Journal
GEOTHERMICS
Volume 38, Issue 2, Pages 263-270Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.geothermics.2009.01.003
Keywords
Geothermal; Borehole heat exchangers; Heat transfer; Thermal response test; Ground-coupled heat pumps
Categories
Funding
- Spanish Government [ENE2008-00599/CON]
- Government of Valencia [GV/2007/232]
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A solution to the three-dimensional finite line-source (FLS) model for borehole heat exchangers (BHEs) that takes into account the prevailing geothermal gradient and allows arbitrary ground surface temperature changes is presented. Analytical expressions for the average ground temperature are derived by integrating the exact solution over the line-source depth. A self-consistent procedure to evaluate the in situ thermal response test (TRT) data is outlined. The effective thermal conductivity and the effective borehole thermal resistance can be determined by fitting the TRT data to the time-series expansion obtained for the average temperature. (C) 2009 Elsevier Ltd. All rights reserved.
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