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Research Article

JCR. 2020; 7(18): 2322-2330


Mohit Singh Raghav, Harsh Rai, Neeraj Saraswat.

In this work, CCS for heating and cooling applications is investigated by thermodynamic performance
assessment perspective. The thermodynamic properties of the subcomponents of CCS are calculated by EES
software (EES, 2017). The temperature, pressure, enthalpy, entropy, and exergy rate of CCS stages for different
refrigerants are illustrated. A Comparative assessment of a cascade refrigeration cycle with different refrigerant
pair such as CO2-HFE7000, CO2-R134a, CO2-R152a, CO2-R32, CO2-R1234yf, CO2-365mfc, CO2-NH3, CO2-
Propane and CO2-Propylene is presented in this paper. The effects of the thermodynamic parameters on the
cascade system are evaluated with an objective to find the best working fluid pair based on COP. In addition, the
parametric study is performed to comprehend how evaporator and condenser temperatures influence on the
energy and exergy efficiency, and exergy destruction rate of the system for a more efficient process design.
CO2-NH3is selected based on highest coefficient of performance CCS for cooling application whereas the
lowest coefficient of performance CCS is obtained as 1.777 for CO2-R1234yf refrigerant couple.

Key words: cascade refrigeration system, co-efficient of performance, exergy destruction rate , exergy efficiency, CO2-HFE7000, CO2

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