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System drop-in tests of refrigerant blend R125-R143-R134a (44-52-4%) compared to R502.

Author(s) : SNELSON W. K., LINTON J. W., TRIEBE A. R., HEARTY P. F.

Summary

This near-azeotropic blend, known as R404A, is a long-term, zero-ODS replacement for the low-temperature refrigerant R502. A series of tests were done to compare its system drop-in performance with that of R502. The tests were carried out, under controlled conditions in a well-instrumented alternative-refrigerants test facility, using an open-drive reciprocating compressor and counterflow heat exchangers. Test data were used to compare important compressor performance characteristics, including shaft power, pressure ratio, and compressor discharge temperature. System performance characteristics were also measured, including evaporator capacity, refrigerant mass flow, and cooling COP. The effect of additional liquid subcooling on the evaporator capacity and COP was also evaluated.

Details

  • Original title: System drop-in tests of refrigerant blend R125-R143-R134a (44-52-4%) compared to R502.
  • Record ID : 1996-1440
  • Languages: English
  • Source: ASHRAE Transactions.
  • Publication date: 1995/01
  • Document available for consultation in the library of the IIR headquarters only.

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