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Performance of HFC32/HFC125 Mixtures for Heat Pumps

HFC32/HFC125 혼합냉매의 히트펌프 성능 평가

  • Kim, Wook-Jin (Department of Mechanical Engineering, Inha University) ;
  • Kang, Dong-Gyu (Department of Mechanical Engineering, Inha University) ;
  • Lee, Yo-Han (Department of Mechanical Engineering, Inha University) ;
  • Jung, Dong-Soo (Department of Mechanical Engineering, Graduate School, Inha University)
  • 김욱진 (인하대학교 기계공학과) ;
  • 강동규 (인하대학교 기계공학과) ;
  • 이요한 (인하대학교 기계공학과) ;
  • 정동수 (인하대학교 기계공학과 대학원)
  • Received : 2011.08.24
  • Published : 2011.12.10

Abstract

In this study, performance of R410A(50%R32/50%R125) and HFC32/HFC125 mixture is measured to examine the effect of composition shift of R410A used for various air-conditioners and heat pumps. The composition of HFC32/HFC125 mixture varies from the reference composition of R410A ${\pm}10%$ with 5% interval. Tests carried out in a heat pump bench tester at the evaporation and condensation temperatures of $7/45^{\circ}C$ and $-7/41^{\circ}C$ for summer and winter conditions, respectively. Test results show that both the coefficient of performance (COP) and compressor power of the HFC32/HFC125 mixture have the maximum difference of 2.0% as compared to those of R410A. Compressor discharge temperatures of HFC32/HFC125 mixture are increased up to $6.7^{\circ}C$ as compared to that of R410A. The amount of charge for HFC32/HFC125 mixture vary within 5.6% as compared to that of R410A. Overall, performance of R410A is not appreciably affected by the composition shift of ${\pm}10%$ of R32 under both air-conditioning and heat pumping conditions.

Keywords

References

  1. United Nations Environment Programme, 1987, Montreal Protocol on Substances That Deplete the Ozone Layer, Final Act, New York, United Nations.
  2. United Nations Environment Programme, 2002, Production and Consumption of Ozone Depleting Substances Under the Montreal Protocol 1986-2000, Ozone Secretariat, UNEP, Nairobi, Kenya.
  3. Song, Y. J., Park, B. J., Jung, D. S., and Kim, C. B., 1998, Performance evalution of R22 alternative refrigerants, The Society Air-Conditioning and Refrigeration Engineers of Korea, Vol. 10, No. 3, pp. 292-392.
  4. Cecilia, G. and Lennart, V., 2000, Drop-in replacement of R22 in heat pumps used for district heating-influence of equipment and property limitations, 2001, International Journal of Refrigeration, Vol. 24, pp. 660-675. https://doi.org/10.1016/S0140-7007(00)00083-9
  5. ARI, 1992-1997, R22 and R502 Alternative Refrigerants Program, US Air-Conditioning and Refrigeration Institute.
  6. Korean Intellectual Property Office, 2000, The Report for Investigation of New Technology Trend(HVAC&R), Mechanics/Metalics, Vol. 6, pp. 537-541.
  7. Didion, D. A., 1994, Private Communication, US National Institute of Standards and Technology, Gaithersburg, MD.
  8. Hwang, E. P., Kim, C. N., and Park, Y. M., 1997, An Experimental Investigation of Thermodynamic Performance of R-22 Alternative Blends, The Society Air-Conditioning and Refrigeration Engineers of Korea, Vol. 9, pp. 408- 413.
  9. Kim, M.-H., Kim, K. J., and Oh, S. K., 2001, An Experimental Study on the Performance Improvement of a R410A Air-conditioner, The Society Air-Conditioning and Refrigeration Engineers of Korea, pp. 76-82.
  10. Kim, B. S. and Lee, S. H., 1999, Performance of a room air conditioner using R410A according to the variation of outdoor temperature, The Society Air-Conditioning and Refrigeration Engineers of Korea, Vol. 11, No. 4, pp. 537-541.
  11. Na, B., Yun, J. Y., Kwak, T. H., and Jang. D. Y., 1999, Refrigerant Pressure Drop Effect on the System Performance with R410a, The Society Air-Conditioning and Refrigeration Engineers of Korea, pp. 214-218.
  12. Kang, H., Lee, S., Joo, Y., Chung, H., Kim, Y., and Choi, J., 2007, Experimental Study on the Performance Characteristics of a Simultaneous Heating and Cooling Heat Pump System at Each Operating Mode, The Society Air- Conditioning and Refrigeration Engineers of Korea, Vol. 19, No. 10, pp. 679-686.
  13. Mulroy, W., Kauffeld, M., McLinden, M. O., and Didion, D. A., 1988, Experimental Evaluation of Two Refrigerant Mixtures in a Breadboard Air Conditioner, Proc. of Int. Inst. Refrigeration, Purdue Conference on CFCs, Commissions B1, B2, E1 and E2, pp. 27-34.
  14. Lemmon, E. W., Huber, M. L., and McLinden, M. O., 2007, NIST Reference Fluid Thermodynamics and Transport Properties, REFPROP version 8.0.
  15. Domanski, P. A., Didion, D. A., and Chi, J., 2003, NIST vapor compression cycle design program, CYCLE-D version 3.0.