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Influences on the thermal efficiency of energy piles

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  • Cecinato, Francesco
  • Loveridge, Fleur A.

Abstract

Energy piles have recently emerged as a viable alternative to borehole heat exchangers, but their energy efficiency has so far seen little research. In this work, a finite element numerical model is developed for the accurate 3D analysis of transient diffusive and convective heat exchange phenomena taking place in geothermal structures. The model is validated by reproducing both the outcome of a thermal response test carried out on a test pile, and the average response of the linear heat source analytical solution. Then, the model is employed to carry out a parametric analysis to identify the key factors in maximising the pile energy efficiency. It is shown that the most influential design parameter is the number of pipes, which can be more conveniently increased, within a reasonable range, compared to increasing the pile dimensions. The influence of changing pile length, concrete conductivity, pile diameter and concrete cover are also discussed in light of their energetic implications. Counter to engineering intuition, the fluid flowrate does not emerge as important in energy efficiency, provided it is sufficient to ensure turbulent flow. The model presented in this paper can be easily adapted to the detailed study of other types of geothermal structures.

Suggested Citation

  • Cecinato, Francesco & Loveridge, Fleur A., 2015. "Influences on the thermal efficiency of energy piles," Energy, Elsevier, vol. 82(C), pages 1021-1033.
    • Handle: RePEc:eee:energy:v:82:y:2015:i:c:p:1021-1033
    DOI: 10.1016/j.energy.2015.02.001
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    References listed on IDEAS

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    1. Fan, Rui & Jiang, Yiqiang & Yao, Yang & Ma, Zuiliang, 2008. "Theoretical study on the performance of an integrated ground-source heat pump system in a whole year," Energy, Elsevier, vol. 33(11), pages 1671-1679.
    2. Gao, Jun & Zhang, Xu & Liu, Jun & Li, Kuishan & Yang, Jie, 2008. "Numerical and experimental assessment of thermal performance of vertical energy piles: An application," Applied Energy, Elsevier, vol. 85(10), pages 901-910, October.
    3. Rees, S. W. & Adjali, M. H. & Zhou, Z. & Davies, M. & Thomas, H. R., 2000. "Ground heat transfer effects on the thermal performance of earth-contact structures," Renewable and Sustainable Energy Reviews, Elsevier, vol. 4(3), pages 213-265, September.
    4. Zanchini, Enzo & Lazzari, Stefano & Priarone, Antonella, 2012. "Long-term performance of large borehole heat exchanger fields with unbalanced seasonal loads and groundwater flow," Energy, Elsevier, vol. 38(1), pages 66-77.
    5. Wood, Christopher J. & Liu, Hao & Riffat, Saffa B., 2010. "An investigation of the heat pump performance and ground temperature of a piled foundation heat exchanger system for a residential building," Energy, Elsevier, vol. 35(12), pages 4932-4940.
    6. Loveridge, Fleur & Powrie, William, 2013. "Temperature response functions (G-functions) for single pile heat exchangers," Energy, Elsevier, vol. 57(C), pages 554-564.
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