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A New Approach for Characterizing Pile Heat Exchangers Using Thermal Response Tests

Author

Listed:
  • Charles Maragna

    (BRGM, F-45060 Orléans, France)

  • Fleur Loveridge

    (School of Civil Engineering, Faculty of Engineering and Physical Sciences, University of Leeds, Leeds LS2 9JT, UK)

Abstract

Pile heat exchangers offer a cost effective route to implementation of ground-source heat pump systems for many large commercial buildings compared with traditional boreholes. Such projects typically use thermal response tests to determine the key input parameters for system design, namely soil thermal conductivity and heat exchanger thermal resistance. However, this brings challenges for pile heat exchanger based systems, where in situ thermal response tests are known to be less reliable due to the large thermal capacity of the pile. This paper presents a new “black box” resistance capacitive model for applications to pile thermal response tests. The approach is tested against case study data and shown to perform well. Additional test duration savings are shown to be possible if a novel combination of borehole and pile thermal response tests is applied together to determine design parameters.

Suggested Citation

  • Charles Maragna & Fleur Loveridge, 2021. "A New Approach for Characterizing Pile Heat Exchangers Using Thermal Response Tests," Energies, MDPI, vol. 14(12), pages 1-18, June.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:12:p:3375-:d:571110
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    References listed on IDEAS

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    1. Maragna, Charles & Loveridge, Fleur, 2019. "A resistive-capacitive model of pile heat exchangers with an application to thermal response tests interpretation," Renewable Energy, Elsevier, vol. 138(C), pages 891-910.
    2. Ana Vieira & Maria Alberdi-Pagola & Paul Christodoulides & Saqib Javed & Fleur Loveridge & Frederic Nguyen & Francesco Cecinato & João Maranha & Georgios Florides & Iulia Prodan & Gust Van Lysebetten , 2017. "Characterisation of Ground Thermal and Thermo-Mechanical Behaviour for Shallow Geothermal Energy Applications," Energies, MDPI, vol. 10(12), pages 1-51, December.
    3. Alberdi-Pagola, Maria & Poulsen, Søren Erbs & Loveridge, Fleur & Madsen, Søren & Jensen, Rasmus Lund, 2018. "Comparing heat flow models for interpretation of precast quadratic pile heat exchanger thermal response tests," Energy, Elsevier, vol. 145(C), pages 721-733.
    4. Gehlin, S.E.A. & Hellström, G., 2003. "Influence on thermal response test by groundwater flow in vertical fractures in hard rock," Renewable Energy, Elsevier, vol. 28(14), pages 2221-2238.
    5. Johan Claesson & Saqib Javed, 2020. "Explicit Multipole Formula for the Local Thermal Resistance in an Energy Pile—The Line-Source Approximation," Energies, MDPI, vol. 13(20), pages 1-24, October.
    6. 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.
    7. Linden Jensen-Page & Fleur Loveridge & Guillermo A. Narsilio, 2019. "Thermal Response Testing of Large Diameter Energy Piles," Energies, MDPI, vol. 12(14), pages 1-25, July.
    8. Witte, Henk J.L., 2013. "Error analysis of thermal response tests," Applied Energy, Elsevier, vol. 109(C), pages 302-311.
    9. De Carli, Michele & Tonon, Massimo & Zarrella, Angelo & Zecchin, Roberto, 2010. "A computational capacity resistance model (CaRM) for vertical ground-coupled heat exchangers," Renewable Energy, Elsevier, vol. 35(7), pages 1537-1550.
    10. Han, Chanjuan & Yu, Xiong (Bill), 2017. "Feasibility of geothermal heat exchanger pile-based bridge deck snow melting system: A simulation based analysis," Renewable Energy, Elsevier, vol. 101(C), pages 214-224.
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    Cited by:

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