Evaluation of The Use R450A as an Alternative to R134a in Low and Medium Temperature Heat Pump Systems: 4-E (Energy, Exergy, Environmental and Enviro-Economic) Analysis

This investigation presents a theoretical evaluation of the use R450A replace to R134a in low and medium temperature heat pump systems. The energy, exergy, environmental enviro-economic analyzes pumps have been performed for two refrigerants (R134a its alternative R450A). thermodynamic analyses made source temperatures (10 oC 20 oC) six sink (from 30 55 oC). It has observed that R450A's mass flow rate is lower than R134a. Because density suction line Although heating capacity more R450A, reason why similar COP value with compressor energy consumption Exergy destruction occurred mostly under all operating conditions both refrigerants. At temperatures, minimum exergy occurs expansion valve, as evaporator at high temperatures. results show behaves similarly In conclusion, refrigerant can be used according environmental-economic analysis results.