Modeling of Hydrogen Dispersion, Jet Fires and Explosions Caused by Hydrogen Pipeline Leakage

Author:

Lin Yujie123,Ling Xiaodong124,Yu Anfeng1234ORCID,Liu Yi123,Liu Di124,Wang Yazhen124,Wu Qian123,Lu Yuan5

Affiliation:

1. State Key Laboratory of Chemical Safety, Qingdao 266071, China

2. SINOPEC Research Institute of Safety Engineering Co., Ltd., Qingdao 266071, China

3. National Registration Center for Chemicals, Ministry of Emergency Management, Qingdao 266071, China

4. SINOPEC National Petrochemical Project Risk Assessment Technical Center Co., Ltd., Qingdao 266071, China

5. School of Safety Engineering, Changzhou University, Changzhou 213164, China

Abstract

Accidental hydrogen releases from pipelines pose significant risks, particularly with the expanding deployment of hydrogen infrastructure. Despite this, there has been a lack of thorough investigation into hydrogen leakage from pipelines, especially under complex real-world conditions. This study addresses this gap by modeling hydrogen gas dispersion, jet fires, and explosions based on practical scenarios. Various factors influencing accident consequences, such as leak hole size, wind speed, wind direction, and trench presence, were systematically examined. The findings reveal that both hydrogen dispersion distance and jet flame thermal radiation distance increase with leak hole size and wind speed. Specifically, the longest dispersion and radiation distances occur when the wind direction aligns with the trench, which is 110 m where the hydrogen concentration is 4% and 76 m where the radiation is 15.8 kW/m2 in the case of a 325 mm leak hole and wind under 10 m/s. Meanwhile, pipelines lacking trenching exhibit the shortest distances, 0.17 m and 0.98 m, at a hydrogen concentration of 4% and 15.8 kW/m2 radiation with a leak hole size of 3.25 mm and no wind. Moreover, under relatively higher wind speeds, hydrogen concentration stratification occurs. Notably, the low congestion surrounding the pipeline results in an explosion overpressure too low to cause damage; namely, the highest overpressure is 8 kPa but this lasts less than 0.2 s. This comprehensive numerical study of hydrogen pipeline leakage offers valuable quantitative insights, serving as a vital reference for facility siting and design considerations to eliminate the risk of fire incidents.

Funder

National Natural Science Foundation of China

Ministry of Science and Technology of China Petroleum and Chemical Corporation

Publisher

MDPI AG

Subject

Earth and Planetary Sciences (miscellaneous),Safety Research,Environmental Science (miscellaneous),Safety, Risk, Reliability and Quality,Building and Construction,Forestry

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. A technical review on quantitative risk analysis for hydrogen infrastructure;Journal of Loss Prevention in the Process Industries;2024-10

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