Study on the dynamic characteristics of the free piston in the ionic liquid compressor for hydrogen refuelling stations by the fluid-structure interaction modelling |
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| Affiliation: | 1. School of Energy and Power Engineering, Xi''an Jiaotong University, Xi''an 710049, China;2. Shandong Himile Manufacturing Co. LTD, No. 1 Haomai Road, Weifang 261500, China;3. State Key Laboratory of Multiphase Flow in Power Engineering, Xi''an Jiaotong University, Xi''an 710049, China;1. Institute of Modern Physics, Fudan University, Shanghai, 200433, China;2. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900, China;1. School of Materials Science and Engineering, Institute of New Energy Material Chemistry, Nankai University, Tianjin, 300350, PR China;2. College of Electronics Information and Optical Engineering, Nankai University, Tianjin, 300350, PR China;3. Computational Science Research Center, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea;1. Nanjing Institute of Future Energy System, Nanjing 211135, China;2. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;3. School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210042, China;4. University of Chinese Academy of Sciences, Nanjing 211135, China;5. Innovation Academy for Light-duty Gas Turbine, Chinese Academy of Sciences, Beijing 100190, China;1. Research Center for Combustion and Environment Technology, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, 200240, China;2. School of Electrical and Energy Power Engineering, Yangzhou University, Yangzhou, 225002, China;3. Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, China;1. College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China;2. Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institution, Chengdu University of Technology, Chengdu, 610059, China |
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| Abstract: | The ionic liquid compressor is promising for hydrogen refuelling stations, where the dynamic characteristics of the free piston are crucial for adjusting the compressor performance. This paper presents an investigation of the dynamic characteristics of the free piston in the ionic liquid compressor through a fluid-structure interaction modelling in three typical conditions. The results show that in the typical condition with no impact, phenomenons of buffering, oil charging, and oil overflow are observed in the oil pressure variation. Three features are found in the motion curve: asymmetric motion with a delay of reversal due to the buffering effect, variable location of the dead centre, and fluctuation in the piston velocity. When the impact occurs at the TDC, an opposite variation trend is observed in the gas and oil pressure curve. In the typical condition with impact at the BDC, the oil pressure drops below the atmospheric pressure. |
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| Keywords: | Hydrogen energy Ionic liquid compressor Free piston Fluid-structure interaction Dynamic characteristics |
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