System performance with R407A, R407B, R407C compared to R22.

Hans Jørgen Høgaard Knudsen

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    The article presents the results obtained by substituting R22 with mixture of R32/R125/R134A (R407A, R407B and R407C) in an existing refrigeration plant. Cooling capacity, coefficient of performance and heat transfer coefficient in the evaporator have been measured.The results show that for R407C both the cooling capacity and COP are smaller then the cooling capacity and COP with R22. The cooling capacity for R407A and R407B is lower than the capacity for R22 for brine temperatures less than 0 C and higher then the cooling capacity for R22 for brine temperatures higher than 0 C. The COP for R407A and R407B er lower than the COP for R22.The volumetric and isentropic efficiency of the compressor are with mixture higher than the volumetric and isentropic efficiency with R22.
    Original languageEnglish
    JournalScan Ref
    Issue number4
    Pages (from-to)5-9
    Publication statusPublished - 1997

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