Analisis Perbandingan Penggunaan Refrigeran R-134a dan R-404A Pada Trainer Sistem Refrigerasi Dengan Kompresor ¼ PK

Abstract

Refrigeration is a vital technology in human life, used to maintain the freshness of food and drinks, as well as providing air comfort. In the refrigeration industry, selecting the right refrigerant is the main key to achieving optimal and environmentally friendly performance. The aim of this research is to find out which refrigerant is more optimal for use in refrigeration trainers with 1/4 PK compressors, taking into account performance parameters such as COP (Coefficient of Performance), cooling power (Q), electrical power (W), and evaporator temperature ( Te). The parameters used are pressure, temperature and time for 120 minutes with 10 minute intervals. The measurement results show that the final compressor inlet and outlet pressures between R-134a and R-404A are 62.05 kPa and 1461.68 kPa, 82.73 kPa and 2220.11 kPa. The evaporator temperature at the end between R-134a and R-404A is -16.3 °C and -29.3 °C. The condenser temperature between R-134a and R-404A is 54 °C and 59.8 °C. The average compressor work between R-134a and R-404A is 66,099 kJ/kg and 67,043 kJ/kg. The average heat absorption in the evaporator between R-134a and R-404A is 97.10 kJ/kg and 57.71 kJ/kg. The average COP between R-134a and R-404A is 1.42 and 0.81. The research results show that the R-134a refrigerant has a higher COP value compared to R-404A. Based on the analysis results, R-134a refrigerant is more optimal for use in refrigeration trainers with 1/4 PK compressors for applications that require high energy efficiency. Meanwhile, R-404A refrigerant is more optimal for use in applications that require high cooling capacity.