CIESC Journal ›› 2018, Vol. 69 ›› Issue (S2): 26-30.doi: 10.11949/j.issn.0438-1157.20181163

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Performance analysis of a novel compressor-ejector cycle with two-stage evaporation

LIANG Xingyu, LIU Hongxin, CAO Xiang, SHAO Liangliang, ZHANG Chunlu   

  1. Institute of Refrigeration and Cryogenics Engineering, School of Mechanical Engineering, Tongji University, Shanghai 201804, China
  • Received:2018-10-08 Revised:2018-10-13
  • Supported by:

    supported by the National Natural Science Foundation of China (51676140).

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Abstract:

Ejector cycle and two-stage evaporation cycle are two different ways to improve coefficient of performance (COP) for vapor-compression refrigeration or heat pump systems. They decrease the irreversible losses in throttling and heat transfer process, respectively. To further improve COP, a novel compressor-ejector cycle with two-stage evaporation is proposed. In this cycle, an ejector is applied to lift the lower evaporating pressure by recovering the expansion work. A thermodynamic model is developed to analyze performance of the new cycle. Numerical results indicate that COP of the new cycle under basic operating conditions is 20.4%, 10.9%, 7.6% higher than basic refrigeration cycle, ejector cycle and two-stage evaporation cycle, respectively. The improvement of COP is applicable to different refrigerants.

CLC Number: 

  • TB65

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