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Analysis of Hydrogen Leakage and Diffusion in Onboard Hydrogen Supply Systems Within Confined Spaces
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Yongtao ZHANG1, Haiyu GAO2, Xin ZHANG1, Haohua YAN1
Chinese Journal of Automotive Engineering | 2024, 14(4) : 687 - 695
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Chinese Journal of Automotive Engineering | 2024, 14(4): 687-695
• Technology and Research •
Analysis of Hydrogen Leakage and Diffusion in Onboard Hydrogen Supply Systems Within Confined Spaces
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Yongtao ZHANG1, Haiyu GAO2, Xin ZHANG1, Haohua YAN1
Affiliations
  • 1 School of Mechanical and Electronic Control Engineering Beijing Jiaotong University Beijing 100044 China
  • 2 School of Automotive and Traffic Engineering Jiangsu University Zhenjiang 212013 China
doi: 10.3969/j.issn.2095–1469.2024.04.12
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To address the potential safety risks caused by hydrogen leakage from the onboard hydrogen system in confined spaces, a hydrogen leakage diffusion simulation study was carried out on a hydrogen fuel cell semitrailer tractor in a confined space using fluent software. The results show that, using the backward hydrogen leakage data as a baseline, the hydrogen concentration near the vent increases by an average of 42.38% after upward leakage and by 99.89% after forward leakage. Taking the hydrogen concentration data at a leak rate of 10 g/s as a benchmark, the hydrogen concentration near the vent increases by an average of 4.68% at a leak rate of 20 g/s and 127.73% at a leak rate of 90 g/s. Under certain conditions, increasing the vent area can reduce the hydrogen concentration in the confined space, but it is far less effective than using forced ventilation near the vent. After a prolonged period of hydrogen leakage, the hydrogen distribution throughout the confined space gradually reaches equilibrium. Therefore, hydrogen leakage should be promptly and effectively restricted.

hydrogen  /  leakage  /  numerical methods  /  trucks  /  confined space
Yongtao ZHANG, Haiyu GAO, Xin ZHANG, Haohua YAN. Analysis of Hydrogen Leakage and Diffusion in Onboard Hydrogen Supply Systems Within Confined Spaces[J]. Chinese Journal of Automotive Engineering, 2024 , 14 (4) : 687 -695 . DOI: 10.3969/j.issn.2095–1469.2024.04.12
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doi: 10.3969/j.issn.2095–1469.2024.04.12
  • Receive Date：2023-12-14
  • Online Date：2025-07-20
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  • Received：2023-12-14
  • Revised：2024-01-24
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Affiliations
    1 School of Mechanical and Electronic Control Engineering Beijing Jiaotong University Beijing 100044 China
    2 School of Automotive and Traffic Engineering Jiangsu University Zhenjiang 212013 China
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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