PERFORMANCE ANALYSIS OF VAPOUR COMPRESSION REFRIGERATION SYSTEM USING R134A, HC MIXTURE AND R401A AS WORKING MEDIUM

The performance of heat transfer is one of the most important research areas in the field of thermal engineering. There are a large number of refrigerants, which are used to transfer heat from low temperature reservoir to high temperature reservoir by using vapour compression refrigeration system. There are various obstacles faced in working of different refrigerants due to their environmental impact (R11, R12), toxicity (NH 3), flammability (HC) and high pressure (CO 2); which makes them more hazardous than other working fluids according to safety and environmental issues. Here experimental study is conducted to observe the performance of different environmental friendly refrigerant mixtures (HC mixture and R401a). It is also observed the effect of working parameters like diameter of capillary tube, working pressures and inlet water temperatures, which affect the coefficient of performance (COP) of vapour compression refrigeration system. It is observed that R134a is more efficient than HC mixture and R401a, but there is less mass quantity of HC mixture and R401a is required in the same system. So there is less effect in environment due to more mass of R134a.