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Performance increase of carbon dioxide refrigeration cycle with the addition of parallel compression economization.

Author(s) : BELL I.

Summary

In a reciprocating compressor, if some of the cylinders are used to compress vapour in a parallel compression system from an intermediary pressure, a refrigerating effect and COP greater than that of the system with all of the cylinders on suction can be achieved. An analytic model was created that allowed environmental and physical parameters to be altered. The investigations also included experimentation with the addition of superheat for the primary compression path, for which the performance increases were noted for some operating conditions. The primary focus of the research was for the use of carbon dioxide in a standard air conditioning application. Accordingly, evaporation and condensation pressures were selected to correspond closely with evaporation and condensation temperatures for other refrigerants. The research demonstrates that under some conditions an economized carbon dioxide system outperforms a similar halocarbon system in terms of efficiency and capacity. In the end, this is the litmus test that proves that carbon dioxide can compete on the level with popular halocarbon refrigerants in this economized mode.

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Pages: 2004-2

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Details

  • Original title: Performance increase of carbon dioxide refrigeration cycle with the addition of parallel compression economization.
  • Record ID : 2005-2527
  • Languages: English
  • Subject: HFCs alternatives
  • Source: Natural Working Fluids 2004: 6th IIR-Gustav Lorentzen Conference
  • Publication date: 2004/08/01

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