Abstract
In this study, the performance of different refrigerants (with low GWP value) depending on thermophysical properties in the cooling system was evaluated. The cooling capacities of R134a, R445a, R515a, R456a, ND, and R516a refrigerants used in the cooling system are determined per unit refrigerant. If the compressor speed values and the volumetric efficiency of the compressor are constant, the results of the effects of the refrigerants in the cooling system are compared with each other. When the system is operated with R445a, the highest COP value is obtained when the volumetric efficiency value is 0.7. The R515a provided the closest COP value to R134a when the compressor speed was 1750 rpm and the 98% coefficient of performance value was similar. When the refrigerants considered are evaluated together, it was determined that R445a provides the best values according to R134a and has an average cooling capacity of approximately 12% is higher.
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