Numerical study on particle distribution characteristics of slush hydrogen in a cryogenic tank |
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| Affiliation: | 1. Institute of Refrigeration and Cryogenic Engineering, Xi''an Jiaotong University, Xi''an, 710049, China;2. State Key Laboratory of Technologies in Space Cryogenic Propellants, Beijing, 100028, China;1. Environmental Health Research Center, Golestan University of Medical Sciences, Golestan, Iran;2. Department of Environmental Health Engineering, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran;3. Environmental and Occupational Hazards Control Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran;4. Department of Environmental Health Engineering, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran;5. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran;6. Health and Environment Research Center, Ilam University of Medical Sciences, Ilam, Iran;7. Department of Environmental Health Engineering, School of Public Health, Ilam University of Medical Sciences, Ilam, Iran;1. School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;2. Xuzhou Huatsing Jingkun Energy Co., Ltd., Xuzhou 221005, China;3. College of Energy, Soochow University, Suzhou 215006, China;4. Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China;1. School of Resources, Environment and Safety Engineering, University of South China, Hengyang, Hunan Province 421001, China;2. School of Electrical Engineering, University of South China, Hengyang, Hunan Province 421001, China;3. Hangzhou Yanqu Information Technology Co., Ltd, Hangzhou 310003, China;1. Institute of Refrigeration and Cryogenic Engineering, Xi''an Jiaotong University, Xi''an 710049, China;2. China Special Equipment Inspection and Research Institute, Beijing, 100029, China;3. College of Petroleum and Chemical, Lanzhou University of Technology, Lanzhou, 730050, China |
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| Abstract: | A numerical model considering phase change and heat transfer was established by the Euler-Euler two-fluid method to investigate the storage characteristics and two-phase flow field of slush hydrogen. Numerous numerical simulations were performed to discuss the effect of particle diameter (dp = 0.02–0.5 mm), content of solid hydrogen (αs = 10%–50%), and heat leakage (q = 50–200W·m−2) on the flow field. It was found that particle deposition could occur during the storage process, and there exist moving vortices with contrary directions under specific conditions. The sedimentation characteristics and vortex size are influenced by many factors including particle size, solid hydrogen content, and heat leakage. An increase in particle size could lead to the strengthening of precipitation and the expansion of the counterclockwise vortex region on the right side of the tank. And the increase in solid hydrogen content could result in more deposition and more collisions and friction between particles. Moreover, the increase in heat leakage could increase the area of the counterclockwise vortex. Numerical results of the deposition and flow field characteristics in the storage tank could clearly show the physical law of the slush hydrogen so that the uniform distribution of slush hydrogen could be promoted for efficient storage and application. |
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| Keywords: | Slush hydrogen Flow field characteristic Cryogenic tank Euler-euler two-fluid method Moving vortices |
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