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NUMERICAL SIMULATION OF THE PERFORMANCE OF A CAPILLARY THERMAL DRIVEN EJECTOR REFRIGERATOR

M. H. Shi
Department of Power Engineering, Southeast University, Nanjing, 210096, China

H. Cai
Department of Power Engineering, Southeast University, Nanjing, 210096, China

X. C. Wang
Department of Power Engineering, Southeast University, Nanjing, 210096, China

Abstract

Capillary driven ejector refrigerator is a new refrigeration system, which can use solar energy and other low-grade heat sources. In this paper the performance of the refrigeration system is simulated numerically. The flow and heat transfer characteristics in a solar collector, generator, ejector, condenser and evaporator are analyzed and calculated. The results show that when the generating temperature is higher than 75−80 °C and the environmental temperature is lower than 35 °C, the system can work normally; the coefficient of performance of this refrigeration system is in the range of 0.05−0.15 by use of water as a refrigerant. The cooling capacity and COP increase with increasing generative temperature and decreasing condensing pressure.

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