A practical method for computing the thermal properties of a Ground Heat Exchanger

Paul Christodoulides, Georgios Florides and Panayiotis Pouloupatis

Renewable Energy, 2016, vol. 94, issue C, 81-89

Abstract: The aim of this paper is to show a practical way of estimating the thermal ground properties, namely the ground thermal conductivity, and in particular the thermal diffusivity and the volumetric heat capacity in a reliable manner, for sizing Ground Heat Exchangers (GHEs). A well-known thermal model, proposed by Blackwell in 1954, is applied and is validated both in the heating mode and in the cooling mode, using a GHE as a probe. The value of the thermal conductivity can be easily determined by the model but the procedure also requires knowledge of the ground specific heat capacity and density, which are normally deduced from the (non-accurate) geological data of the site.

Keywords: Ground heat exchanger; Borehole; Thermal characteristics; Ground thermal properties; Line-source method (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:94:y:2016:i:c:p:81-89

DOI: 10.1016/j.renene.2016.03.035

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