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Investigation on the Effect of Platform Height on Smoke Characteristics of Fire Scenarios for Subway Stations

Author

Listed:
  • Desheng Xu

    (Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing 100124, China)

  • Yanfeng Li

    (College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China)

  • Junmei Li

    (Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing 100124, China)

  • Jin Zhang

    (Beijing Key Laboratory of Control Technology for City Toxic and Combustible Major Hazards, Beijing Municipal Institute of Labor Protection, Beijing 100054, China)

  • Jiaxin Li

    (Beijing Key Laboratory of Green Built Environment and Energy Efficient Technology, Beijing University of Technology, Beijing 100124, China)

Abstract

In this study, three full-scale experiments and a series of numerical simulations were conducted to investigate the influence of subway platform height and atrium ceiling height of subway stations on smoke control by mechanical exhausting systems. The smoke temperature variation with time, maximum temperature distribution, and smoke stratification were discussed. Results showed that the atrium had capacity to store smoke, especially at the early stage of smoke spread. However, the efficiency of smoke extraction did not increase simply with the rise in platform height and atrium ceiling height, and favorable smoke exhaust velocity was crucial for smoke elimination. The optimal smoke exhaust velocity was studied by numerical simulation and it was found that the area of smoke diffusion in subway stations with a higher platform was significantly smaller under the optimal smoke exhaust velocity. In addition, a prediction model of optimal smoke exhaust velocity with subway platform height was proposed. This study could provide on-site data and smoke spread characteristics for smoke control design, operation, and, significantly, guide safety evacuation of the exhaust system of subway stations.

Suggested Citation

  • Desheng Xu & Yanfeng Li & Junmei Li & Jin Zhang & Jiaxin Li, 2021. "Investigation on the Effect of Platform Height on Smoke Characteristics of Fire Scenarios for Subway Stations," Sustainability, MDPI, vol. 13(19), pages 1-20, September.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:19:p:10584-:d:641915
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    References listed on IDEAS

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    1. Martin Lyubomirov Ivanov & Wei Peng & Qi Wang & Wan Ki Chow, 2021. "Sustainable Smoke Extraction System for Atrium: A Numerical Study," Sustainability, MDPI, vol. 13(13), pages 1-22, July.
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    Cited by:

    1. Xu, Desheng & Li, Yanfeng & Du, Tianmei & Zhong, Hua & Huang, Youbo & Li, Lei & Xiangling, Duanmu, 2024. "Investigating the influence of outdoor temperature variations on fire-induced smoke behavior in an atrium-type underground metro station using hybrid ventilation systems," Energy, Elsevier, vol. 287(C).

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