为研究不同车型燃料电池汽车的氢泄漏扩散,选取上汽大通FCV90和EUNIQ7两种燃料电池汽车车型,改变车辆停放位置,分析其在半封闭车库发生氢气泄漏后的扩散规律。通过数值模拟发现EUNIQ7发生泄漏后,氢气易在车辆底部聚集,而FCV90发生氢气泄漏后,氢气沿车辆底部向外扩散较快,形成氢气易燃区面积较小,说明燃料电池汽车底盘较高时,氢气泄漏扩散快,逃逸能力强。通过在车库墙壁设置监测点,发现靠近车尾监测到氢气所需时间远小于车库顶部,所以燃料电池汽车停车库内还需在侧墙下方合理布置探测器,进而缩短燃料电池汽车氢泄漏监测时间,有效避免氢泄漏事故。
Abstract
In order to study the effect of different vehicle types on hydrogen leakage and diffusion in fuel cell vehicles,two types of fuel cell vehicles, FCV90 and EUNIQ7 produced by SAIC MAXUS are selected and their parking positions are changed, the diffusion law of hydrogen in semi-enclosed garage is analyzed. Through numerical simulation, it is found that hydrogen tends to accumulate at the bottom of the vehicle after EUNIQ7 leaks, while the hydrogen diffuses rapidly along the bottom of the vehicle after FCV90 leaks, resulting in a smaller flammable area of hydrogen. It indicates that when the fuel cell vehicle chassis is high, the hydrogen leakage diffuses quickly and the escape ability is strong. By setting monitoring points on the garage walls, it is found that the time required to detect the hydrogen concentration on the wall near the rear of the vehicle is much less than the time required on the top of the garage, therefore, it is necessary to resonably arrange hydrogen concentration detectors on the side walls in the garage, so as to reduce the time of hydrogen leakage monitoring and effectively avoid hydrogen leakage accidents.
关键词
燃料电池 /
氢气 /
泄漏 /
数值模拟 /
扩散 /
临测点
Key words
fuel cells /
hydrogen /
leakage /
numerical simulation /
dispersion /
monitoring points
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参考文献
[1] 黄腾. 大型地下车库内氢气泄漏与扩散研究[D]. 济南: 山东大学, 2021.
HUANG T.Study of hydrogen leakage and dispersion in a large underground parking garage[D]. Ji’nan: Shandong University, 2021.
[2] SUZUKI J, TAMURA Y, WATANABE S, et al.Fire safety evaluation of a vehicle equipped with hydrogen fuel cylinders: comparison with gasoline and CNG vehicles[C]//SAE Technical Paper Series, petroit, USA, 2006.
[3] TAMURA Y, TAKABAYASHI M, TAKEUCHI M.The spread of fire from adjoining vehicles to a hydrogen fuel cell vehicle[J]. International journal of hydrogen energy, 2014, 39(11): 6169-6175.
[4] MAEDA Y, TAKAHASHI M, TAMURA Y, et al.Test of vehicle ignition due to hydrogen gas leakage[C]//SAE Technical Paper Series, Petroit, USA, 2006.
[5] 刘延雷, 郑津洋, 徐平, 等. 环境温度对高压储氢罐泄漏扩散影响的数值模拟[J]. 工程热物理学报, 2008, 29(5): 770-772.
LIU Y L, ZHENG J Y, XU P, et al.Numerical simulation on the influence of environment temperature on the leakage and diffusion of high pressured hydrogen due to storage tank failure[J]. Journal of engineering thermophysics, 2008, 29(5): 770-772.
[6] 李志勇, 潘相敏, 罗义英, 等. 氢能基础设施安全距离确定方法的比较与分析[J]. 太阳能学报, 2013, 34(8): 1492-1498.
LI Z Y, PAN X M, LUO Y Y, et al.Comparison of determination approaches of safety distances for hydrogen infrastructure[J]. Acta energiae solaris sinica, 2013, 34(8): 1492-1498.
[7] LAN H, WANG G Y, ZHAO K, et al.Review on the hydrogen dispersion and the burning behavior of fuel cell electric vehicles[J]. Energies, 2022, 15(19): 7295.
[8] 冯文, 王淑娟, 倪维斗, 等. 氢能的安全性和燃料电池汽车的氢安全问题[J]. 太阳能学报, 2003, 24(5): 677-682.
FENG W, WANG S J, NI W D, et al.The safety of hydrogen energy and fuel cell vehicles[J]. Acta energiae solaris sinica, 2003, 24(5): 677-682.
[9] SHEN Y H, ZHENG T, LV H, et al.Numerical simulation of hydrogen leakage from fuel cell vehicle in an outdoor parking garage[J]. World electric vehicle journal, 2021, 12(3): 118.
[10] MATSUURA K, NAKANO M, ISHIMOTO J.Sensing-based risk mitigation control of hydrogen dispersion and accumulation in a partially open space with low-height openings by forced ventilation[J]. International journal of hydrogen energy, 2012, 37(2): 1972-1984.
[11] SHU Z Y, LIANG W Q, ZHENG X H, et al.Dispersion characteristics of hydrogen leakage: comparing the prediction model with the experiment[J]. Energy, 2021, 236: 121420.
[12] CHOI J, HUR N, KANG S, et al.A CFD simulation of hydrogen dispersion for the hydrogen leakage from a fuel cell vehicle in an underground parking garage[J]. International journal of hydrogen energy, 2013, 38(19): 8084-8091.
[13] HOU X L, LAN H, ZHAO Z M, et al.Effect of obstacle location on hydrogen dispersion in a hydrogen fuel cell bus with natural and mechanical ventilation[J]. Process safety and environmental protection, 2023, 171: 995-1008.
[14] 焦明宇. 燃料电池卡车供氢系统氢气泄漏扩散仿真分析研究[D]. 北京: 北京交通大学, 2021.
JIAO M Y.Research on simulation analysis of hydrogen leakage and diffusion in hydrogen supply system of fuel cell truck[D]. Beijing: Beijing Jiaotong University, 2021.
[15] 余亚波, 邓亚东. 燃料电池客车高压舱氢气泄漏扩散[J]. 浙江大学学报(工学版), 2020, 54(2): 381-388.
YU Y B, DENG Y D.Hydrogen leakage and diffusion of high voltage cabin of fuel cell bus[J]. Journal of Zhejiang University (engineering science), 2020, 54(2): 381-388.
基金
国家重点研发计划项目（2021YFB4001005）
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