2012 Fiscal Year Final Research Report
Heat Extraction Characteristics of Downhole Heat Exchanger with Ground-Water Flow and Phase Change
| Project/Area Number |
21560879
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Energy engineering
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| Research Institution | Akita University |
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Principal Investigator |
TAGO Makoto 秋田大学, 大学院・工学資源学研究科, 教授 (50171682)
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| Research Collaborator |
AKATA Hirotake 秋田大学, 大学院・工学資源学研究科, 技術部技術職員
SAKUDA Hikari 秋田大学, 大学院・工学資源学研究科, 当時博士前期課程学生
MORITA Satoshi 秋田大学, 大学院・工学資源学研究科, 当時博士前期課程学生
KANEKO Nobuhiro 秋田大学, 大学院・工学資源学研究科, 当時博士前期課程学生
KAMADA Shuusuke 秋田大学, 大学院・工学資源学研究科, 当時博士前期課程学生
CHIBA Taisuke 秋田大学, 大学院・工学資源学研究科, 当時博士前期課程学生
ISE Takashi 秋田大学, 大学院・工学資源学研究科, 当時博士前期課程学生
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| Project Period (FY) |
2009 – 2012
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| Keywords | エネルギー節約・効率利用 / 自然エネルギーの利用 |
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| Research Abstract |
A spiral-tube downhole heat exchanger has been proposed to make the best use of geothermal energy in shallow stratum, and the effect of ground-water flow on heat extraction characteristics with a spiral-tube downhole heat exchanger has been investigated by numerical simulation. Moreover, cooling experiments in a porous cavity have been carried out to clarify phase change phenomena such as freezing and solidification with heat extraction from magma. From the present study it was noted that the heat extraction rate increased with increasing ground-water velocity and that the freezing phenomena in a porous cavity intricately changed due to the difference of porosity.
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