Evaluation of Vapour Compression Refrigeration System Using Different Refrigerants-A Review

Abstract

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
(NH3), flammability (HC) and high pressure (CO2); which makes
them more hazardous than other working fluids according to
safety and environmental issues. Researchers observed the
performance of different environmental friendly refrigerants and
their mixtures in different proportions. They also observed the
effect of working parameters like dimensions of capillary tube,
working pressures and working temperatures, which affect the
coefficient of performance (COP) of vapour compression
refrigeration system. From the literature there seems to be need of
new efficient, minimum global warming potential (GWP),
minimum ozone depletion potential (ODP) and environmental
friendly refrigerants.