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Development of two-stage semi-hermetic CO2 compressors.

Author(s) : NEKSÅ P., DORIN F., REKSTAD H., et al.

Summary

A semi-hermetic CO2 compressor series in the range of 0.5-12.6 m3/h swept volume is under development (single- and two-stage compressors with two cylinders, running at nominal speeds of 2900 rpm). This corresponds to cooling capacities in the range of 0.6-15 kW at -35 °C evaporating temperature. Different design issues are being discussed. Measurements of compressor efficiencies, temperatures and pressures are presented for two-stage compressors in the 4-pole assembly (1450 rpm) and also for 2900 rpm. At this stage of the development, the performance is very acceptable. Compared to using a one-stage compressor for low-temperature supermarket refrigeration, a gain in COP of 20% could be realized and probably an additional 30% by using two-stage throttling.

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Pages: 2000-1

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Details

  • Original title: Development of two-stage semi-hermetic CO2 compressors.
  • Record ID : 2002-0040
  • Languages: English
  • Source: Final proceedings of the 4th IIR-Gustav Lorentzen Conference on Natural Working Fluids at Purdue.
  • Publication date: 2000/07/25

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