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performance analysis of co2 refrigerant over r12,r22,r134a refrigerant

DESCRIPTION: The present work is an experimental comparative study of the whole refrigerating cycles in general among an R134a, R12, R22 conventional refrigerating cycles and a carbon dioxide (CO2) trans critical refrigerating system. The conventional refrigerator using R12, R22 and R134a has been experimentally tested in a calorimeter setup, while the CO2 refrigerator has been validated in a specific experimental unit specially designed and built to analyze high pressure single stage vapour compression trans critical refrigerating equipments. In order to validate this laboratory setup, a detailed numerical simulation of the thermal and fluid dynamic behavior of single stage vapour compression refrigerating unit has been developed and used.

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