ANALYSIS OF CHARACTERISTICS OF REFRIGERANTS R134a, R404A, R600a FOR SUB-COOLING REFRIGERATION SYSTEM

Abstract

Today, the most commonly used refrigerants for refrigeration systems such as refrigerators, freezers – coolers and car air conditioners are refrigerants such as R600a, R404A and R134a. In this content, we mainly calculate and analyze the characteristics of the above refrigerants used in the refrigeration system when there is sub-cooling, calculate and compare the sub-cooling coeffcient COP, specifc cooling capacity q_sub, and cooling capacity, consumed when there is sub-cooling. Specifcally, when the sub-cooling degree increases, the COP coeffcient of the three media increases, the specifc cooling capacity increases but the work does not change. When the sub-cooling level increases to 20°C, the R404A refrigerant increases the fastest, with an average increase of 1.48%. From this result, we see the effectiveness when we sub-cooling the refrigeration system.