Thermodynamic analysis of CO2 blends with R41 as an azeotropy refrigerant applied in small refrigerated cabinet and heat pump water heater

Abstract

In this study, blend of CO2 with R41 is evaluated for application in three different systems including a refrigerated cabinet, an air-source heat pump water heater and a water-source heat pump water heater. The effects of CO2/R41 mixture as an azeotropy refrigerant on system performance are analyzed under various working conditions. The results show that CO2/R41 mixture may be a good choice to substitute for pure CO2 in the studied systems because of its stable chemical properties, low optimal high pressure, high system COP, low compression ratio, low discharge temperature, high refrigerating capacity per unit, and high heating capacity per unit. Furthermore, the exergy efficiencies of the three studied systems are improved to more than 23% with the proposed CO2/R41 (0.5/0.5) mixture refrigerant.