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Cooling load analysis based on theory-based models and field tests for VAC system in subway station: A case study

Author

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  • Wang, Jiewei
  • Yin, Yusheng
  • Wei, Ziqing
  • Zhai, Xiaoqiang

Abstract

Ventilation and air-conditioning (VAC) systems in subway stations provide comfort to passengers. Meanwhile, they are also major energy-consuming systems, which provide a significant energy-saving potential. However, there is a lack of detailed research on the cooling load of VAC systems in subway stations. In this study, a framework for evaluating the cooling load of VAC systems was established based on actual operation data and field tests from a subway station in Shanghai, China. The framework decoupled cooling load into passengers, unorganized ventilation, devices and mechanical ventilation, etc. Based on the framework, the dynamic characteristics of different cooling loads of the VAC system were collected. The results showed that the mechanical fresh air caused the largest cooling load, accounting for 31.52 % of the total cooling load. Furthermore, several energy-saving methods were proposed to improve the energy efficiency of the VAC system. The framework serves as an effective method to evaluate the cooling load and provide guidance for practical energy-saving retrofit projects for VAC systems in subway stations.

Suggested Citation

  • Wang, Jiewei & Yin, Yusheng & Wei, Ziqing & Zhai, Xiaoqiang, 2025. "Cooling load analysis based on theory-based models and field tests for VAC system in subway station: A case study," Energy, Elsevier, vol. 314(C).
    • Handle: RePEc:eee:energy:v:314:y:2025:i:c:s0360544224039975
    DOI: 10.1016/j.energy.2024.134219
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