Study on emergency ventilation mode for multisource fires in a typical interchange subway station

Abstract

The fire protection design in a large-scale interchange station is always a great challenge. In this paper, a series of numerical simulations were conducted to investigate the performance of emergency ventilation modes for three potential multisource fire scenarios. The parameters that influence passengers’ evacuation were analyzed. The results demonstrated that unreasonable co-operation ventilation mode enhances the smoke propagation in other lines. The interaction of ventilation modes in different lines must be considered in practice. When the multisource fires occur on the same floor of both lines, the most effective scheme is to adopt the same ventilation mode in each line. When the multisource fires occur on different floors of both lines, it is difficult to maintain a balance of the exhaust capability in each line. The optimal ventilation modes were finally proposed for three fire scenarios based on the smoke discharge capability in the whole station.

Keywords:

• Interchange subway station
• multisource fires
• emergency ventilation mode
• numerical simulation

Acknowledgements

The authors also would like to give special thanks to Shen Gansu from Shenzhen Urban Public Safety and Technology Institute (China) for his help in simulation.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (NSFC) under Grant No. 51874182.

Notes on contributors

Jipeng Wang

Jipeng Wang is a graduate student of College of Safety Science and Engineering, Nanjing Tech University (Nanjing, China). His research interest includes fire dynamics simulation and smoke control method.

Yan Wang

Yan Wang is an associate professor of Department of Public Administration, School of Law, Nanjing Tech University (Nanjing, China). Her research interests focus on urban public security management and emergency evacuation.

Fan Wu

Fan Wu is a doctoral student of school of environmental and safety engineering, Changzhou University (Changzhou, China). His research interests focus on fire modelling and the smoke control method in subway and tunnel.

Peihong Wu

Peihong Wu is a graduate student of College of Safety Science and Engineering, Nanjing Tech University (Nanjing, China). Her research focuses on emergency evacuation and fire prevention in subway stations.

Juncheng Jiang

Juncheng Jiang is a professor at the College of Safety Science and Engineering, Nanjing Tech University (Nanjing, China). His research interests focus on the prevention of fire and explosion, the inherent safer design of chemical process, and the accident analysis.