An overview of the results of 61 in-situ thermal response tests in the UK

Banks, D. , Withers, J. G., Cashmore, G. and Dimelow, C. (2013) An overview of the results of 61 in-situ thermal response tests in the UK. Quarterly Journal of Engineering Geology and Hydrogeology, 46(3), pp. 281-291. (doi:10.1144/qjegh2013-017)

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Abstract

The results of 61 in-situ UK thermal response tests, derived from three commercial test-rigs, have been analysed. Derived values of thermal conductivity yield a median of 2.25 W m K-1, with 25% and 75%-iles of 1.86 and 3.0 W m K-1. The lowest individual values are derived from Northern Irish basalt (1.1 W m K-1) and from Mesozoic / Tertiary argillites (often in the range 1.43 to 2 W m K-1), while the highest (>5 W m K-1) are from Sherwood Sandstone and Coal Measures strata where advective heat transport with groundwater flow may have led to an elevated apparent conductivity. Borehole thermal resistance exhibits 25%-ile, median and 75%-ile values of 0.09, 0.11 and 0.14 K m W-1 and correlates with borehole heat exchanger diameter and configuration. Undisturbed ground temperature exhibits 25%-ile, median and 75%-ile values of 11.7, 12.3 and 13.2°C and exhibits a latitude-dependence.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Banks, Mr David
Authors: Banks, D., Withers, J. G., Cashmore, G., and Dimelow, C.
Subjects:Q Science > QC Physics
Q Science > QE Geology
T Technology > TD Environmental technology. Sanitary engineering
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Quarterly Journal of Engineering Geology and Hydrogeology
Publisher:Geological Society
ISSN:1470-9236
ISSN (Online):2041-4803

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