Variations in the Thermal Performance of R22 and R410A Refrigeration Systems Depending on Operation Conditions

  • Published : 2004.03.01


Experiments have been conducted in order to make comparisons of characteristics of a R410a cycle with a R22 cycle in terms of cooling capacity and coefficient of performance (COP). The parameters examined in the present work include air flow rate, indoor and outdoor air temperatures, and indoor relative humidity. These two refrigeration cycles constructed for this study share all components except compressor, accumulator, oil separator, and piping. The measurements were made using a psychrometric calorimeter. The experimental results show that the R410A cycle has several advantages for indoor units while the R22 cycle yields better performance for outdoor units.



  1. Didion, D. A. and Bivens, D. B., 1990, Role of refrigerant mixture as alternatives to CFCs, Int J. Refrig., Vol. 13, pp. 163-175
  2. Takashi Okazaki, Yoshihiro Sumida and Yo-shiaki Tanimura, 1996, Heat transfer characteristics in horizontal tubes for R-407C and R-410A, the Int. Symposium on HCFC Alternative Refrigerants, pp. 51-55
  3. Korean Intellectual Property Office, 2000, The Report for Investigation of New Technology Trend (HVAC&R), Mechanics/Metalics, Vol. 6, pp. 537-541
  4. Kim, B. S. and Lee, S. H., 1999, Performance of a room air conditioner sucing R-410A according to the variation of outdoor temperature, Korean Journal of AirConditioning and Refrigeration Engineering, Vol. 11, no. 4, pp. 537-541
  5. Murphy, F. T., Low, R. E., Gilbert, B. E., Linton, J.W., Snelson, W. K. and Hearty, P. F., 1995, Comparison of R-407C and R-410A with R-22 in a 10.5KW(3.0TR) residential central airconditioner, International CFC and Halon Alternative Conference: Proceeding pp. 31-40
  6. Cho, J. P., Oh, W. K., Kim, N. H., Kim, Y. S., Koo, M. S., You, K. S. and Choi, Y. H., 2001, An experimental study on the residential airconditioning system with variations of charging conditions and capollary tubes, Proceedings of the KSME 2001 Fall Annual Meeting, pp. 213-217
  7. Lee, Y. S., Jun, Y. H., Kim, D. H., Chang, K. S., Youn, B., Moon, J. M., Hong, J. T. and Oh, M. D., 2002, An Experimental study on the cooling and heating characteristics of sys-tem air-conditioner using the digital scroll compressor, Proceedings of the SAREK 2002 Summer Annual Conference, Volume II, pp. 575-580
  8. McLinden, M.O., Klein, S.A., Lemmon, E.W. and Peskin, A.P., 1998 REFPROP V. 6.01, NIST