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Comparing the thermal performance of horizontal slinky-loop and vertical slinky-loop heat exchangers

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  • C.S.A. Chong
  • G. Gan
  • A. Verhoef
  • R.G. Garcia

Abstract

The heat pump market in the UK has grown rapidly over the last few years. Performance analyses of vertical ground-loop heat exchanger configurations have been widely carried out using both numerical modelling and experiments. However, research findings and design recommendations on horizontal slinky-loop and vertical slinky-loop heat exchangers are far fewer compared with those for vertical ground-loop heat exchanger configurations, especially where the long-term operation of the systems is concerned. The paper presents the results obtained from a numerical simulation for the horizontal slinky-loop and vertical slinky-loop heat exchangers of a ground-source heat pump system. A three-dimensional numerical heat transfer model was developed to study the thermal performance of various heat exchanger configurations. The influence of the loop pitch (loop spacing) and the depth of a vertical slinky-loop installation were investigated and the thermal performance and excavation work required for the horizontal and vertical slinky-loop heat exchangers were compared. The influence of the installation depth for vertical slinky-loop configurations was also investigated. The results of this study show that the influence of the installation depth of the vertical slinky-loop heat exchanger on the thermal performance of the system is small. The maximum difference in the thermal performance between the vertical and horizontal slinky-loop heat exchangers with the same loop diameter and loop pitch is less than 5%.

Suggested Citation

  • C.S.A. Chong & G. Gan & A. Verhoef & R.G. Garcia, 2014. "Comparing the thermal performance of horizontal slinky-loop and vertical slinky-loop heat exchangers," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 9(4), pages 250-255.
    • Handle: RePEc:oup:ijlctc:v:9:y:2014:i:4:p:250-255.
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    File URL: http://hdl.handle.net/10.1093/ijlct/ctt001
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    Cited by:

    1. Makasis, Nikolas & Gu, Xiaoying & Kreitmair, Monika J. & Narsilio, Guillermo A. & Choudhary, Ruchi, 2023. "Geothermal pavements: A city-scale investigation on providing sustainable heating for the city of Cardiff, UK," Renewable Energy, Elsevier, vol. 218(C).
    2. Daehoon Kim & Seokhoon Oh, 2018. "Optimizing the Design of a Vertical Ground Heat Exchanger: Measurement of the Thermal Properties of Bentonite-Based Grout and Numerical Analysis," Sustainability, MDPI, vol. 10(8), pages 1-15, July.

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