Abstract
Vapour compression systems are associated with high energy demand and contribute to ozone depletion and global warming due to halogenated refrigerants used in them which are unfriendly to the environment. Hydrocarbon refrigerants have been proposed as a substitute to halogenated refrigerants due to their zero ozone depletion potentials, very low global warming potentials, and lower energy demand for effective operations. In this review, the terms ozone depletion and global warming are explained and the causes. Also, the use of hydrocarbon refrigerants as an ideal solution to energy security and environmental challenges accompanied by vapour compression systems are discussed. Lastly, this paper revealed that hydrocarbon refrigerants are long term replacement for halogenated refrigerants in a vapour compression system.
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