Journal Press India^®

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This paper mainly deals with comparative computation performance evaluation of sixteen ecofriendly refrigerants used in the two stage vapour compression refrigeration system based on energetic and exergetic principles for findingsystem and components irreversibilities . Performance parameters have been evaluation using entropy generation concept. The numerical computation was carried out for finding rational exergy destruction ratio based on system exergy input in terms of total work dene by compressors as will as exergy destruction ratio based on exergy of product out and first law efficiency in terms of COP . The second law efficiency in terms of exergetic efficiency is also computed at different input variations . It was found Flash chamber responsible for highest exergy destruction for all refrigerants taken under consideration . R123 shows best first law efficiency and R125 shows lowest first law performance among selected sixteen ecofriendly refrigerants The first and second law performance of using R1234ze (of GWP =6) is better than R1234yf (of GWP=4) for higher temperature applications. The exergy destruction using R134a is higher than R152a. R1234yf refrigerant has (GWP = 4) can be used for high temperature applications which can replace R134a around 2030 and R152a, R600a, , R290, R600 are flammable in nature can be used by using safety measures. Therefore R134a recommended for all kind of applicationsbefore 2030.

Keywords

Irreversibility; Exergetic Efficiency; Two Stage Vapour Compression Refrigeration Systems

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