Comparative analysis of domestic refrigeration systems using R600a and R134a refrigerants

Abstract

This article presents a comparative analysis of three no frost refrigerators same characteristics that work with refrigerant HC R600a and HFC R134a. For analyzing the measured operating temperature, also the power consumption is determined and finally the coefficient of performance (COP) for each set is calculated. The three domestic refrigerators used were the same model and capacity with the difference that a 1/4 hp compressor charged with R134a used in the first and in the other two coolers compressors used 1/4 hp and 1/6 hp charged with R600a. From this it was determined that the COP of the refrigerator with R600a and 1/4 hp compressor is 2.7 and to 1/6 hp compressor is 4.8, whereas with R134a and 1/4 hp compressor is 3.5 ; also the maximum temperatures reached on the elements of the cooling system and charged with R600a 1/6 hp compressor were -33.92 °C to the evaporator income, 60.73 °C at the outlet of the compressor, 37.53 °C to the compressor income and 36.75 °C at the condenser outlet.