Educational and technical publisher, 2003, Delhi. Domkundwar, Refrigeration and air conditioning, 7th edition. Tata Mc Graw Hill publishing company limited, 2003 New Delhi. Ananthnarayanan, Basic refrigeration and air conditioning, 2nd edition.
Tata Mc Graw Hill publishing company limited, 2000 New Delhi. Arora, Refrigeration and air conditioning, 2nd edition. Forbes Pearson, “New, Natural and Alternative Refrigerants”, Star refrigeration Limited, 2013 Edinburgh. Kyoto protocol, United Nations Framework Convention on Climate Change, United Nations, New York, USA, 1997. Muraleedharan, S Jayaraj, A review on recent developments in new refrigerant mixtures for vapor compression based refrigeration air conditioning and heat pump units Int. Muraleedharan, Environment friendly alternatives to halogenated refrigerants- a review, Int. Potts, A comparison of the operating performance of alternative refrigerants. New Age International publishers, 2010, New Delhi. Manohar Prasad, Refrigeration and air conditioning, 2nd edition. Dossat, Principles of refrigeration, 4th edition. Keywords:Įnvironment friendly Refrigerant, R134a, HCM. The problems with HCM refrigerants when they use as a retrofitted are also analyzed. This paper reviews the various theoretical and experimental studies carried out around the world with eco-friendly HC and HCM refrigerants, which are going to be the promising alternatives. Presently, hydrocarbon mixtures and pure hydrocarbons are available in market to replace R134a, but the optimum ratio and mass fraction to be used for better and safe performance of the system is given by only few researchers. As and when an existing system of R134a has to be recharged it is suggested to retrofit the system with new/natural and alternative refrigerants to full fill the objectives of the Montreal and Kyoto protocols.
Hence conversion of such systems to eco-friendly ones will be a major thrust area for refrigeration sector in the time to come. How-ever, the halogenated refrigerants having adverse environmental impacts such as ODP and GWP. In developing country like India, most of the VCR systems based on halogenated refrigerant are used due to its excellent properties. Deepak Paliwal, "Eco-Friendly Refrigerants as Substitutes for HFC134a - a Review," SSRG International Journal of Mechanical Engineering, vol.
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