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Study on heat transfer model of capillary exchanger in subway source heat pump system

Author

Listed:
  • Liu, Guodan
  • Li, Chuanrui
  • Hu, Songtao
  • Ji, Yongming
  • Tong, Zhen
  • Wang, Yimei
  • Tong, Li
  • Mao, Zhu
  • Lu, Shan

Abstract

In order to solve the problem of heat build-up in subway tunnels, a subway heat pump system with capillary network as front-end heat exchanger is proposed. A one-dimensional simplified plate heat transfer calculation method for capillary heat exchanger (CHE) based on surface-heat-source is proposed. Taking into consideration of the changing heat flux during heat transfer, this paper adopts step load, superposition principle, energy conservation and iterative method to establish the heat transfer model of CHE. CHE heat transfer tests were carried out at the Zhiquan Road Station of Qingdao Metro R2 line to prove this model. The results show that the max error of the model is 8.79%. In addition, the impact of such factors as inlet water temperature of CHE, the lining thermal conductivity, the thermal conductivity of surrounding rock and thermal diffusivity of the surrounding rock to the performance of the heat exchanger has been analyzed.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:renene:v:150:y:2020:i:c:p:1074-1088
    DOI: 10.1016/j.renene.2019.10.112
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    Cited by:

    1. Ji, Yongming & Shen, Shouheng & Wang, Xinru & Zhang, Hui & Qi, Haoyu & Hu, Songtao, 2024. "Impact of groundwater seepage on thermal performance of capillary heat exchangers in subway tunnel lining," Renewable Energy, Elsevier, vol. 227(C).
    2. Yu, Yanzhe & You, Shijun & Zhang, Huan & Ye, Tianzhen & Wang, Yaran & Wei, Shen, 2021. "A review on available energy saving strategies for heating, ventilation and air conditioning in underground metro stations," Renewable and Sustainable Energy Reviews, Elsevier, vol. 141(C).
    3. 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).
    4. Ji, Yongming & Wang, Wenqiang & Fan, Yujing & Hu, Songtao, 2023. "Coupling effect between tunnel lining heat exchanger and subway thermal environment," Renewable Energy, Elsevier, vol. 217(C).
    5. Wang, Jing & Mao, Jinfeng & Han, Xu & Li, Yong, 2021. "Study on analytical solution model of heat transfer of ground heat exchanger in the protection engineering structure," Renewable Energy, Elsevier, vol. 179(C), pages 998-1008.
    6. Ji, Yongming & Yin, Zhenfeng & Jiao, Jiachen & Hu, Songtao, 2023. "Long-term performance of a subway source heat pump system with two types of front-end heat exchangers," Renewable Energy, Elsevier, vol. 210(C), pages 640-655.
    7. 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).

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