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Extended Exergy Analysis Based Comparison of Subcritical and Transcritical Refrigeration Systems
JAHAR SARKAR,Dnyanesh Joshi 대한설비공학회 2016 International Journal of Air-Conditioning and Refr Vol.24 No.2
The main purpose of this study is to apply advanced exergy analysis to the transcritical CO2 vapor compression refrigeration system, and compare with the analysis of subcritical cycle using ammonia and R404a. Endogenous, exogenous, avoidable and unavoidable exergy destructions are determined for each component of these systems. For CO2 system, compressor contributes highest avoidable endogenous exergy destruction and gas cooler contributes highest avoidable exogenous exergy destruction. It is concluded that compressor is the ¯rst component for CO2 and R404a, and evaporator is the ¯rst component for NH3 to be improved. System improvement options to reduce the exergy destruction are discussed as well.