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G-Functions for multiple interacting pile heat exchangers

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  • Loveridge, Fleur
  • Powrie, William

Abstract

Pile heat exchangers – where heat transfer pipes are cast into the building piled foundations – offer an opportunity to use ground energy systems without the additional construction costs related to the provision of special purpose heat exchangers. However, analysis methods for pile heat exchangers are still under development. In particular there is an absence of available methods and guidance for the amount of thermal interaction that may occur between adjacent pile heat exchangers and the corresponding reduction in available energy that this will cause. This is of particular importance as the locations of foundation piles are controlled by the structural demands of the building and cannot be optimised with respect to the thermal analysis. This paper presents a method for deriving G-functions for use with multiple pile heat exchangers. Example functions illustrate the primary importance of pile spacing in controlling available energy, followed by the number of piles within any given arrangement. Significantly it was found that the internal thermal behaviour of a pile is not influenced appreciably by adjacent piles.

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  • Loveridge, Fleur & Powrie, William, 2014. "G-Functions for multiple interacting pile heat exchangers," Energy, Elsevier, vol. 64(C), pages 747-757.
    • Handle: RePEc:eee:energy:v:64:y:2014:i:c:p:747-757
    DOI: 10.1016/j.energy.2013.11.014
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    References listed on IDEAS

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    Cited by:

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    8. Alberdi-Pagola, Maria & Poulsen, Søren Erbs & Jensen, Rasmus Lund & Madsen, Søren, 2020. "A case study of the sizing and optimisation of an energy pile foundation (Rosborg, Denmark)," Renewable Energy, Elsevier, vol. 147(P2), pages 2724-2735.
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