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International Journal of Environmental Science and Technology, vol.19, no.11, pp.10737-10746, 2022 (SCI-Expanded)
In this work, R134a and its alternatives refrigerant (R513A and R1234yf) have been experimentally investigated in a heat pump system. The exergy and environmental analyzes of refrigerants were performed for the heat pump. The new methods such as exergoenvironmental and exergoenviroeconomic were used to perform environmental analysis of the heat pump. No study was found in the literature on the application of these methods to heat pump systems using R134a, R513A and R1234yf. Therefore, this study is different from those that have already been carried out and will make an important contribution to the literature. When used R134a R513A, and R1234yf the exergy destruction of components of the heat pump is similar and comparable. The most exergy destruction for all refrigerants was seen in the compressor. At − 10 °C evaporator temperature, the exergy efficiency of R513A and R1234yf is 5.83% and 11.48% and higher than R134a, respectively. The exergy efficiency of R513A and R1234yf is 8.38% and 2.72% and higher than R134a, respectively, at − 5 °C evaporator temperature. The exergy efficiency of R513A and R1234yf is lower than R134a at 0 °C evaporator temperatures. At 0 °C evaporator temperature, the exergy efficiency of R513A and R1234yf is 9.69% and 2.28% and lower than R134a, respectively. So, according to the results of exergy (thermodynamics second law) analysis, R1234yf and R513A refrigerants which have low global warming potential rates are being used as a substitute to R134a, especially at low evaporator temperatures.