小型燃料电池客车中氢气泄漏位置和泄漏流量对其扩散的影响

Pub Date : 2022-11-27 DOI:10.1002/fuce.202200087
Xiaolu Zhang PhD, Xinwei Wang BSc, Qiubo Wang BSc, Peijin Yu BSc, Yang Miao PhD, Xulei Hou BSc, Ziming Zhao BSc, Yuejuan Li PhD
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引用次数: 0

摘要

关于氢气泄漏的研究主要集中在泄漏位置和几何构型对氢气在不同空间中分布的影响上。在这项研究中,开发了一个简化模型来检查泄漏到带座椅的小型燃料电池公交车中的氢气的扩散。研究了泄漏位置和泄漏流速对长方体通风空间(尺寸为L x W x H=5 m×2 m×2米)中氢气扩散的影响,并特别关注了天花板拐角附近的氢气浓度。结果表明,随着泄漏流速的增加,顶部的峰值平均浓度增加。然而,可燃氢空气混合物从出现到消失的持续时间随着泄漏流量的增加而减少。这项研究强调了泄漏位置的重要性,并表明氢气在水平方向上的扩散速度更快。所提出的方法有助于改进储氢罐的布置设计,以消除随后发生的事故或将事故期间的有害影响降至最低。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The effect of hydrogen leakage positions and leak flow rate on its dispersion in a small fuel cell bus

Studies on hydrogen leakage mainly have focused on the influences of the leakage locations and geometrical configurations on the distribution of hydrogen in various spaces. In this study, a simplified model was developed to examine the diffusion of the hydrogen leaked into a small fuel cell bus with seats. The impact of leakage positions and leak flow rate on the dispersion of hydrogen in a cuboid ventilation space (with dimensions L x W x H = 5 m × 2 m × 2 m) was investigated, and concentrations of hydrogen in the vicinity of the corner at the ceiling were of particular interest. It was shown the peak average concentration at the ceiling increased with increasing the leak flow rate. However, the duration from the appearance to the disappearance of the combustible hydrogen-air mixture decreased with the increase of the leak flow rate. This study highlights the importance of leakage positions and demonstrates that the dispersion of hydrogen is faster for leakage in the horizontal direction. The proposed approach is useful for improving the design of the arrangement of hydrogen storage tanks to eliminate consequent accidents or minimize the harmful impacts during an accident.

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