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Heat transfer performance analysis of front-end capillary heat exchanger of a subway source heat pump system

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  • Ji, Yongming
  • Wu, Wenze
  • Qi, Haoyu
  • Wang, Wenqiang
  • Hu, Songtao

Abstract

During the operation of subway systems, a significant amount of heat is stored annually in the rock surrounding the tunnel, which results in underground thermal pollution. A subway source heat pump system with a front-end capillary heat exchanger (CHE) is considered an effective technology to address this problem. However, it has not yet been employed in systematic design and operation methods. This study numerically simulates and analyses the heat transfer performance of a tunnel lining CHE for an entire year under the typical conditions of an actual project. The results are expected to provide theoretical guidance for CHE design and operation. Moreover, the proposed model was verified by comparing the simulation results with those of field experiments.

Suggested Citation

  • Ji, Yongming & Wu, Wenze & Qi, Haoyu & Wang, Wenqiang & Hu, Songtao, 2022. "Heat transfer performance analysis of front-end capillary heat exchanger of a subway source heat pump system," Energy, Elsevier, vol. 246(C).
    • Handle: RePEc:eee:energy:v:246:y:2022:i:c:s0360544222003279
    DOI: 10.1016/j.energy.2022.123424
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    References listed on IDEAS

    as
    1. Tong, Li & Liu, Nan & Hu, Songtao & Ji, Yongming & Lu, Shan & Liu, Guodan & Tong, Zhen, 2021. "Study on key design parameters of subway source heat pump system with capillary exchanger," Renewable Energy, Elsevier, vol. 164(C), pages 183-193.
    2. Mohanraj, M. & Belyayev, Ye. & Jayaraj, S. & Kaltayev, A., 2018. "Research and developments on solar assisted compression heat pump systems – A comprehensive review (Part A: Modeling and modifications)," Renewable and Sustainable Energy Reviews, Elsevier, vol. 83(C), pages 90-123.
    3. Liu, Guodan & Li, Chuanrui & Hu, Songtao & Ji, Yongming & Tong, Zhen & Wang, Yimei & Tong, Li & Mao, Zhu & Lu, Shan, 2020. "Study on heat transfer model of capillary exchanger in subway source heat pump system," Renewable Energy, Elsevier, vol. 150(C), pages 1074-1088.
    4. Mohanraj, M. & Belyayev, Ye. & Jayaraj, S. & Kaltayev, A., 2018. "Research and developments on solar assisted compression heat pump systems – A comprehensive review (Part-B: Applications)," Renewable and Sustainable Energy Reviews, Elsevier, vol. 83(C), pages 124-155.
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    Cited by:

    1. Chen, Zhaoxin & Li, Jiaxuan & Tang, Guoqiang & Zhang, Jiahao & Zhang, Donghai & Gao, Penghui, 2024. "High-efficiency heating and cooling technology with embedded pipes in buildings and underground structures: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 192(C).
    2. Ji, Yongming & Wu, Wenze & Hu, Songtao, 2023. "Long-term performance of a front-end capillary heat exchanger for a metro source heat pump system," Applied Energy, Elsevier, vol. 335(C).

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