Parametric analysis on multi-stage high pressure reducing valve for hydrogen decompression |
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| Affiliation: | 1. Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing, 100084, China;2. Institute of Process Equipment, College of Energy Engineering, Zhejiang University, Hangzhou, 310027, China;1. Institute of Process Equipment, Zhejiang University, Hangzhou 310027, PR China;2. Hangzhou Worldwides Valve Co., Ltd., Hangzhou 311122, PR China;3. School of Management, Zhejiang University, Hangzhou 310027, PR China;1. Division of World Class University (WCU) Multiscale Mechanical Design, Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 08826, South Korea;2. Department of Mechanical and Aerospace Engineering, Seoul National University, Seoul 08826, South Korea;3. BK21 Plus Transformative Training Program for Creative Mechanical and Aerospace Engineers, Seoul 08826, South Korea;4. Fuel Cell Vehicle Team 1, Eco-Technology Center, Hyundai-Kia Motors, Gyeonggi 446-912, South Korea;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. Ford Motor Company, Dearborn, MI, 48121, USA;2. Ford-Werke GmbH, Aachen, 52072, Germany;1. Institute of Process Equipment, College of Energy Engineering, Zhejiang University, Hangzhou 310027, PR China;2. Department of Energy Sciences, Lund University, P.O. Box 118, SE-22100 Lund, Sweden;3. State Key Lab of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, PR China |
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| Abstract: | Hydrogen fuel cell electric vehicle (FCEV) can reduce air pollution as well as achieve efficient use of hydrogen energy. Farther travel distance requires larger hydrogen storage pressure, thereby imposing more demanding working conditions on the pressure reducing system. In this paper, a multi-stage high pressure reducing valve (MSHPRV) for hydrogen decompression in FCEV is proposed, and the effects of different structural parameters on its internal flow characteristics are investigated to achieve a better hydrogen decompression process. Results show that compared with perforated plate, multi-stage perforated sleeves and valve core hold the dominant position in hydrogen throttling process. Larger multi-stage perforated sleeve diameter, perforated plate diameter and pressure ratio relate to larger hydrogen kinetic energy, turbulence vortex and energy consumption. However, with the increase of perforated plate stage and perforated plate radius, the turbulent intensity and energy consumption inside MSHPRV decreases correspondingly. This study can provide some technical supports for achieving hydrogen decompression in FCEV when facing harsh working conditions, or help with dealing energy conversion during decompression process. |
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| Keywords: | Multi-stage high pressure reducing valve Structural parameters Fuel cell electric vehicle Hydrogen decompression Computational fluid dynamics |
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