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Optimization of the rate of exergy output of a multi-stage endoreversible combined refrigeration system |
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| Affiliation: | 1. Institute of Thermal Science and Power Engineering, Wuhan Institute of Technology, Wuhan 430205, China;2. School of Mechanical & Electrical Engineering, Wuhan Institute of Technology, Wuhan 430205, China;3. School of Power Engineering, Naval University of Engineering, Wuhan 430033, China;1. Institute for Energy Studies, College of Engineering Guindy, Anna University, Chennai 600025, Tamilnadu, India;2. Department of Mechanical Engineering, Saipem India Projects Ltd, Chennai 600034, India;1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China;2. State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300350, China |
| Abstract: | A general endoreversible refrigeration cycle model which includes the irreversibility of heat transfer across finite temperature differences and the heat leak loss between the external heat reservoirs is used to analyze the rate of exergy output of a multi-stage combined refrigeration system. The relations between the rates of exergy output and refrigeration and between the rate of exergy output and coefficient of performance are derived. The efficiency of exergy output is calculated. The optimal problems relative to the rate of exergy output are discussed. Some characteristic curves of the refrigeration system are presented. The results obtained here are suitable for an arbitrary-stage endoreversible combined refrigeration system. |
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