Thermal performance analysis of fin-and-tube heat exchanger circuit in supercritical hydrogen refrigeration cycle system |
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| Affiliation: | 1. School of Aeronautics, Northwest Polytechnical University, Xi''an, Shaanxi 710072, China;2. School of Engineering, Newcastle University, Newcastle, NE1 7RU, UK;1. Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control, School of Mechanical Engineering, Tianjin University of Technology, Tianjin 300384, China;2. National Demonstration Center for Experimental Mechanical and Electrical Engineering Education, Tianjin University of Technology, Tianjin 300384, China;3. Guangdong Key Laboratory of Intelligent Transportation System, School of Intelligent Systems Engineering, Sun Yat-sen University, Guangzhou 510275, China;4. School of Engineering, University of Dayton, Dayton 45469, USA;5. College of Transportation, Jilin University, Changchun 130025, China;1. College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China;2. Shandong Shida Oilfield Technical Services CO., LTD., Dongying, 257000, China;3. Jiangsu Gas Storage Branch Company of Huabei Petroleum Administration, Changzhou, 213000, China;4. Exploration and Development Institute of PetroChina Huabei Oilfied Company, Renqiu, 062550, China;1. Clean Energy Processes (CEP) Laboratory, Department of Chemical Engineering, Imperial College London, London SW7 2AZ, United Kingdom;2. Universitat Politécnica de Catalunya, Jordi Girona 1-3, Barcelona 08034, Spain |
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| Abstract: | A circuit arrangement model for air-to-refrigerant fin-and-tube heat exchanger with supercritical hydrogen as the refrigerant is developed. The mass, momentum and energy balance equations in the circuit arrangement model are solved by the effectiveness-NTC method. The effects of gravity force, flow state and inhibit heat conduction on the heat transfer in the supercritical hydrogen refrigerant heat exchanger are investigated. Results show that the flow arrangement placed at a location where the fluid flows from the high place to the low one can achieve a better heat heat transfer performance. The form of counter-flow has a better heat transfer performance compared to that of parallel-flow. The heat transfer performance in the six-in-three-out arrangement is the better compared to that of three-in-three-out arrangement. Thus, the structure of the six-in-three-out with counter-flow from high to low one is recommend to achieve a better heat transfer performance in the supercritical hydrogen refrigerant heat exchanger. |
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| Keywords: | Heat transfer Circuit arrangement mode Supercritical hydrogen refrigerant Optimized flow path |
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