2022 Fiscal Year Final Research Report
Elucidation of the mechanism of low-temperature storage water in the Oya Stone Mining Site and development of technology for sustainable use of cryogenic heat
Project/Area Number |
19K12437
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 64050:Sound material-cycle social systems-related
|
Research Institution | National Institute of Advanced Industrial Science and Technology |
Principal Investigator |
Tomigashi Akira 国立研究開発法人産業技術総合研究所, エネルギー・環境領域, 研究チーム長 (00740010)
|
Co-Investigator(Kenkyū-buntansha) |
柴崎 直明 福島大学, 共生システム理工学類, 教授 (70400588)
|
Project Period (FY) |
2019-04-01 – 2023-03-31
|
Keywords | 地中熱 / 地下熱 / 未利用熱 / 地下空間 / 再生可能エネルギー / 自然エネルギー / 地球温暖化 / 産業遺構 |
Outline of Final Research Achievements |
As a result of the observation of groundwater storage in the Oya area, a significant decrease in storage water temperature was observed in the semi-submerged groundwater space. In addition, as a result of a schematic study of the heat balance at the investigation site, 98% of the total heat loss from the underground space was evaluated to be due to evaporation, and it was concluded that the influence of evaporation of the stored water cannot be ignored in the low temperature of the underground space storage water in the Oya area. Furthermore, based on the results of continuous monitoring, heat balance analysis, and interviews with operators, it was inferred that the low temperature of the underground space storage water in the Oya area is caused by the "sensible heat process," in which cooled outdoor air flows into the underground space in winter and becomes a cooling source, and the "latent heat process," in which the water temperature decreases due to evaporation of storage water.
|
Free Research Field |
地下水工学
|
Academic Significance and Societal Importance of the Research Achievements |
本研究成果より,人為的な温度管理を行わない限り,地下空間内の貯留水の温度は自然状態まで上昇する可能性が高いことが明らかとなった。したがって,貯留水の温度管理が持続可能な事業継続のために不可欠であり,適切な地下空間利用を実現するために,研究成果を反映した事業者用ガイドランを取りまとめている。
|