期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 7, 页码 5537-5547出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.11.036
关键词
Flammable gas cloud (FGC); Hydrogen mass fraction (HMF); Wind velocity; Hydrogen refueling station
资金
- National Natural Science Foundation of China [51805470]
- Science and Technology Department of Zhejiang Province [2019C01025, 2020C01156]
- Youth Funds of the State Key Laboratory of Fluid Power and Mechatronic Systems (Zhejiang University) [SKLoFP-QN-1801]
This study investigates hydrogen diffusion in different wind conditions, finding that constant wind velocity and variable wind velocity have different effects on hydrogen diffusion. Variable wind velocity may lead to a more dangerous situation with a larger flammable gas cloud volume. Additionally, wind conditions have a significant impact on the distribution of hydrogen mass fraction along the radial direction.
Ambient condition, especially the wind condition, is an important factor to determine the behavior of hydrogen diffusion during hydrogen release. However, only few studies aim at the quantitative study of the hydrogen diffusion in a wind-exist condition. And very little researches aiming at the variable wind condition have been done. In this paper, the hydrogen diffusion in different wind condition which including the constant wind velocity and the variable wind velocity is investigated numerically. When considering the variable wind velocity, the UDF (user defined function) is compiled. Characteristics of the FGC (flammable gas cloud) and the HMF (hydrogen mass fraction) are analyzed in different wind condition and comparisons are made with the no-wind condition. Results indicate that the constant wind velocity and the variable wind velocity have totally different effect for the determination of hydrogen diffusion. Comparisons between the constant wind velocity and the variable wind velocity indicate that the variable wind velocity may cause a more dangerous situation since there has a larger FGC volume. More importantly, the wind condition has a non-negligible effect when considering the HMF along the radial direction. As the wind velocity increases, the distribution of the HMF along the radial direction is not Gaussian anymore when the distance between the release hole and the observation line exceeds to a critical value. This work can be a supplement of the research on the hydrogen release and diffusion and a valuable reference for the researchers. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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