Journal of South China University of Technology(Natural Science) >

2024 , Vol. 52 >Issue 2: 84 - 94

DOI: https://doi.org/10.12141/j.issn.1000-565X.220422

Energy, Power & Electrical Engineering

Study on Hydrogen Leakage-Explosion and Risk of Hydrogen Bus in Station

  • CHEN Guohua ,
  • XIE Mulin ,
  • ZHANG Qiang ,
  • LI Geliang
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  • 1.School of Mechanical and Automotive Engineering，South China University of Technology，Guangzhou 510640，Guangdong，China
    2.Guangdong Provincial Science and Technology Collaborative Innovation Center for Work Safety，Guangzhou 510640，Guangdong，China
陈国华（1967-），男，教授，博士生导师，主要从事工业安全与风险评价技术、过程装备安全可靠性及风险评价技术研究。E-mail：mmghchen@scut.edu.cn

Received date: 2022-07-04

  Online published: 2022-11-28

Supported by

the Key Areas R&D Program of Guangdong Province(2020B0404020004)

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Abstract

Hydrogen vehicles have developed rapidly in recent years. Compared with hydrogen cars, hydrogen buses have greater safety risks due to their large sizes and large passenger capacity, so it’s of great significance to study the hydrogen leakage-explosion accidents and risks of hydrogen buses in station. The study predicted the dispersion of hydrogen under different leakage conditions after the failure of critical components of hydrogen bus with software FLACS. It studied the overpressure characteristics of the explosion after the explosion induced by the vapor cloud under different ignition locations according to the volume concentration distribution characteristics of hydrogen. And it analyzed the impact range of the accident, quantified the consequences of the explosion accident, and put forward the explosion risk prevention and control suggestions. Based on the risk analysis of hydrogen leakage in the parking lot, it put forward a risk analysis method of hydrogen leakage and explosions.The results show that the environmental wind and the planning layout of the station will affect the hydrogen dispersion after leakage. When the environmental wind direction is perpendicular to the length of the parking lot ceiling, it is most conducive to the dispersion of hydrogen; the dispersed velocity after the hydrogen leakage in the large sides station is fast; the hydrogen volume concentration decreases rapidly; the overpressure generated by ignition induced gas cloud explosion is less powerful; the maximum overpressure in the most severe leakage scenario is approximately 12.38 kPa. The high sensitivity hydrogen sensors can be installed near the TPRD device of hydrogen bus and at the corresponding ceiling position in the middle of the parking space to improve the sensitivity of real-time monitoring of hydrogen leakage.The risk of gas cloud explosion accident after hydrogen leakage in the parking lot is approximately 3.64×10-7 times per year, which is lower than the risk acceptable level, indicating the bus parking lot meets the safety requirements. The research results provides reasonable suggestions for the layout of hydrogen sensors in hydrogen buses and station, as well as the planning and construction of station.

Key words： hydrogen bus; hydrogen leakage; gas explosion; risk assessment

Cite this article

CHEN Guohua , XIE Mulin , ZHANG Qiang , LI Geliang . Study on Hydrogen Leakage-Explosion and Risk of Hydrogen Bus in Station[J]. Journal of South China University of Technology(Natural Science), 2024 , 52(2) : 84 -94 . DOI: 10.12141/j.issn.1000-565X.220422

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