Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Cooling Performance of Several $CO_2/propane$ Mixtures in an Air-Conditioning System

이산화탄소/프로판 혼합냉매의 냉방성능 특성

  • Kim, Ju-Hyok (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Kim, Min-Soo (School of Mechanical and Aerospace Engineering, Seoul National University)
  • 김주혁 (서울대학교 기계항공공학부) ;
  • 김민수 (서울대학교 기계항공공학부)
  • Published : 2006.01.01
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Abstract

[ $CO_2$ ] and propane mixtures were chosen as promising alternative refrigerants and their performance potentials were evaluated experimentally in an air-conditioning system. Pure $CO_2$ and 85/15, 75/25 and 60/40 binary blends by the charged mass percentage of $CO_2/propane$ were selected as working fluids. The effect of the inlet temperature of the secondary fluids and degree of superheat on the cooling performance was tested and discussed. The charging amounts of refrigerants were adjusted to make the system show the maximum COP. Comparisons among different refrigerants were carried out on the same compressor speed basis for a given operating condition. In addition, the temperature gliding effect of zeotropic mixtures on the system performance were analyzed based on the drop-in test results.

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References

  1. Kim, T. S., Shin, J. Y., Kim, M. S. and Ro, S. T., 1994, Cycle analysis and heat transfer characteristics of a heat pump using R22/ R142b refrigerant mixtures, Int. J. Refrig., Vol. 17, No. 6, pp. 391-400 https://doi.org/10.1016/0140-7007(94)90074-4
  2. Didion, D. A. and Bivens, D. B., 1990, Role of refrigerant mixtures as alternatives to CFCs, Int. J. Refrig., Vol. 13, pp. 163-175 https://doi.org/10.1016/0140-7007(90)90071-4
  3. Chang, Y. S., Kim, M. S. and Ro, S. T., 2000, Performance and heat transfer characteristics of hydrocarbon refrigerants in a heat pump system, Int. J. Refrig., Vol. 23, No. 3, pp. 232-242 https://doi.org/10.1016/S0140-7007(99)00042-0
  4. Chen, J. and Kruse, H., 1995, Calculating circulation concentration of zeotropic refrigerant mixtures, HVAC&R Research, Vol. 1, No. 3, pp. 219-231 https://doi.org/10.1080/10789669.1995.10391320