Li, Chaofeng, Cleall, Peter John ![]() |
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Abstract
This paper analyzes the influence of unsaturated soil properties and groundwater flow on the performance of ground source heat pump (GSHP) systems. A mathematical model of GSHP systems, which considers the influence varying unsaturated soil thermal properties, groundwater table depth and saturated groundwater flow, is introduced and coupled to a heat pump model to consider dynamically-changing loads due to specific heat pump coefficient of performance (COP) characteristics. The model is validated against experiment results and an analytical model reported by others. Finally, numerical simulations are performed to investigate the effect of inclusion of a heat pump, moisture content variations, groundwater table fluctuations and groundwater flow rates on the performance of the GSHP system. Results show that neglecting variations in moisture content in unsaturated soil could lead to underestimating the heat transfer capacity of the soil. A rising groundwater tables is beneficial to the operation of the GSHP system. The influence of groundwater table fluctuation should be considered, otherwise could result in a maximum error of 3.78% on the outlet fluid temperature. When calculating the influence of groundwater flow rates on the performance of the GSHP system, the effect of groundwater tables should also be considered.
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Advanced Research Computing @ Cardiff (ARCCA) Engineering |
Publisher: | Elsevier |
ISSN: | 1359-4311 |
Date of First Compliant Deposit: | 1 May 2018 |
Date of Acceptance: | 30 April 2018 |
Last Modified: | 07 Nov 2023 07:13 |
URI: | https://orca.cardiff.ac.uk/id/eprint/111131 |
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