Performance Analysis of Dual-Evaporator Ejector Refrigeration System in Different Configurations: Experimental Investigation

Abstract

This study aimed to assess the effectiveness of an ejector refrigeration cycle, using a laboratory-scale experimental system operating in different configurations. The configurations included a conventional vapour compression refrigeration cycle (CVCR), as well as a dual evaporator ejector refrigeration system (DEES) operated in two modes: with a single thermal expansion valve (DEESA) and with dual thermal expansion valve (DEESB). Results showed that the use of the ejector increased the mass flow rate of the refrigerant. Moreover, DEESA demonstrated higher cooling capacity and coefficient of performance (COP) than the CVCR system, with the COP being 7 to 21% higher than that of the traditional system. DEESA also showed the highest total cooling capacity compared to other configurations. DEESB, on the other hand, resulted in lower evaporation temperatures and higher superheat values than DEESA. Based on the evaluations, it has been concluded that the ejector operates more efficiently in systems with dual evaporators, leading to positive contributions to system performance.