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Developing a two-stage rotary compressor for CO2 heat pump systems with refrigerant injection.

Author(s) : YOKOYAMA T., SASAKI K., SEKIYA S., et al.

Summary

The reduction of greenhouse gas emissions has been the focus of global attention. As an alternative refrigerant to HFC, CO2 has been considered. As another promising possibility of energy conservation, use of heat pump systems has also been spreading. However, conventional heat pump systems have problems remaining, such as inadequate heating capacity or overheating of the compressor due to reduced performance under ambient low temperature condition. To solve these problems, the authors developed a two-stage rotary compressor for CO2 heat pump systems, examined the effects of the injection into an intermediate pressure connector under the condition of a high pressure ratio and offered the proof of its high efficiency. They also examined the unique performance characteristics of the two-stage rotary compressor by its loss analysis. They clarified the merits of the two-stage rotary compressor's performance compared to those of a single-stage rotary compressor.

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Details

  • Original title: Developing a two-stage rotary compressor for CO2 heat pump systems with refrigerant injection.
  • Record ID : 2008-2732
  • Languages: English
  • Source: 2008 Purdue Conferences. 19th International Compressor Engineering Conference at Purdue & 12th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2008/07/14

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