Experimental study on thermal resistance of vertical ground heat exchangers

Hiroaki Okubo, Hikari Fujii, Ryuichi Itoi

研究成果: 著書/レポートタイプへの貢献会議での発言

4 引用 (Scopus)

抄録

Thermal resistance values in ground heat exchangers (GHEs) were evaluated using the results of six thermal response tests (TRTs) with two methods. In the first method, Kelvin's line source theory is applied on the temperature performance in TRT results. In the second method, the thermal resistance is calculated on the basis of well completion information. Thermal resistance values estimated from the two methods showed good agreements. Then, the thermal resistances of various well completion types were compared, using the second method. Thermal resistance increased in the order of co-axial GHE, double U-tubes, and single U-tube. As grouting materials, silica sand was the most effective in reducing thermal resistance. The evaluation result also showed that a borehole without grouting could minimize thermal resistance, when natural convection exists in the GHE.

元の言語英語
ホスト出版物のタイトルGeothermal Resources Council Transactions - GRC 2006 Annual Meeting
ホスト出版物のサブタイトルGeothermal Resources-Securing Our Energy Future
ページ559-564
ページ数6
出版物ステータス出版済み - 12 1 2006
イベントGRC 2006 Annual Meeting: Geothermal Resources-Securing Our Energy Future - San Diego, CA, 米国
継続期間: 9 10 20069 13 2006

出版物シリーズ

名前Transactions - Geothermal Resources Council
30 II
ISSN(印刷物)0193-5933

その他

その他GRC 2006 Annual Meeting: Geothermal Resources-Securing Our Energy Future
米国
San Diego, CA
期間9/10/069/13/06

Fingerprint

Heat resistance
Heat exchangers
experimental study
well completion
grouting
Well completion
Grouting
Silica sand
borehole
silica
convection
method
Boreholes
Natural convection
sand
temperature
test

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Geophysics

これを引用

Okubo, H., Fujii, H., & Itoi, R. (2006). Experimental study on thermal resistance of vertical ground heat exchangers. : Geothermal Resources Council Transactions - GRC 2006 Annual Meeting: Geothermal Resources-Securing Our Energy Future (pp. 559-564). (Transactions - Geothermal Resources Council; 巻数 30 II).

Experimental study on thermal resistance of vertical ground heat exchangers. / Okubo, Hiroaki; Fujii, Hikari; Itoi, Ryuichi.

Geothermal Resources Council Transactions - GRC 2006 Annual Meeting: Geothermal Resources-Securing Our Energy Future. 2006. p. 559-564 (Transactions - Geothermal Resources Council; 巻 30 II).

研究成果: 著書/レポートタイプへの貢献会議での発言

Okubo, H, Fujii, H & Itoi, R 2006, Experimental study on thermal resistance of vertical ground heat exchangers. : Geothermal Resources Council Transactions - GRC 2006 Annual Meeting: Geothermal Resources-Securing Our Energy Future. Transactions - Geothermal Resources Council, 巻. 30 II, pp. 559-564, GRC 2006 Annual Meeting: Geothermal Resources-Securing Our Energy Future, San Diego, CA, 米国, 9/10/06.
Okubo H, Fujii H, Itoi R. Experimental study on thermal resistance of vertical ground heat exchangers. : Geothermal Resources Council Transactions - GRC 2006 Annual Meeting: Geothermal Resources-Securing Our Energy Future. 2006. p. 559-564. (Transactions - Geothermal Resources Council).
Okubo, Hiroaki ; Fujii, Hikari ; Itoi, Ryuichi. / Experimental study on thermal resistance of vertical ground heat exchangers. Geothermal Resources Council Transactions - GRC 2006 Annual Meeting: Geothermal Resources-Securing Our Energy Future. 2006. pp. 559-564 (Transactions - Geothermal Resources Council).
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