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International journal of refrigeration = Revbue internationale du froid v.74, 2017년, pp.295 - 303   SCI SCIE
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Etude expErimentale d'un systEme frigorifique biEtagE A Ejecteur alimentE par deux sources de chaleur
Experimental study on two-stage ejector refrigeration system driven by two heat sources

Chen, Guangming (Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou, China ); Zhang, Rongtao ( Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou, China ); Zhu, Daibin ( Ningbo Aux Electric Co., Ltd, Ningbo, China ); Chen, Shaojie ( Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou, China ); Fang, Lingyun ( Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou, China ); Hao, Xinyue ( Ningbo Institute of Technology, Zhejiang University, Ningbo, China );
  • 초록  

    Abstract In this paper, an experimental study on a two-stage ejector refrigeration system driven by two heat sources is carried out involving system design, setup, operation and experimental evaluation. It is looked at by means of changing temperatures of evaporation, condensation, low and high temperature generation independently for the variation tendency of system performance (including total entrainment ratio and COP) and comparison to the conventional single-stage ejector refrigeration system at variable condensation temperatures that is achieved by the valve switching in this system. In terms of refrigerants, R236fa is selected for stability of the system operation. Total entrainment ratio and COP are increasing as the temperatures of evaporation, high and low temperature generation go up. Different from the conventional single-stage ejector refrigeration system, this two-stage system is finally found to be capable of supplying more refrigerating effect in situations where the condensation temperature is lower than 21.7 °C. Highlights Two-stage ejector refrigeration system driven by two heat sources is studied. The system is designed, setup and operated for experimental results. The variable tendencies of system performance are achieved and analyzed. Comparison to the single-stage ejector refrigeration system is stated.


  • 주제어

    Ejector refrigeration system .   Two-stage .   Two heat sources .   Experimental study .   Performance .   Système frigorifique à éjecteur .   Biétagé .   Deux sources de chaleur .   Étude expérimentale .   Performance.  

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