Soil corrosion and hydrogen embrittlement are the main factors of hydrogen pipeline failure. The gas escapes, diffuses and accumulates in the soil and enters the atmosphere when leak occurs. The mechanism of gas diffusion in buried pipelines is very complicated. Mastering the evolution law of hydrogen leakage diffusion is conducive to quickly locating the leakage point and reducing the loss. The leakage model of the underground hydrogen pipeline is established in this paper. The effect of leakage hole, soil type, pipeline pressure, pipeline diameter on hydrogen leakage diffusion were investigated. The results show that when the hydrogen pipeline leaks, the hydrogen concentration increases with the increase of leakage time, showing a symmetrical distribution trend. With the pipeline pressure increase, hydrogen leakage speed is accelerated, and longitudinal diffusion gradually becomes the dominant direction. As the leakage diameter increases, hydrogen leakage per unit of time increases sharply. Hydrogen diffuses more easily in sandy soil, and its diffusion speed, concentration, and range are higher than that in clay soil. The research content provides a reference and basis for the detection and evaluation of buried hydrogen pipeline leakage.
Declaration of competing interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Acknowledgements
This research work was supported National Natural Science Foundation of China: (582104223).
| [1] |
G. Pluvinage, Mechanical properties of a wide range of pipe steels under influence of pure hydrogen or hydrogen blended with natural gas, Int. J. Pres. Ves. Pip. 190 (2021) 104293.
|
| [2] |
Xiaobo Shen, Xuening Zhang, Haifeng Liu, Research and progress of safety issues related to high pressure hydrogen leakage, CIESC J. 72 (3) (2021) 1217-1229.
|
| [3] |
H. Li, X. Cao, Y. Liu, et al., Safety of hydrogen storage and transportation: an overview on mechanisms, techniques, and challenges, Energy Rep. 8 (2022) 6258-6269.
|
| [4] |
Dandan Shen, Dingyun Gao, Xiangmin Pan, Literature review on safety of hydrogen energy utilization, Shanghai Energy Conserv. (11) (2020) 1236-1246.
|
| [5] |
B.E. Lebrouhi, J.J. Djoupo, B. Lamrani, et al., Global hydrogen development -A technological and geopolitical overview, Int. J. Hydrogen Energy 47 (11) (2022) 7016-7048.
|
| [6] |
Yawen Wang, Yanwei Chen, Huiping Zhao, et al., Research on characteristics of liquid hydrogen leakage diffusion and protection methods based on CFD, J. Ordnance Equip. Eng. 42 (6) (2021) 140-146.
|
| [7] |
Z. Shu, G. Lei, Z. Liu, et al., Motion trajectory prediction model of hydrogen leak and diffusion in a stable thermally-stratified environment, Int. J. Hydrogen Energy 47 (3) (2022) 2040-2049.
|
| [8] |
X. Mao, R. Ying, Y. Yuan, et al., Simulation and analysis of hydrogen leakage and explosion behaviors in various compartments on a hydrogen fuel cell ship, Int. J. Hydrogen Energy 46 (9) (2021) 6857-6872.
|
| [9] |
J. Choi, N. Hur, S. Kang, et al., A CFD simulation of hydrogen dispersion for the hydrogen leakage from a fuel cell vehicle in an underground parking garage, Int. J. Hydrogen Energy 38 (19) (2013) 8084-8091.
|
| [10] |
Feng Li, Yupeng Yuan, Xinping Yan, et al., A study on numerical simulation of hydrogen leakage in cabin of fuel cell ship, J. Transp. Inf. Saf. 35 (6) (2017) 60-66.
|
| [11] |
Weiyang Yan, Xuhai Pan, Zhilei Wang, et al., Experimental investigation on spontaneous combustion of high-pressure hydrogen leakage to form jet fire, Explos. Shock Waves 39 (11) (2019) 134-143.
|
| [12] |
Yujie Lin, Xiaodong Ling, Xue Jiang, et al., Research status of fuel cell vehicles hydrogen leakage and explosion under confined space, Saf. Health Environ. 39 (11) (2019) 134-143.
|
| [13] |
B. Fuster, S. Jallais, et al., Guidelines and recommendations for indoor use of fuel cells and hydrogen systems, Int. J. Hydrogen Energy 42 (11) (2017) 7600-7607.
|
| [14] |
Jinyang Zheng, Ziliang Liu, Zhengli Hua, et al., Research status-in-situ and key challenges in hydrogen safety, J. Saf. Environ. 20 (1) (2020) 106-115.
|
| [15] |
Yuxia Xiang, Leakage and diffusion model and test research of high pressure underexpanded hydrogen, Taiyuan University of Technology, 2021.
|
| [16] |
Rong Xiao, Simulation study on leakage and diffusion of buried gas pipeline in soil, Harbin Institute of Technology, 2019.
|
| [17] |
Yan Wang, Hong Huang, Lida Huang, et al., Numerical simulation of leakage gas dispersion based on soil and atmosphere coupling, J. Tsinghua Univ. (Sci. Technol.) 57 (3) (2017) 274-280.
|
| [18] |
Miao Zhou, Diffusion simulation of buried gas pipeline in soil, Shandong Jianzhu University, 2018.
|
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