A numerical study of hydrogen leakage and diffusion in a hydrogen refueling station |
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| Affiliation: | 1. Institute of Process Equipment, College of Energy Engineering, Zhejiang University, Hangzhou, 310027, PR China;2. State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, PR China;1. Institute of Thermal Science and Technology, Shandong University, Jinan, 250061, China;2. Key Laboratory of Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing, 100084, China;1. School of Civil Engineering, Hefei University of Technology, Hefei, Anhui 230009, China;2. Anhui International Joint Research Center on Hydrogen Safety, Hefei, 230009, China;3. Shanghai Fire Research Institute of MEM, 601 South Zhongshan 2nd Road, Shanghai, 200032, China;1. LR01ES07 Laboratory of Energetics and Thermal and Mass Transfer (LETTM), University of Tunis El Manar, Faculty of Sciences of Tunis, Campus Universitaire 1060 Tunis, Tunisia;2. CNRS, IUSTI, Aix Marseille University, 6595, Technopole Chateau Gombert, Marseille, France;3. Department of Mathematics and Sciences, Faculty of Humanities and Sciences, Prince Sultan University, Riyadh, Saudi Arabia;1. Laboratoire d'' Energétique et des Transferts Thermique et Massique (LETTM), Faculté des Sciences de Tunis, Campus Universitaire 1060, Tunis, Tunisia;2. Institut Universitaire des Systèmes Thermiques Industriels, URM CNRS 6595, Technopole Château Gombert, Marseille, France;3. Université Libre de Tunis, Institut Polytechnique Privé (IP2), 30 Av. Khereddine Pacha 1002, Tunis, Tunisia;1. College of Safety Science and Engineering, Nanjing Tech University, Nanjing, Jiangsu, 210009, China;2. Department of Information Technology, Nanjing Forest Police College, Nanjing, 210046, China;3. Department of Fire Protection Engineering, University of Maryland, College Park, MD, 20742, United States;4. School of Civil Engineering, Central South University, Changsha, 410075, China;1. Faculty of Materials and Manufacturing, Beijing University of Technology, China;2. Engineering Research Center of Advanced Manufacturing Technology for Automotive Components, Ministry of Education, Beijing University of Technology, China;3. China Nuclear Power Technology Research Institute Co., Ltd, Shenzhen, China |
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| Abstract: | Studies focused on the behavior of the hydrogen leakage and diffusion are of great importance for facilitating the large scale application of the hydrogen energy. In this paper, the hydrogen leakage and diffusion in six scenarios which including comparison of different leakage position and different wind effect are analyzed numerically. The studied geometry is derived from the hydrogen refueling station in China. Due to the high pressure in hydrogen storage take, the hydrogen leakage is momentum dominated. The hydrogen volume concentration with the variation of the leakage time in different scenarios is plotted. More importantly, profiles of the flammable gas cloud at the end of the leakage are quantitatively studied. Results indicate that a more narrow space between the leakage hole and the obstacle and a smaller contact area with the obstacle make the profile of the flammable gas cloud more irregular and unpredictable. In addition, results highlight the wind effect on the hydrogen leakage and diffusion. Comparing with scenario which the wind direction consistent with the leakage direction, the opposite wind direction may result in a larger profile of the flammable gas cloud. With wind velocity increasing, the profile of the flammable gas cloud is confined in a smaller range. However, the presence of the wind facilitates the form of the recirculation zone near the obstacle. With an increase of the wind velocity, the recirculation zone moves downward along the obstacle. Thus, the hydrogen accumulation is more prominent near the obstacle. |
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| Keywords: | Flammable gas cloud Leakage position Wind velocity Hydrogen refueling station |
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