Experimentation on the sub-cooling, superheating effect, and performance of a low-cost refrigeration system using R1270 as a refrigerant

Abstract

R1270, also known as CARE 45, is refrigerant grade propylene (propene), a natural, or "not in kind", refrigerant suitable for use in low and medium temperature refrigeration applications. It is non-toxic, with zero ODP (Ozone Depletion Potential) and very low GWP (Global Warming Potential). This paper researches the effect of a test examination completed to decide the exhibition of local icebox when a melted oil gas (LPG) is locally accessible. The performance of a standard VCRS cycle can be obtained by varying evaporator and condensing temperatures over the required range. The effects of evaporator and condensing temperatures on specific and volumic refrigeration effects of a standard VCRS cycle. As shown in the figure, for a given condenser temperature as evaporator temperature increases the specific refrigeration effect increases marginally. It can be seen that for a given evaporator temperature, the refrigeration effect decreases as condenser temperature increases. These trends can be explained easily with the help of the P-h diagram. It can also be observed that the volumetric refrigeration effect increases rapidly with evaporator temperature due to the increase in specific refrigeration effect and decrease in specific volume of refrigerant vapour at the inlet to the compressor. Volumetric refrigeration effect increases marginally as condenser temperature decreases.