Abstract
This paper mainly focus on CFCs and their alternatives to their use. The main critical issue in the field of green technologies is to develop the relationship between ODP and GWP and suggest new and alternative refrigerants which do not damage ozone layer and not to increase global warming. The first and second law thermodynamic analysis of vapor refrigeration system of 1.5 ton capacity for five eco-friendly refrigerants such as (R-1234yf, R-1234ze, propane (R-290), isobutene (R-600a), butane (R-600)) have been carried out in terms of performance parameters such as COP, Exegetic efficiency, ratio of exergy destruction in components such as condenser, compressor, throttle valve and evaporator. These performance parameters have been evaluated by varying condenser temperatures in the range from 300K to 327K and evaporator temperatures in the range from 274 K to 279K. It was observed that R-290 and R-600 (butane) and R-600a (isobutene) of zero ODP and zero GWP is best alternatives if its flammable problem will mitigate and R-1234ze (of zero ODP), are the next option of R-22 refrigerant.
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