Evaluation of a Refrigerant R410A as Substitute for R22 in Window Air-conditioner

CFCs have been phased out, except for essential users, and HCFCs are to be eliminated by 2020, because of their ozone depletion potential. This generates a need for the investigation of zero ozone depletion potential (ODP) refrigerants or refrigerant blends. R410A is among newer brand of refrigerant blends, with zero ODP. The biggest difference to R22 is the pressure levels generated which are more than 50% higher. The refrigerant R410A operates at higher pressure at the same saturated temperatures than R22, therefore system should be redesigned. The early laboratory trials of R410A in air conditioning systems have showed a significant increase in COP vs. R22. The apparent anomalous behavior of R410A has been shown to be due to its very favorable physical and transport properties. The overall COP of the system is 5 to 6% more than the R22.