Research on the Dynamic Leaking and Diffusion Law of Hydrogen-Blended Natural Gas under the Soil–Atmosphere Coupled Model

Shuai Ren, Jingyi Huang, Jiuqing Ban, Jiyong Long, Xin Wang and Gang Liu ()
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Shuai Ren: PipeChina Southwest Pipeline Company, Chengdu 610094, China
Jingyi Huang: College of Safety Science and Engineering, Chongqing University of Science & Technology, Chongqing 401331, China
Jiuqing Ban: Research Institute of Natural Gas Technology, PetroChina Southwest Oil and Gas Field Company, Chengdu 610213, China
Jiyong Long: Branch Company in Northeast of Sichuan Province, PetroChina Southwest Oil and Gas Field Company, Chengdu 610000, China
Xin Wang: College of Safety Science and Engineering, Chongqing University of Science & Technology, Chongqing 401331, China
Gang Liu: College of Safety Science and Engineering, Chongqing University of Science & Technology, Chongqing 401331, China

Energies, 2024, vol. 17, issue 20, 1-21

Abstract: With the breakthrough in mixing hydrogen into natural gas pipelines for urban use, the widespread application of hydrogen-blended natural gas (HBNG) in energy delivery is imminent. However, this development also introduces significant safety concerns due to notable disparities in the physical and chemical properties between methane and hydrogen, heightening the risks associated with gas leaks. Current models that simulate the diffusion of leaked HBNG from buried pipelines into the atmosphere often employ fixed average leakage rates, which do not accurately represent the dynamic nature of gas leakage and diffusion. This study uses computational fluid dynamics (CFD) 2024R1 software to build a three-dimensional simulation model under a soil–atmosphere coupling model for HBNG leakage and diffusion. The findings reveal that, in the soil–atmosphere coupling model, the gas diffusion range under a fixed leakage rate is smaller than that under a dynamic leakage rate. Under the same influencing factors in calm wind conditions, the gas primarily diffuses in the vertical direction, whereas under the same influencing factors in windy conditions, the gas mainly diffuses in the horizontal direction.

Keywords: hydrogen-doped natural gas; porous media; coupled model; influencing factors; dangerous areas (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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