Impactos de parâmetros operacionais no COP de um ciclo de refrigeração simples com R-290

Abstract

The transfer of thermal energy from a low-temperature environment to a high-temperature environment, through devices that operate in refrigeration cycles, has wide application in the industrial and commercial segments, both to provide thermal comfort and to preserve perishable products. This study analyses the influence on the performance coefficient of the refrigeration cycle running with R 290 (propane) of operational parameters, such as condensation temperature, evaporation temperature, superheating, subcooling, pressure variations in the condenser, evaporator, line suction, liquid line and discharge line, in addition to the isentropic efficiency of the compressor. The simulations were carried out using the CoolPack software, varying the operational parameters with specific values. The results obtained revealed that the evaporation temperature, the condensation temperature, the pressure variation in the suction line and the isentropic efficiency have a significant influence on the performance coefficient of the refrigeration cycle, with average standard deviations greater than 10%.