　　　　　　　
K. Nagano, T. Mochida, K. Iwata, H. Horikawa, R. Domanski, M. Rebow, Proceedings of 8th Inter- national Conference on Thermal Energy Storage TERRASTOCK, Stuttgart, Germany, 2000, 345, 350, 2000

Study of natural convection in manganese (II) nitrate hexahydrate inside a differentially heated cavity　　　　　　　　　　　　　　　
R. Domański, K. Nagano, M. Rebow, T. Mochida, Proceedings of 8th Inter- national Conference on Thermal Energy Storage TERRASTOCK, Stuttgart, Germany, 2000, 351, 356, 2000

Field experiments on the compaction of stored snow in the ground and a computational simulation for large scale cooling system by using snow storage　　　　　　　　　　　　　　　
K. Nagano, T. Mochida, T. Miyazaki, K. Shimakura, Proceedings of 8th Inter- national Conference on Thermal Energy Storage TERRASTOCK, Stuttgart, Germany, 2000, 441, 446, 2000

Operating results of ground source heat pump in low Energy house　　　　　　　　　　　　　　　
Y. Hamada, K. Ochifuji, K. Nagano, M. Nakamura, S. Yokoyama, Proceedings of 8th Inter- national Conference on Thermal Energy Storage TERRASTOCK, Stuttgart, Germany, 2000, 557, 562, 2000

Study on Hybrid Utilization of Renewable Energy for Low Energy House. Part 2. Operating Results and Evaluation of Experimental House.
HAMADA YASUHIRO, OCHIFUJI KIYOSHI, YOKOYAMA SHINTARO, NAGANO KATSUNORI, NAKAMURA MAKOTO, 空気調和・衛生工学会論文集, 25, 76, 59, 67, Jan. 2000, [Peer-reviewed]
Japanese

Utilization of Natural Energy Resources in Hokkaido and possibility of its development(Panel Discussion)
NAGANO Katsunori, Proceedings of the ... Symposium on Human-Environment System, 23, 140, 143, 02 Dec. 1999
Japanese Society of Human-Environment System, Japanese

Experiments to Evaluate Thermal Environments in a Low Energy House
Mochida Tohru, Nagano Katsunori, Shimakura Kazumi, Komatsu Keisuke, Proceedings of the ... Symposium on Human-Environment System, 23, 36, 39, 02 Dec. 1999
Japanese Society of Human-Environment System, Japanese

Investigation into ET^* and the Form of an Equal Thermal Sensation Line from Experiments Conducted in Warm Environments
SAKOI Tomonori, MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi, Proceedings of the ... Symposium on Human-Environment System, 23, 2, 5, 02 Dec. 1999
Japanese Society of Human-Environment System, Japanese

Consideration of Thermal Load of PMV from Thermal Equilibrium and Experiments
SAKOI Tomonori, MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi, AIHARA Satoshi, SARUTA Ayumi, Proceedings of the ... Symposium on Human-Environment System, 23, 6, 9, 02 Dec. 1999
Japanese Society of Human-Environment System, Japanese

The Effect of Clothing Concentration on Clothing Thermal Insulation
SAKOI Tomonori, MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi, Proceedings of the ... Symposium on Human-Environment System, 23, 128, 131, 02 Dec. 1999
Japanese Society of Human-Environment System, Japanese

Study on Operative Temperature Including Solar Radiation(Panel Discussion)
KUWABARA Kouhei, KONDO Motoo, MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi, Proceedings of the ... Symposium on Human-Environment System, 23, 160, 163, 02 Dec. 1999
Japanese Society of Human-Environment System, Japanese

A Study on Equation for Calculating Average Skin Temperature(Panel Discussion)
KUWABARA Kouhei, MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi, Proceedings of the ... Symposium on Human-Environment System, 23, 172, 175, 02 Dec. 1999
Japanese Society of Human-Environment System, Japanese

皮膚面積と熱伝達率を考慮した平均皮膚温算出式
桑原 浩平, 長野 克則, 持田 徹, 嶋倉 一實, 衛生工学シンポジウム論文集, 7, 134, 137, 01 Nov. 1999
北海道大学衛生工学会, Japanese

SETの検討と等温感線
佐古井 智紀, 長野 克則, 持田 徹, 嶋倉 一實, 衛生工学シンポジウム論文集, 7, 115, 118, 01 Nov. 1999
北海道大学衛生工学会, Japanese

Measurement of thermal and airflow environment of Low Energy House in Hokkaido
HONDA Kimihiro, 空気調和・衛生工学会学術講演会講演論文集, 1999, 3, 1353, 1356, 01 Sep. 1999
Japanese

Cold energy storage of snow and its application to the district cooling
MIYAZAKI Teruo, 空気調和・衛生工学会学術講演会講演論文集, 1999, 1, 397, 400, 10 Aug. 1999
Japanese

Study on clothing thermal insulation
SAKOI Tomonori, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 1999, 2, 893, 896, 10 Aug. 1999
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Discussion concerning PMV and corrected PMV
KIMURA Kiyoshi, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 1999, 2, 901, 904, 10 Aug. 1999
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

An Experimental Study on Phase Change Material for Peak Cut of Cooling Load
IWATA Kohe, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 1999, 2, 945, 948, 10 Aug. 1999
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Measurement of thermal and airflow environment of Low Energy House in Hokkaido
HONDA Kimihiro, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 11, 3, 1353, 1356, Aug. 1999
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Fundamental study on equation for calculating average skin temperature.
KUWABARA kouhei, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 11, 3, 1485, 1488, Aug. 1999
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Study on clothing thermal insulation
SAKOI tomonori, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 11, 2, 893, 896, Aug. 1999
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Discussion concerning PMV and corrected PMV
KIMURA kiyoshi, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 11, 2, 901, 904, Aug. 1999
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

An Experimental Study on Phase Change Material for Peak Cut of Cooling Load
IWATA Kohe, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 11, 2, 945, 948, Aug. 1999
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Energy balance of low energy house in Hokkaido and its application to other domestic regions
HAMADA Yasuhiro, OCHIFUJI Kiyoshi, NAGANO Katsunori, YOKOYAMA Shintaro, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-2, Environmental engineering II, Heat, moisture, thermal comfort, natural energy, air flow, ventilation, smoke exhaustion, computational fluid dynamics, indoor air quality, 1999, 415, 416, 30 Jul. 1999
Architectural Institute of Japan, Japanese

Characteristics of Convective Heat Transfer of Thermal Manikin Exposed in Air Flow from Front
MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi, KUWABARA Kouhei, NAKATANI Takahiro, MATSUNAGA Kazuhiko, Journal of human and living environment, 6, 2, 98, 103, Jun. 1999
In order to obtain the mean and the local convective heat transfer coefficients for the human body, experiments were performed with a thermally-controlled naked manikin in sitting and standing postures. The experiments were carried out in a test chamber in the normal temperature range. The air movement observed was between still air and 1.1 rn/s. By arranging the present experimental data, the following formulas concerning the mean convective heat transfer coefficient hc of an unclothed manikin were derived as a function of air movement V. hc=2.82+6.35V^<0.848> for sitting position, hC=10.14V^<0.431> for standing position The two formulas obtained above agree partially with the formulas proposed by Ishigaki et al. and Ichihara et al., Japanese Society of Human-Environment System, Japanese

Study on Hybrid Utilization of Renewable Energy for Low Energy House. Part 1-Total Planning and Construction of Experimental House.
HAMADA YASUHIRO, NAKAMURA MAKOTO, OCHIFUJI KIYOSHI, YOKOYAMA SHINTARO, NAGANO KATSUNORI, NAGASAKA SHIGEYUKI, 空気調和・衛生工学会論文集, 24, 73, 105, 115, 25 Apr. 1999
This study describes the construction and evaluation of a low energy house which should be in harmony with the environment and also be assisted by natural energy resources and unused energy. First of all, a concept of the low energy house and its fundamental planning for various experiments on passive and active strategies were shown. Next, energy consumption of a typical house in Hokkaido was investigated. We also evaluated the performance on thermal insulation and air-tightness of the low energy house. It was estimated that annual primary energy consumption would be approx. ten percent of typical house's one in Hokkaido. Experiments started on June 1, 1997. Results in June showed that they were successfully operated., The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan, Japanese

An Experimental Study on Influences of Natural Convection on Darcy's Flow with a Vertical Temperature Difference for the Aquifer Thermal Energy Storage
NAGANO Katsunori, SHIMAKURA Kazumi, MOCHIDA Tohru, OCHIFUJI Kiyoshi, KADOKAWA Kozaburo, Transactions of the Society of Heating,Air-Conditioning and Sanitary Engineers of Japan., 24, 73, 47, 56, Apr. 1999, [Peer-reviewed]
Warm water was injected into the porous medium of a test section, which was filled with a saturated glass beads-water mixture and was cooled at the upper and the lower wall, in imitation of the aquifer thermal energy storage. Characteristics of temperature distributions and flow rate distributions at the outlet were measured. Influences of natural convection on these distributions were examined. A computer simulation program was made for calculating distributions of the temperature and the velocity vector in the porous medium with natural convection as well as forced convection. Calculated temperature distributions and flow rate distributions at the outlet were similar to the experimental results. It was clarified that characteristics of experimental results were caused by natural convection in the porous medium. Also, an index of a natural convection influence on the forced convection was proposed., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

等しい温熱感を申告した時の平均皮膚温とぬれ面積率の関係に関する基礎的研究
持田 徹, 堅田 兼史, 長野 克則, 嶋倉 一實, 佐古井 智紀, 空気調和・衛生工学, 73, 3, 228, 228, 05 Mar. 1999
Japanese

暑暖領域における温熱感に及ぼす湿度の影響
持田 徹, 堅田 兼史, 長野 克則, 吉野 博, BERGLUND L. G., 佐古井 智紀, 嶋倉 一實, 空気調和・衛生工学, 73, 3, 228, 228, 05 Mar. 1999
Japanese

暑暖領域における温熱感に及ぼす湿度の影響
持田 徹, 堅田 兼史, 長野 克則, 吉野 博, BERGLUND L. G, 佐古井 智紀, 嶋倉 一實, 空気調和・衛生工学会論文集, 24, 72, 67, 74, Mar. 1999, [Peer-reviewed]
Japanese

Influence of Environmental Humidity on Thermal Sensation of Warmth
MOCHIDA Tohru, BERGLUND L. G., KATADA Kenji, SAKOI Tomonori, NAGANO Katsunori, SHIMAKURA Kazumi, YOSHINO Hiroshi, Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 24, 72, 67, 74, 1999
Average skin temperature and skin wettedness were observed when man felt an equal thermal sensation of warmth. The experiments were carried out using young, healthy, male Japanese students to obtain the values of wettedness and average skin temperature in high-, middle-, and low-humidity environments when they felt an equal warmth. The experiments were conducted on sitting-reading subjects in a test chamber. The subjects were dressed only in athletic short and were exposed to warm conditions for one hour or so. From the analysis of our experimental data, the following conclusions were drawn regarding an equal thermal sensation. 1. Skin wettedness correlates positively with the vapor pressure and correlates negatively with the air temperature. 2. Skin wettedness correlates negatively with the evaporative heat loss from the skin surface. 3. There is a constant relation between skin wettedness and average skin temperature, when man feels an equal thermal sensation. In other words, an equal thermal sensation cannot be indicated merely at constant average skin temperature or at constant skin wettedness as PMV and ET^* define, but it can be determined rather at a constant condition where a kind of modified total of the average skin temperature and the skin wettedness remains constant. Under the above-mentioned condition, the theoretical line of equal thermal sensation obtained from the heat balance equation between the man and the environment is curved line, not a straight line, plotted on a psychrometric chart. The curved line of the sensation "very hot", for instance, shows a small slope down until approximately 50% relative humidity. When the relative humidity is less than 50%, the gradient of the line is steep, and the influence of the humidity on the thermal sensation becomes small., The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan, Japanese

地価冷熱蓄熱に関する実験
長野克則, 空気調和衛生工学会北海道支部編, 165, 168, 1999

Energy balance of low energy house with ground source heat pump in Hokkaido
Yasuhiro Hamada, Kiyoshi Ochifuji, Makoto Nakamura, Katsunori Nagano, SAE Technical Papers, P1.1, 1.6, 1999
This study describes the construction and evaluation of a low energy house which should be in harmony with the environment and also be assisted by hybrid natural energy resources and unused energy. An experimental house with ground source heat pump (GSHP) was built in Hokkaido University, Japan in March, 1997. As a result of experiments, it was shown that approx. 80 % of the total energy was provided from PV modules, solar collectors, underground and exhaust heat. Annual energy consumption was 12.5 % of typical house's one in Hokkaido. This report describes an outline of the low energy house and experimental energy balance. Copyright © 1999 Society of Automotive Engineers, Inc., English

Evaluation of feasibility to introduce utilization of solar and wind energy. Analysis of energy saving effect of urban waste heat utilization. (Ministry of Education S).
OCHIFUJI KIYOSHI, NAGANO KATSUNORI, YOKOYAMA SHINTARO, MOCHIDA TOORU, HAMADA YASUHIRO, 年間蓄熱サイクルを考慮したエネルギー自律型住宅の実験とその評価に関する研究 平成10年度 No.08405039, 323, 348, 1999
Japanese

Evaluation of feasibility to introduce utilization of solar and wind energy. Experiment and analysis of hybrid collectors of solar energy. (Ministry of Education S).
OCHIFUJI KIYOSHI, NAGANO KATSUNORI, YOKOYAMA SHINTARO, MOCHIDA TOORU, HAMADA YASUHIRO, 年間蓄熱サイクルを考慮したエネルギー自律型住宅の実験とその評価に関する研究 平成10年度 No.08405039, 29, 49, 1999
Japanese

Evaluation of feasibility to introduce utilization of solar and wind energy. Evaluation method of soil heat utilization system and heat transfer characteristics of low-cost U-tube type heat exchanger. (Ministry of Education S).
OCHIFUJI KIYOSHI, NAGANO KATSUNORI, YOKOYAMA SHINTARO, MOCHIDA TOORU, HAMADA YASUHIRO, 年間蓄熱サイクルを考慮したエネルギー自律型住宅の実験とその評価に関する研究 平成10年度 No.08405039, 129, 155, 1999
Japanese

Evaluation of feasibility to introduce utilization of solar and wind energy. Experiment on a residential house with autonomic energy system and evaluation of its results. (Ministry of Education S).
OCHIFUJI KIYOSHI, NAGANO KATSUNORI, YOKOYAMA SHINTARO, MOCHIDA TOORU, HAMADA YASUHIRO, 年間蓄熱サイクルを考慮したエネルギー自律型住宅の実験とその評価に関する研究 平成10年度 No.08405039, 245, 299, 1999
Japanese

Evaluation of feasibility to introduce utilization of solar and wind energy. Examination of effect of introducing cogeneration system to community according to composition of building use type. (Ministry of Education S).
OCHIFUJI KIYOSHI, NAGANO KATSUNORI, YOKOYAMA SHINTARO, MOCHIDA TOORU, HAMADA YASUHIRO, 年間蓄熱サイクルを考慮したエネルギー自律型住宅の実験とその評価に関する研究 平成10年度 No.08405039, 349, 382, 1999
Japanese

Evaluation of feasibility to introduce utilization of solar and wind energy. Experiment of adaptation limit in cold water floor heating system and its application to detached housing. (Ministry of Education S).
OCHIFUJI KIYOSHI, NAGANO KATSUNORI, YOKOYAMA SHINTARO, MOCHIDA TOORU, HAMADA YASUHIRO, 年間蓄熱サイクルを考慮したエネルギー自律型住宅の実験とその評価に関する研究 平成10年度 No.08405039, 185, 221, 1999
Japanese

Evaluation of feasibility to introduce utilization of solar and wind energy. International trend of research and development of technology for heat storage in aquifer. (Ministry of Education S).
OCHIFUJI KIYOSHI, NAGANO KATSUNORI, YOKOYAMA SHINTARO, MOCHIDA TOORU, HAMADA YASUHIRO, 年間蓄熱サイクルを考慮したエネルギー自律型住宅の実験とその評価に関する研究 平成10年度 No.08405039, 383, 387, 1999
Japanese

Evaluation of feasibility to introduce utilization of solar and wind energy. Long term measurement of earth temperature and development of method for predicting them. (Ministry of Education S).
OCHIFUJI KIYOSHI, NAGANO KATSUNORI, YOKOYAMA SHINTARO, MOCHIDA TOORU, HAMADA YASUHIRO, 年間蓄熱サイクルを考慮したエネルギー自律型住宅の実験とその評価に関する研究 平成10年度 No.08405039, 99, 127, 1999
Japanese

Evaluation of feasibility to introduce utilization of solar and wind energy. Construction of a residential house with autonomic energy system and planning of its experiments. (Ministry of Education S).
OCHIFUJI KIYOSHI, NAGANO KATSUNORI, YOKOYAMA SHINTARO, MOCHIDA TOORU, HAMADA YASUHIRO, 年間蓄熱サイクルを考慮したエネルギー自律型住宅の実験とその評価に関する研究 平成10年度 No.08405039, 223, 243, 1999
Japanese

Evaluation of feasibility to introduce utilization of solar and wind energy. Examination of effect of introducing wind power generation to urban buildings. (Ministry of Education S).
OCHIFUJI KIYOSHI, NAGANO KATSUNORI, YOKOYAMA SHINTARO, MOCHIDA TOORU, HAMADA YASUHIRO, 年間蓄熱サイクルを考慮したエネルギー自律型住宅の実験とその評価に関する研究 平成10年度 No.08405039, 51, 98, 1999
Japanese

Evaluation of feasibility to introduce utilization of solar and wind energy. Long term demonstrative experiment and analysis of ground source heat pump. (Ministry of Education S).
OCHIFUJI KIYOSHI, NAGANO KATSUNORI, YOKOYAMA SHINTARO, MOCHIDA TOORU, HAMADA YASUHIRO, 年間蓄熱サイクルを考慮したエネルギー自律型住宅の実験とその評価に関する研究 平成10年度 No.08405039, 157, 183, 1999
Japanese

Evaluation of feasibility to introduce utilization of solar and wind energy. Measurement and analysis of photovoltaic power generation in snowy areas. (Ministry of Education S).
OCHIFUJI KIYOSHI, NAGANO KATSUNORI, YOKOYAMA SHINTARO, MOCHIDA TOORU, HAMADA YASUHIRO, 年間蓄熱サイクルを考慮したエネルギー自律型住宅の実験とその評価に関する研究 平成10年度 No.08405039, 1, 27, 1999
Japanese

Evaluation of feasibility to introduce utilization of solar and wind energy. Experimental examination of influence of natural convection on Darcy's flow with temperature gradient with objective of heat storage in aquifer. (Ministry of Education S).
OCHIFUJI KIYOSHI, NAGANO KATSUNORI, YOKOYAMA SHINTARO, MOCHIDA TOORU, HAMADA YASUHIRO, 年間蓄熱サイクルを考慮したエネルギー自律型住宅の実験とその評価に関する研究 平成10年度 No.08405039, 389, 405, 1999
Japanese

Evaluation of feasibility to introduce utilization of solar and wind energy. Cities to be investigated for possibility of using unutilized energy resources and estimation of their energy demand. (Ministry of Education S).
OCHIFUJI KIYOSHI, NAGANO KATSUNORI, YOKOYAMA SHINTARO, MOCHIDA TOORU, HAMADA YASUHIRO, 年間蓄熱サイクルを考慮したエネルギー自律型住宅の実験とその評価に関する研究 平成10年度 No.08405039, 301, 322, 1999
Japanese

Fundamental Study concerning the Relationship between Average Skin Temperature and Wettedness When Man Feels an Equal Thermal Sensation
MOCHIDA Tohru, SHIMAKURA Kazumi, KATADA Kenji, SAKOI Tomonori, NAGANO Katsunori, Transactions of the Society of Heating,Air-Conditioning and Sanitary Engineers of Japan., 24, 72, 107, 116, Jan. 1999, [Peer-reviewed]
It is believed that in the hot environments, wettedness as well as average skin temperature reveals man's physiological condition accurately. With a purpose to investigate the relationship between average skin temperature and wettedness of man that feels an equal thermal sensation, the experiments were conducted on sitting-resting subjects in a test chamber. The subjects were dressed in athletic short and were exposed to warm conditions for one hour. The results obtained from the present experiments are as follows: 1) The evaporative heat loss from the skin surface correlates positively with the air temperature, while it correlates negatively with the environmental vapor pressure. 2) Wettedness correlates negatively with the air temperature and correlates positively with the vapor pressure. 3) Average skin temperature correlates positively with the air temperature and also negatively with the vapor pressure. 4) Evaporative heat loss correlates negatively with wettedness and correlates positively with average skin temperature. 5) Average skin temperature correlates negatively with wettedness. From the analysis of the present experimental data, the following conclusions were drawn regarding an equal thermal sensation. When subjects voted the thermal sensation "warm", the average skin temperature and the wettedness hold different values depending upon the different combination of ambient air temperature and environmental humidity. In other words, as the humidity gets higher, the average skin temperature goes down and the wettedness becomes larger. In addition a constant relation between average skin temperature and wettedness is observed. Upon calculating the gradients of five different environments from the observed experimental values, we obtained the results stated below. 1) All the gradient values indicate below zero. 2) As the environmental humidity goes higher the absolute value of gradient becomes smaller, and as the humidity lower, the absolute value bigger. It means that both experimentally and theoretically the locus of equal thermal sensation could not be a straight line. Rather it should be a curved line plotted on a psychrometric chart., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

標準熱回収率による地下熱利用システムの評価方法および住宅への導入効果に関する研究
濱田 靖弘, 落藤 澄, 長野 克則, 中村 真人, 横山 真太郎, 永坂 茂之, 空気調和・衛生工学, 72, 12, 1122, 1122, 05 Dec. 1998
Japanese

標準熱回収率による地下熱利用システムの評価方法および住宅への導入効果に関する研究
濱田 靖弘, 落藤 澄, 長野 克則, 中村 真人, 横山 真太郎, 永坂 茂之, 空気調和・衛生工学会論文集, 23, 71, 53, 62, Dec. 1998, [Peer-reviewed]
Japanese

113 ぬれ面積率の特性と等温感(S1-Pポスター発表, Session 1温熱生理1)
持田 徹, 長野 克則, 堅田 兼史, Berglund L. G, 吉野 博, 嶋倉 一實, 佐古井 智紀, 人間-生活環境系シンポジウム報告集, 98, 20, 20, 16 Nov. 1998
人間-生活環境系学会, Japanese

114 屋外環境における体感温評価(S1-Pポスター発表, Session 1温熱生理1)
持田 徹, 長野 克則, 山内 清志, 猶原 教博, 小西 竜正, 桑原 浩平, 人間-生活環境系シンポジウム報告集, 98, 20, 20, 16 Nov. 1998
人間-生活環境系学会, Japanese

等温感域に関する基礎的研究
佐古井 智紀, 持田 徹, 長野 克則, 嶋倉 一實, 堅田 兼史, 衛生工学シンポジウム論文集, 6, 173, 178, 01 Nov. 1998
北海道大学衛生工学会, Japanese

サーマルマネキンの局所および平均対流熱伝達率
桑原 浩平, 持田 徹, 長野 克則, 嶋倉 一實, 中谷 貴弘, 松永 和彦, 衛生工学シンポジウム論文集, 6, 167, 172, 01 Nov. 1998
北海道大学衛生工学会, Japanese

The Influence of Natural Free Convection on Heat Recovery Rate of Aquifer Thermal Energy Storage
NAGANO Katsunori, MOCHIDA Tohru, OCHIFUJI Kiyoshi, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-2, Environmental engineering II, Heat, moisture, thermal comfort, natural energy, air flow, ventilation, smoke exhaustion, computational fluid dynamics, indoor air quality, 1998, 39, 40, 30 Jul. 1998
Architectural Institute of Japan, Japanese

Locus of Equal Thermal Sensation When a Kind of Modified Total of Skin Temperature and Wettedness Shows Constant
MOCHIDA Tohru, NAGANO Katsunori, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-2, Environmental engineering II, Heat, moisture, thermal comfort, natural energy, air flow, ventilation, smoke exhaustion, computational fluid dynamics, indoor air quality, 1998, 361, 362, 30 Jul. 1998
Architectural Institute of Japan, Japanese

Operating results and evaluation of a low energy house
HAMADA Yasuhiro, OCHIFUJI Kiyoshi, NAGANO Katsunori, Summaries of technical papers of Annual Meeting Architectural Institute of Japan. D-2, Environmental engineering II, Heat, moisture, thermal comfort, natural energy, air flow, ventilation, smoke exhaustion, computational fluid dynamics, indoor air quality, 1998, 525, 526, 30 Jul. 1998
Architectural Institute of Japan, Japanese

An Effect on Energy-Saving of Cooling Demand by Using Phase Change Material
MIYAZAKI Teruo, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 10, 1, 433, 436, 10 Jul. 1998
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

A study on the thermal performance of Low Energy House in various parts of Japan
NAKAMURA takuji, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 10, 1, 225, 228, 10 Jul. 1998
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Natural convection in aquifer thermal energy storage
KADOKAWA Kozaburo, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 10, 2, 1101, 1104, 10 Jul. 1998
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Evaluation of Thermal Sensation in Outdoor Environment
KONISHI Ryousei, Proceedings of 2nd International Conference on Human- Environment System,Yokohama, Japan, 1998, 10, 2, 961, 964, 10 Jul. 1998, [Peer-reviewed]
社団法人空気調和・衛生工学会, Japanese

Experiment concerning Cold Sensation Using Subjects and its Equal Sensation Line
SAKOI Tomonori, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 10, 2, 929, 932, 10 Jul. 1998
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Effect of Environmental Humidity on the Line of Equal Thermal Sensation
KATADA Kenji, Berglund L.G, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 10, 2, 925, 928, 10 Jul. 1998
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Convective Heat Transfert Coefficient Measured with a Thermal-Manikin
KUWABARA Kouhei, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 10, 2, 913, 916, 10 Jul. 1998
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Prospects and Potentialities of Snow melting system (SMS) using Underground thermal energy storage (UTES) in Japan
IWAMOTO kinya, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 10, 2, 885, 888, 10 Jul. 1998
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

A Study on Possibility of Reducing the Consumption of the Domestic Energy by Using Natural Energy and Un-used Energy in Sapporo
MURASHITA Kazunori, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 10, 2, 877, 880, 10 Jul. 1998
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Operating results evalution of a low energy house : Part.1 An outline of experiments and evaluation on annual energy balance
YAMAZAKI shogo, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 10, 2, 817, 820, 10 Jul. 1998
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Locus of Equal Thermal Sensation When a Kind of Modified Total of Skin Temperature and Wettedness Shows Constant.
MOCHIDA TOORU, NAGANO KATSUNORI, 日本建築学会学術講演梗概集D-2 環境工学2, 1998, 361, 362, Jul. 1998
Japanese

The Influence of Natural Free Convection on Heat Recovery Rate of Aquifer Thermal Energy Storage.
NAGANO KATSUNORI, MOCHIDA TOORU, OTOFUJI KIYOSHI, 日本建築学会学術講演梗概集D-2 環境工学2, 1998, 39, 40, Jul. 1998
Japanese

Operating results and evaluation of a low energy house.
HAMADA YASUHIRO, OCHIFUJI KIYOSHI, NAGANO KATSUNORI, 日本建築学会学術講演梗概集D-2 環境工学2, 1998, 525, 526, Jul. 1998
Japanese

北海道大学ロ-エネルギ-ハウス
長野 克則, 浜田 靖弘, 落藤 澄, 建築設備士, 30, 5, 21, 26, May 1998
建築設備技術者協会, Japanese

061 Operating results and evaluation of a low energy house : Part.1 An outline of experiments and evaluation methods
HAMADA Yasuhiro, 日本建築学会北海道支部研究報告集, 71, 241, 244, 24 Mar. 1998
Architectural Institute of Japan, Japanese

062 Operating results and evaluation a low energy house : Part.2 Annual energy balance and evaluation of a low energy house
YAMAZAKI Shogo, 日本建築学会北海道支部研究報告集, 71, 245, 248, 24 Mar. 1998
Architectural Institute of Japan, Japanese

063 Prospects and Potentialities of Snow melting system(SMS) using Underground thermal energy storage(UTES) in Japan
Iwamoto Kinya, 日本建築学会北海道支部研究報告集, 71, 249, 252, 24 Mar. 1998
Architectural Institute of Japan, Japanese

積雪地における地下熱利用のための地中温度の予測に関する研究
濱田 靖弘, 中村 真人, 横山 真太郎, 長野 克則, 永坂 茂之, 落籐 澄, 空気調和・衛生工学, 72, 3, 248, 248, 05 Mar. 1998
Japanese

Operating results and evaluation of a low energy house. Part 1. An outline of experiments and evaluation methods.
HAMADA YASUHIRO, OCHIFUJI KIYOSHI, NAKAMURA MASATO, NAGANO KATSUNORI, YAMAZAKI SHOGO, 日本建築学会北海道支部研究報告集, 71, 241, 244, Mar. 1998
Japanese

Operating results and evaluation a low energy house. Part 2. Annual energy balance and evaluation of a low energy house.
YAMAZAKI SHOGO, HAMADA YASUHIRO, OCHIFUJI KIYOSHI, NAKAMURA MASATO, NAGANO KATSUNORI, 日本建築学会北海道支部研究報告集, 71, 245, 248, Mar. 1998
Japanese

Prospects and Potentialities of Snow melting system(SMS) using Underground thermal energy storage(UTES) in Japan.
IWAMOTO KIN'YA, NAGASAKA SHIGEYUKI, OCHIFUJI KIYOSHI, NAGANO KATSUNORI, FUJIWARA YOZO, ISHII SHINJI, 日本建築学会北海道支部研究報告集, 71, 249, 252, Mar. 1998
Architectural Institute of Japan, Japanese

積雪地における地下熱利用のための地中温度の予測に関する研究
濱田 靖弘, 中村 真人, 横山 真太郎, 長野 克則, 永坂 茂之, 落籐 澄, 空気調和・衛生工学会論文集, 23, 68, 91, 100, Mar. 1998, [Peer-reviewed]
Japanese

Evaluation of Underground Thermal Energy Utilization by using Standard Thermal Recovery Ratio and its Application to a Residential Heating System
HAMADA Yasuhiro, NAKAMURA Makoto, OCHIFUJI Kiyoshi, YOKOYAMA Shintaro, NAGANO Katsunori, NAGASAKA Shigeyuki, Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 23, 71, 53, 62, 1998
This study describes analyses and experiments on fundamental thermal characteristics of vertical heat exchanger's annual energy cycle in order to specify the availability of underground thermal energy utilization for heating and cooling. First of all, it was shown that a single bore-field was more effectively utilized as a heat source and a multiple bore-field as a storage medium. This was determined by analyses on standard thermal recovery ratio. A multiple bore-field has an optimum bore-spacing which maximizes the amount of heat extraction. Next, we evaluated the performance of a ground source heat pump system by experiments and analyses. We found that underground thermal energy could be utilized over a long period of time. We also compared the ground source heat pump and an air source heat pump for heating of a super insulated house. The ground source heat pump is a superior heating system for energy conservation and environmental protection., The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan, Japanese

A Study on Earth Temperature in a Snowy Region for Underground Thermal Energy Storage (UTES)
HAMADA Yasuhiro, NAGANO Katsunori, NAKAMURA Makoto, NAGASAKA Shigeyuki, YOKOYAMA Shintaro, OCHIFUJI Kiyoshi, Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 23, 68, 91, 100, 1998
This study describes the long-term measurement and numerical analyses of earth temperature profile under natural climatic conditions in order to make a fundamental data base for Underground Thermal Energy Storage (UTES). First of all, we have measured the earth temperature for about two years at the observing station, which was constructed in Sapporo in 1994. As a result, the temperature of a constant earth temperature layer was approximately 10.3℃. Next, we prepared a calculation program of earth temperature for a snowy region. The results of the calculated earth temperature and snow depth on this program mostly agreed to that measured at the observing station. Also, it was found that the calculation program can be used efficiently in other domestic regions., The Society of Heating, Air-Conditioning & Sanitary Engineers of Japan, Japanese

放射冷房の熱的快適性とその評価に関する実験的検討
長野克則, 空気調和 衛生工学会北海道支部第32回学術講演論文集, 1998. 3, 1998

Prospects of snow melting systems using underground thermal energy storage in Japan
K. Iwamoto, S. Nagasaka, Y. Hamada, M. Nakamura, K. Ochifuji, K. Nagano, Proceedings of the 2nd Stockton International Geothermal Conference, Stockton, USA, 1998, 71, P4.1, 4.6, 1998
Architectural Institute of Japan, Japanese

Characteristics of skin wettedness and equal thermal sensation　　　　　　　　　　　　　　　
T. Mochida, K. Nagano, K. Katada, L. G. Berglund, H. Yoshino, K. Shimakura, T. Sakoi, Proceedings of 2nd International Conference on Human- Environment System, Yokohama, Japan, 1998, 53, 56, 1998

Evaluation of Outdoor Environment
MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi, NAOHARA Norihiro, KONISHI Ryosei, KUWABARA Kouhei, Proceedings of the ... Symposium on Human-Environment System, 21, 81, 84, 06 Dec. 1997
Japanese Society of Human-Environment System, Japanese

An Approach to Revision of P M V
MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi, MIGITA Takuya, TAKAYA Kazuki, Proceedings of the ... Symposium on Human-Environment System, 21, 103, 106, 06 Dec. 1997
Japanese Society of Human-Environment System, Japanese

Line of Equal Thermal Sensation When a Kind of Modified Total of Skin Temperature and Wettedness Shows Constant
MOCHIDA Tohru, NAGANO Katsunori, SHIMAKURA Kazumi, KATADA Kenji, SAKOI Tomonori, Proceedings of the ... Symposium on Human-Environment System, 21, 119, 122, 06 Dec. 1997
Japanese Society of Human-Environment System, Japanese

ローエネルギーハウスの設備計画
濱田 靖弘, 長野 克則, 中村 真人, 藤原 陽三, 中村 卓司, 落藤 澄, 谷口 博, 衛生工学シンポジウム論文集, 5, 31, 34, 01 Nov. 1997
北海道大学衛生工学会, Japanese

ローエネルギーハウスに関する研究の全体計画とハウスの概要
長野 克則, 中村 真人, 濱田 靖弘, 横山 真太郎, 絵内 正道, 嶋倉 一實, 落藤 澄, 持田 徹, 荒谷 登, 佐々木 博明, 谷口 博, 衛生工学シンポジウム論文集, 5, 25, 30, 01 Nov. 1997
北海道大学衛生工学会, Japanese

長尺垂直U字形管内の蒸発熱流動の数値シミュレーション
許 路, 中村 真人, 岡田 勝利, 長野 克則, 落藤 澄, 横山 真太郎, 濱田 靖弘, 空気調和・衛生工学, 71, 8, 739, 739, 05 Aug. 1997
Japanese

広域熱電併給システムの熱供給温度に関する基礎的研究
成田 樹昭, 長野 克則, 中村 真人, 濱田 靖弘, 落藤 澄, 空気調和・衛生工学, 71, 8, 739, 739, 05 Aug. 1997
Japanese

長尺垂直U字形管内の蒸発熱流動の数値シミュレーション
許 路, 中村 真人, 岡田 勝利, 長野 克則, 落藤 澄, 横山 真太郎, 濱田 靖弘, 空気調和・衛生工学会論文集, 22, 65, 23, 31, Aug. 1997, [Peer-reviewed]
Japanese

Feasibility of district heating with making use of un-used energy in Hokkaido
TSUBOTA daisuke, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 9, 3, 1237, 1240, 20 Jul. 1997
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Estimation of Effects on Whole Area of Sapporo City by utilizing Unused Energy and/or Combined Heat & Power Production
NARITA shigeaki, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 9, 3, 1241, 1244, 20 Jul. 1997
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Evaluation of Urban Thermal Environment
NAOHARA Norihiro, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 9, 3, 1269, 1272, 20 Jul. 1997
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Simulation of Heat load with Heat Storage Pipes with Phase Change Material
SUZUKI masato, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 9, 2, 685, 688, 20 Jul. 1997
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

A fundamental study on thermal sensation and saving energy by ceiling radiant heating
KANZAKI takashi, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 9, 1, 109, 112, 20 Jul. 1997
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Revised Thermal Index of PMV
TAKAYA Kazuki, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 9, 1, 137, 140, 20 Jul. 1997
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Total Plan of Situdies about Low-Energy-House and Outline of House
NAGANO katsunori, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 9, 1, 285, 288, 20 Jul. 1997
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Equipment design for a low energy house
HAMADA yasuhiro, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 9, 1, 289, 292, 20 Jul. 1997
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

A Study on the relationship between Thermal Performance and HVAC System of Low Energy House.
NAKAMURA takuji, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 9, 1, 293, 296, 20 Jul. 1997
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Performance examination of the ground heat source heat pump equipment at the Low Energy House
KATSUDA Hiroshi, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 9, 1, 305, 308, 20 Jul. 1997
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

A study on the possibility of the introduction of wind-power generation and the improvement of the self supporting rate of electric power by combining wind-power generation with solar-cell generation in Sapporo area
TERADA hirokazu, Techinical Papers of Annual Meeting the Society of Heating,Air-conditioning and Sanitary Engineers of Japan, 9, 1, 329, 332, 20 Jul. 1997
The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese

Numerical Simulation of Evaporating Heat Transfer of Refrigerant R 22 in a Vertical Long U-tube
XU Lu, OCHIFUJI Kiyoshi, NAKAMURA Makoto, YOKOYAMA Shintaro, OKADA Katsuyuki, HAMADA Yasuhiro, NAGANO Katsunori, Transactions of the Society of Heating,Air-Conditioning and Sanitary Engineers of Japan., 22, 65, 23, 31, 25 Apr. 1997
It was simulated numerically that refrigerant R22 was evaporated in a vertical long U-tube which was used as the evaporator of direct expansion ground coupled heat pump, and the characteristics of heat transfer, flow resistance and dryout point were presented. First, the numerical simulation program of forced convective evaporation of refrigerant in a vertical U-tube was finished and the computation results showed a satisfactory agreement with the experimental results by the author. Secondly, it was made clear quantitatively that the local heat transfer coefficient and dryout point were affected by the heat flux of the tube wall, the flow rate of refrigerant and the evaporating pressure. The result of average heat transfer coefficient of the tube showed that the maximum point existed, and the heat flux of tube wall and the flow rate of refrigerant corresponding to the maximum point were calculated and figured. The results of this paper can be used in designing the direct expansion ground coupled heat pump., The Society of Heating, Air-Conditioning Sanitary Engineers of Japan, Japanese