Alternative, direct expansion cooling systems used in refrigerant evaporator and condenser examination of the parameters that affect the capacity of

In this study, an alternative refrigerant used in direct expansion systems. HCFC-22 alternatives, HFC-422D and HFC-417A refrigerants used in the experiment. These gases are widely used. The uses of these gases do not need to change the oil and parts. Theoretical study of these gases were compared with the performance Duprex 3.2 software. The results obtained, the cooling effect coefficient, flow rate of refrigerant, compressor, compression work, discharge line temperature, the com-pression ratio. These values were compared among themselves. Then the results obtained from experimental studies, compared with results obtained from theoretical studies. As a result of this comparison showed that, as a result of theoretical studies with experimental conditions, the results show differences in the results obtained. Finally, for refrigerants used in the experimental study, log p-h diagrams were com-pared. Comparison of the indirect effects of global warming when the heating effect is proved to have the highest R422D.