| Project/Area Number |
11694113
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
エネルギー学一般
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| Research Institution | HOKKAIDO UNIVERSITY |
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Principal Investigator |
NAGANO Katsunori Hokkaido Univ., Grad. School of Eng., Asso. Prof., 大学院・工学研究科, 助教授 (80208032)
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| Co-Investigator(Kenkyū-buntansha) |
SASAKI Hiroaki Hokkai Gakuen Univ., Facl. of Eng., Prof., 工学部, 教授 (60128816)
HAYAMA Hirofumi Hokkaido Univ., Grad. School of Eng., Asso. Prof., 大学院・工学研究科, 助教授 (80301935)
MOCHIDA Tohru Hokkaido Univ., Grad. School of Eng., Prof., 大学院・工学研究科, 教授 (40002050)
KAKIUCHI Hiroyuki Mitsubishi Chemical Corp., New Product Incubation Lab., Research Asso., 新商品研究所, リサーチアソシエイト
TUBOTA Yuji Tokyo Electric Power Co. Inc., Electric Power Technical Center, Manager, 電力技術研究所, 主管研究員
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| Project Period (FY) |
1999 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥6,500,000 (Direct Cost: ¥6,500,000)
Fiscal Year 2001: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2000: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1999: ¥2,400,000 (Direct Cost: ¥2,400,000)
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| Keywords | Phase Change Material / Thermal Energy Storage / Latent heat storage / Granulated PCM / Direct contact / Waste Heat / Under floor Ventilation / Night time electricity / 相変化蓄熱材 / PCM / DSC / 熱応答試験 / 硝酸マンガン・6水和物 |
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| Research Abstract |
Latent heat storage is a kind of heat storage technology by using phase change materials (PCM). Authors proposed Mn(NO_3)_2・6H_2O mixed with MnCl_2・4H_2O as a new PCM for storing cold energy during night time for cooling system and Mg(NO_3) _2・6H_2O mixed with MgCl_2・6H_2O as a new PCM for storing urban waste heat such as surplus heat from co-generation system. It was clarified that chloride salts are adequate to modulate the melting point without drop of the latent heat. In addition, although only small super cooling was observed for these substances in a small vessel, that is not problem in the actual cases. Also, heat exchanging rates and stabilities of these PCM were examined. From these tests, great possibility was obtained as a PCM for thermal energy storage system.
Next, a direct heat exchange system between granulated PCM and air was proposed. PCM is consisted from granulated porous media and paraffin. Its particle diameter is about 1〜3mmφ. Advantage of this system is that heat transfer coefficient is kept relative large and continuous during phase change. 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. Next, applications this new principal to stabilization the outdoor air temperature for the ventilation system and to the under floor air conditioning system were examined
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