A REVIEW ON ALTERNATIVE REFRIGERANT FOR VCR SYSTEM

Mechanical Engineering

Refrigeration is a process of removing heat from an enclosed space or from a substance for the purpose of lowering the temperature. The substance use for that purpose is called refrigerant.The most commonly used refrigeration system among all refrigeration system is vapour compression refrigeration system. For most of the states the problems of forming and maintaining the earth’s ozone layer & minimize global warming at the planetary level via the greenhouse effect, represents a major priority. So, According to Montreal and Kyoto protocols R12 is already phase out. R134a is the most commonly used refrigerant in the domestic refrigeration due to its excellent thermodynamic properties. But because of its high global warming potential, it will phase out in the recent years. So it is time to introduce new refrigerant which have low global warming potential for the domestic refrigerators. Performance of VCR system can be improved by using proper refrigerant. Environmentally preferred refrigerants have low or zero ODP, relatively short atmospheric lifetimes, low GWP, ability to provide good system efficiency, appropriate safety properties. This paper presents a review on recent development of possible substitutes for non-ecological refrigerants because the use of ecological refrigerants plays a crucial role for reducing the environmental impacts of the halogenated refrigerants to protect the environment.

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