Thermodynamic analysis of vapour compression refrigeration systems using multiple evaporators at different temperatures with compound compression, individual and compound expansion valves with flash intercoolers

In this investigation comparison and impact of environmentally friendly refrigerants (R1234yf, , R1234ze, R227ea, R134a, R236fa, R245fa and R-32) on multiple evaporators at different temperature with compound compression and flash intercooler with individual and multiple throttle valves was carried out on the basis of energetic -exergetic approach. The Numerical computation was done for both systems and a Comparison was done in terms of coefficient of performance, rational efficiency and total system defect. It was observed that for all considered refrigerants second law & first law efficiency of system-1 is higher (approximately 6.29% to 7.2%) than system-2 conversely, system defect of system-2 is higher than system-1.In terms of energetic efficiency, rational efficiency and system defect for both systems, R32 show minimum performance and performances of R123, R245fa and R236fa better with the comparison of other selected refrigerants for system-1 and system-2. The performance of HFC-134a and HFO refrigerants were compared and it was observed that the performance of HFC134a and HFO-1234ze are similar with the 1% performance differences while HFO-1234yf has slightly less around 2 to 3% lower than HFC-134a which can replace HFC-134a in near future.

This article is published in peer review journal and open access journal, International journal of research in engineering and innovation (IJREI)  which have a high impact factor journal for more details regarding this article, please go through our journal website.

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