Performance Analysis of VCR Cycle with R290a and R600a at Different Mass Fraction

With the ozone layer depletion problem and the use of refrigerant which contribute to global warming it is necessary to find alternate refrigerant which is environment friendly and also does not have any effect on global warming and ozone -layer depletion. In this analysis the performance of vapor compression cycle evaluated theoretically with d ifferent refrigerant and at different mass fraction. In vapor compression refrigerat ion system, the commonly used refrigerant is R134a Tetra -fluoroethane (C2H2F4) and here we are using R290a Propane (C3H8) and R600a Isobutane (C4H10) for evaluating various parameter separately and also at different mass fraction about 25%-75%, 50%-50% and 75%-25% respectively and also at different outside condition by varying outside temperature. The evaluation was made in term of various performance parameters such as volumetric efficiency, compressor discharge temperature, condenser temperature, pressure ratio, cooling capacity and coefficient of performance. The result obtained are compared with in itial used R134a Tetra-fluoroethane and other used refrigerant i.e . R290a propane and R600a Isobutene.