Journal Press India^®

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This paper mainly deals with the exergy analysis of Four stages cascade refrigeration systems used for low temperature applications using ecofriendly refrigerants. The effect of performance parameters (i.e. approaches, condenser temperature, and temperature variations in the evaporators) on the thermal performances in terms of second law efficiency of the system (exergetic efficiency) and exergy destruction ratio (EDR) and first law efficiency (i.e. overall coefficient of performance) have been optimized thermodynamically using of R1234yf and R1234ze in the high temperature circuits and mainly thirteen ecofriendly refrigerants in the intermediates circuits and ethane It was observed that in the low temperature (between- 80 oC to -88 oC) applications. It was observed that the best combination in terms of R1234ze-R134a-R410a-ethane gives better thermal performance than using R1234yf-R134a-R410a-ethane.

Keywords

Four stages Cascade Refrigeration, Energy- Exergy Analysis; First and Second Law Analysis; Low Temperature Applications

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