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A case study of the sizing and optimisation of an energy pile foundation (Rosborg, Denmark)

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  • Alberdi-Pagola, Maria
  • Poulsen, Søren Erbs
  • Jensen, Rasmus Lund
  • Madsen, Søren

Abstract

This paper applies previously validated multiple pile g-functions, for estimating operational average fluid temperatures in an actual energy pile foundation in Rosborg, Denmark. We find that the multiple pile g-functions yield fluid temperatures similar to what is observed, at minimal computational cost. The temperature model is then utilised in an optimisation algorithm that yields the minimum number of energy piles required by simultaneously maximising the pile spacing and taking into consideration the thermal load of the building. The optimisation shows that the thermal needs of the building can be fully supplied by 148 rearranged energy piles, instead of the current 219. The optimisation tool is also applied to a full-factorial design sweep which shows a large sensitivity of the number of energy piles on the thermal conductivity of the ground.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:renene:v:147:y:2020:i:p2:p:2724-2735
    DOI: 10.1016/j.renene.2018.07.100
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    References listed on IDEAS

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    1. Gao, Jiajia & Li, Anbang & Xu, Xinhua & Gang, Wenjie & Yan, Tian, 2018. "Ground heat exchangers: Applications, technology integration and potentials for zero energy buildings," Renewable Energy, Elsevier, vol. 128(PA), pages 337-349.
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    5. Zanchini, E. & Lazzari, S., 2013. "Temperature distribution in a field of long Borehole Heat Exchangers (BHEs) subjected to a monthly averaged heat flux," Energy, Elsevier, vol. 59(C), pages 570-580.
    6. Loveridge, Fleur & Powrie, William, 2014. "G-Functions for multiple interacting pile heat exchangers," Energy, Elsevier, vol. 64(C), pages 747-757.
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    Citations

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    Cited by:

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    3. Cunha, R.P. & Bourne-Webb, P.J., 2022. "A critical review on the current knowledge of geothermal energy piles to sustainably climatize buildings," Renewable and Sustainable Energy Reviews, Elsevier, vol. 158(C).
    4. Ma, Qijie & Wang, Peijun & Fan, Jianhua & Klar, Assaf, 2022. "Underground solar energy storage via energy piles: An experimental study," Applied Energy, Elsevier, vol. 306(PB).
    5. Ma, Qijie & Fan, Jianhua & Liu, Hantao, 2023. "Energy pile-based ground source heat pump system with seasonal solar energy storage," Renewable Energy, Elsevier, vol. 206(C), pages 1132-1146.
    6. Li, Renrong & Kong, Gangqiang & Sun, Guangchao & Zhou, Yang & Yang, Qing, 2021. "Thermomechanical characteristics of an energy pile-raft foundation under heating operations," Renewable Energy, Elsevier, vol. 175(C), pages 580-592.

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