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In this study, 14 refrigerant mixtures composed of R32, R125, R134a, R152a, R290 (propane) and R1270 (propylene) were tested in a breadboard heat pump in an attempt to substitute HCFC-22 used in residential air-conditioners. The heat pump was of 3.5 kW capacity with water as the heat transformer fluid (HTF) in the evaporator and condenser that are in a counter current flow configuration. All tests were conducted with the HTF temperatures fixed to those found in the ARI test A condition. Test results show that ternary mixtures composed of R32, R125, and R134a have a 4-5% higher COP and capacity than HCFC-22. On the other hand, ternary mixtures containing R125, R134a and R152a have both lower COPs and capacities than HCFC-22. R32/R134a binary mixtures show a 7% increase in COP with the similar capacity to that of HCFC-22 while R290/R134a azeotrope shows a 3-4% increases in both COP and capacity. The compressor discharge temperatures of the mixtures tested are much lower than those pf HCFC-22, indicating that these mixtures would offer better system reliability and longer life time than HCFC-22. Finally, test results with a suction line heat exchanger (SLHX) indicate that SLHX must be used with special care in air-conditioners. Since its effect is fluid dependent.
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Details
- Original title: Performance of alternative refrigerant mixtures for HCFC-22.
- Record ID : 2000-2400
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 23 - n. 6
- Publication date: 2000/09
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See other articles in this issue (5)
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HCFC-22 alternatives for air conditioners and h...
- Author(s) : BIVENS D. B., SHIFLETT M. B., WELLS W. D., SHEALY G. S., YOKOZEKI A. M., PATRON D. M., KOLLIOPOULOS K. A., ALLGOOD C. C., CHISOLM T. E. C.
- Date : 1995/06/24
- Languages : English
- Source: ASHRAE Transactions.
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Fluorocarbon blends as R22 substitutes.
- Author(s) : AHNEFELD G., WOBST E.
- Date : 1994/11/16
- Languages : German
- Source: DKV-Tagungsbericht 1994 Bonn.
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Practical experience with an alternative to R22...
- Author(s) : LOW R. E., GILBERT B. E., DEKLEVA T. W.
- Date : 1994/10/24
- Languages : English
- Source: The 1994 International CFC and Halon Alternatives Conference. Stratospheric Ozone Protection for the 90's. Proceedings.
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Field test using HCFC22 replacements.
- Author(s) : BARREAU M., WEISS P., FAUVARQUE P.
- Date : 1995/10/23
- Languages : English
- Source: Stratospheric Ozone Protection for the 90's. 1995 International CFC and Halon Alternatives Conference & Exhibition. Conference proceedings.
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Performance tests of R22 and R32-R125-R134a mix...
- Author(s) : MEI V. C., CHEN F. C., CHEN D. T., HUANG-FU E. P.
- Date : 1995/06/24
- Languages : English
- Source: ASHRAE Transactions.
View record