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An experimental evaluation of medium and high pressure HFC replacements for R22.

Author(s) : HWANG Y., JUDGE J. F., RADERMACHER R.

Summary

In the paper, three substitutes of R22 are investigated: a ternary mixture of R32-R125-R134a and two binary mixtures, R32-R125. The performance of these refrigerants is investigated in a residential heat pump originally designed for R22. Some changes are introduced in the refrigeration circuits. The ternary mixture has the advantage of being a "retrofit" (minimal changes to the system). Only the expansion devices and the refrigerant charge should be chosen carefully to have performance within 7.8% of R22. The two binary refrigerants require careful design considerations, especially heat exchangers, pipes, and compressors due to the much higher operating pressures; they have the benefit of higher steady state and seasonal performances. These benefits may be even larger if the system is designed specifically for these fluids.

Details

  • Original title: An experimental evaluation of medium and high pressure HFC replacements for R22.
  • Record ID : 1996-3268
  • Languages: English
  • Source: Stratospheric Ozone Protection for the 90's. 1995 International CFC and Halon Alternatives Conference & Exhibition. Conference proceedings.
  • Publication date: 1995/10/23
  • Document available for consultation in the library of the IIR headquarters only.

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