| Project/Area Number |
05452258
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Architectural environment/equipment
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| Research Institution | HOKKAIDO UNIVERSITY |
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Principal Investigator |
OCHIFUJI Kiyoshi Hokkaido Univ. Fac. of Eng., Pro., 工学部, 教授 (50001152)
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| Co-Investigator(Kenkyū-buntansha) |
SASAKI Hiroaki Hokkaigakuen Univ. Fac. of Eng., Pro., 工学部, 教授 (60128816)
MOCHIDA Tohru Hokkaido Univ. Fac. of Eng., Pro., 工学部, 教授 (40002050)
YOKOYAMA Shintaro Hokkaido Univ. Fac. of Eng., Asso. Pro., 工学部, 助教授 (90002279)
NAGANO Katsunori Hokkaido Univ. Fac. of Eng., Asso. Pro., 工学部, 助教授 (80208032)
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| Project Period (FY) |
1993 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥6,300,000 (Direct Cost: ¥6,300,000)
Fiscal Year 1995: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1994: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1993: ¥3,900,000 (Direct Cost: ¥3,900,000)
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| Keywords | Soil heat storage / Long term heat storage / Thermal energy cycle / Ground source heat pump / Natural cooling / 帯水層 / 冷暖房 / 地中埋設管 / 土壌熱源 |
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| Research Abstract |
The effect on the long term heat storage for heating and cooling in consideration of the thermal energy cycle between heating and cooling has been evaluated from the experimental and analytical points of view.
Two kinds of experiments for ground source heat pumps (G.H.P.) with burried vertical pipes and horizontal pipes have been conducted. It is found that the ground source heat pumps (G.H.P.) are effective to energy conservation and long term heat storage for domestic heating.
As for vertical type G.H.P., the double U type tubes is beneficial and have large amount of heat storage and extraction rates through the soil. The cold thermal energy stored in the soil during winter by G.H.P.can be used as a heat source to cool rooms efficiently in summer.
As for G.H.P.with horizontal tubes, it has good efficiency of heat extracting rate compared with vertical tubes. The theoretical analysis is proposed to solve the interfering heat transfer with the vertical multi-tube systems using convolution law of line source theory. We can get the reasonable heat storage rate and energy saving of any kinds of configuration.
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