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Development of two-phase flow expander for CO2 heat pumps and air conditioners.

Author(s) : SAKITANI K., MORIWAKI M., OKAMOTO M., et al.

Summary

The authors developed a two-phase flow expander for CO2 heat pumps and air-conditioners to improve the performance of a transcritical cycle. They selected the swing type as an evaluation result of the existing pump and compressor types from the viewpoints of performance, reliability with two-phase flow, applicable volume, and productivity when applied to expanders. The test results of the newly designed prototype of a two-stage swing expander showed high efficiency in energy recovery. According to the evaluation made by calculation when mounted on a heat pump, the expander gives substantial reduction in heating energy consumption when compared with traditional combustion type heaters.

Details

  • Original title: Development of two-phase flow expander for CO2 heat pumps and air conditioners.
  • Record ID : 2006-2818
  • Languages: English
  • Source: 8th IEA Heat Pump Conference 2005: global advances in heat pump technology, applications, and markets. Conference proceedings [CD-ROM].
  • Publication date: 2005/05/02

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