Study and Comparative Analysis of Selection of Eco-Friendly Refrigerants and Possible Refrigerants by Mixing Them : A Review

There are many kind 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 (CFC, HCFC), toxicity (NH3), flammability (HC) and high pressure (CO2) which makes them more hazardous than other working fluids according to safety and environmental issues. Keeping in mind the present scenario of climatic change and demand comfort of modern human age the researcher and inventors must have to be take a steps on all possible ways to protect/prevent or save the earth and its environment in terms of global warming effect. Refrigerants are one of the reasons which contribute the change in temperature by exchanging heat to the environment so our efforts should also be focused on the use of possible natural refrigerants replacements at lesser cost and at low potential effect on environment. As there is large no. of natural refrigerants are available with varying nature of their thermodynamic properties, chemical properties and its stability so it is possible to find better mixture of natural refrigerants by using these refrigerants at different proportion of composition to get the better heat absorbing substance at lesser cost so that the performance of VCRS system can be improved/optimized in terms of COP, other environmental hazards (ODP & GWP) and can be used for future replacement refrigerants.