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Lower GWP refrigerants compared to R404A for economizer style compressors.

Number: pap. 1390

Author(s) : SJOHOLM L., KLEINBOEHL C., MA Y. C.

Summary

Two economizer style compressors are explored, where the high pressure liquid is sub-cooled with a heat exchanger, while the evaporation side in the heat exchanger is connected to an intermediate compressor port. The intermediate port has a higher pressure than the suction pressure and a lower pressure than the discharge pressure. The two compressors being studied are of the scroll and screw type. One of the compressors is an open shaft compressor and the other one is a hermetic compressor. Both compressors have been modeled based on test data with R404A and at conditions that correspond to TRU (Transport Refrigeration Unit) applications. The compressor models have been used to explore lower GWP refrigerants such as R407A, R407F, N-40a, DR7 and DR33. For both compressors, each alternative refrigerant is compared against the baseline refrigerant R404A. This paper examines discharge temperature, capacity and "capacity/input power" (or COP, coefficient of performance) relative to the R404A baseline.

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Pages: 7 p.

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Details

  • Original title: Lower GWP refrigerants compared to R404A for economizer style compressors.
  • Record ID : 30014112
  • Languages: English
  • Source: 2014 Purdue Conferences. 22nd International Compressor Engineering Conference at Purdue.
  • Publication date: 2014/07/14

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