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Evaluating the applicability of the radial approximation for pile heat exchangers

Evaluating the applicability of the radial approximation for pile heat exchangers
Evaluating the applicability of the radial approximation for pile heat exchangers

This paper appraises the efficacy of using an analytical radial approximation for different thermal pile heat exchanger geometries. Unsteady radial heat-flow from fluid in a pipe set within a grouted borehole into the external ground is well-documented and can be solved analytically very rapidly using Laplace Transforms (Javed and Claesson 2011). By comparing the radial model with finite-element simulations including explicit pile geometries, this paper provides a provisional analysis of the accuracy of this approach. Initial findings suggest that the radial model may provide an appropriate approximation to pile behaviour for certain pipe configurations, albeit with small ‘mid-time’ error.

1866-8755
3-10
Springer
Woodman, Nick
9870f75a-6d12-4815-84b8-6610e657a6ad
Loveridge, F. A.
fb5b7ad9-d1b8-40d3-894b-bccedf0e8a77
Javed, Saqib
cf0a5b6e-8389-4288-bb5f-2e75487eb918
Claesson, Johan
a69ef5ff-921e-4f70-96fb-3a3eee30bd0a
Ferrari, A.
Laloui, L.
Woodman, Nick
9870f75a-6d12-4815-84b8-6610e657a6ad
Loveridge, F. A.
fb5b7ad9-d1b8-40d3-894b-bccedf0e8a77
Javed, Saqib
cf0a5b6e-8389-4288-bb5f-2e75487eb918
Claesson, Johan
a69ef5ff-921e-4f70-96fb-3a3eee30bd0a
Ferrari, A.
Laloui, L.

Woodman, Nick, Loveridge, F. A., Javed, Saqib and Claesson, Johan (2019) Evaluating the applicability of the radial approximation for pile heat exchangers. Ferrari, A. and Laloui, L. (eds.) In Energy Geotechnics: SEG 2018. Springer. pp. 3-10 . (doi:10.1007/978-3-319-99670-7_1).

Record type: Conference or Workshop Item (Paper)

Abstract

This paper appraises the efficacy of using an analytical radial approximation for different thermal pile heat exchanger geometries. Unsteady radial heat-flow from fluid in a pipe set within a grouted borehole into the external ground is well-documented and can be solved analytically very rapidly using Laplace Transforms (Javed and Claesson 2011). By comparing the radial model with finite-element simulations including explicit pile geometries, this paper provides a provisional analysis of the accuracy of this approach. Initial findings suggest that the radial model may provide an appropriate approximation to pile behaviour for certain pipe configurations, albeit with small ‘mid-time’ error.

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e-pub ahead of print date: 24 August 2018
Published date: 2019

Identifiers

Local EPrints ID: 425963
URI: http://eprints.soton.ac.uk/id/eprint/425963
ISSN: 1866-8755
PURE UUID: 9c6b0b90-12a2-4152-9c6c-39d6f8a1f105
ORCID for Nick Woodman: ORCID iD orcid.org/0000-0002-5571-0451
ORCID for F. A. Loveridge: ORCID iD orcid.org/0000-0002-6688-6305

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Date deposited: 07 Nov 2018 17:30
Last modified: 07 Oct 2020 06:39

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