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Experimental investigation of a scroll expander in a carbon dioxide air-conditioning system.

Author(s) : HUFF H. J., RADERMACHER R., PREISSNER M.

Summary

Carbon dioxide (CO2) is a potential substitute for HCFC refrigerants with favourable environmental properties compared with other HCFC alternatives. One of the major challenges of using CO2 in air-conditioning applications is the low energy efficiency of the system at higher heat sink temperatures. The energy efficiency of a transcritical carbon dioxide (CO2) air-conditioning system can be improved significantly when the throttling valve is replaced by a work-producing expansion device (expander). Two automotive R134a scroll compressors were modified for use as expanders in CO2 air-conditioning systems. The highest isentropic efficiency of the expander was in the range of 50%. The maximum volumetric efficiency was 68%.

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Details

  • Original title: Experimental investigation of a scroll expander in a carbon dioxide air-conditioning system.
  • Record ID : 2004-1036
  • Languages: English
  • Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
  • Publication date: 2003/08/17

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