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Research on Heat Exchange Law and Structural Design Optimization of Deep Buried Pipe Energy Piles

Author

Listed:
  • Zhi Chen

    (Department of Road and Bridge Engineering, School of Civil Engineering, Hubei University of Technology, Wuhan 430068, China)

  • Bo Wang

    (Department of Road and Bridge Engineering, School of Civil Engineering, Hubei University of Technology, Wuhan 430068, China)

  • Lifei Zheng

    (Institute of Geotechnical Engineering, School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Henglin Xiao

    (Department of Road and Bridge Engineering, School of Civil Engineering, Hubei University of Technology, Wuhan 430068, China)

  • Jingquan Wang

    (Department of Road and Bridge Engineering, School of Civil Engineering, Hubei University of Technology, Wuhan 430068, China)

Abstract

A deeply buried pipe energy pile (DBP-EP) combines the advantages of a ground source heat pump (GSHP) and an inside buried pipe energy pile (IBP-EP) and is an efficient, clean, and energy-saving technology. Based on field tests and numerical simulations, this paper explores the temperature distribution and heat exchange effects of DBP-EP under different influencing factors. The results show that when the pile-to-well ratio is approximately 0.3–0.4, the heat exchange of the energy pile obtains the best benefit; the inlet water temperature is the most significant factor affecting the heat exchange effect of the energy pile, and when combined with a reasonable pile-to-well ratio, the energy pile obtains the best heat exchange effect; the flow rate has a significant impact on the heat exchange effect of the energy pile, but needs to be set reasonably according to the pile-to-well ratio; the influence of inlet water temperature, well depth, flow rate, and pile length on the heat exchange efficiency of the energy pile is gradually weakened. The research results of this paper provide a theoretical basis for the structural design optimization of DBP-EP and promote the popularization and application of energy pile technology.

Suggested Citation

  • Zhi Chen & Bo Wang & Lifei Zheng & Henglin Xiao & Jingquan Wang, 2021. "Research on Heat Exchange Law and Structural Design Optimization of Deep Buried Pipe Energy Piles," Energies, MDPI, vol. 14(20), pages 1-19, October.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:20:p:6449-:d:652286
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    References listed on IDEAS

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    1. Cui, Ping & Jia, Linrui & Zhou, Xinlei & Yang, Wenxiao & Zhang, Wenke, 2020. "Heat transfer analysis of energy piles with parallel U-Tubes," Renewable Energy, Elsevier, vol. 161(C), pages 1046-1058.
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    3. 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.
    4. Weidong Lyu & Hefu Pu & Jiannan (Nick) Chen, 2020. "Thermal Performance of an Energy Pile Group with a Deeply Penetrating U-Shaped Heat Exchanger," Energies, MDPI, vol. 13(21), pages 1-17, November.
    5. Sani, Abubakar Kawuwa & Singh, Rao Martand, 2020. "Response of unsaturated soils to heating of geothermal energy pile," Renewable Energy, Elsevier, vol. 147(P2), pages 2618-2632.
    6. Park, Hyunku & Lee, Seung-Rae & Yoon, Seok & Choi, Jung-Chan, 2013. "Evaluation of thermal response and performance of PHC energy pile: Field experiments and numerical simulation," Applied Energy, Elsevier, vol. 103(C), pages 12-24.
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    Cited by:

    1. Jingquan Wang & Chunxia Chang & Zhi Chen & Henglin Xiao & Bo Wang & Jinjia Tan & Di Hai, 2022. "Study on the Thermomechanical Response of Deep Buried Pipe Energy Piles under Temperature Load," Energies, MDPI, vol. 15(10), pages 1-16, May.

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