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Performance characteristics of a scroll expander for CO2 refrigeration cycles.

Author(s) : KOHSOKABE H., KOYAMA M., TOJO K., et al.

Summary

To help lesser the effects of global warming, CO2 refrigeration cycles are required in refrigeration and air-conditioning applications. Work-output expansion devices (expanders) are needed to improve the system performances, but their efficiencies are still too low to make the systems practical. The improvement in the COP of a CO2 refrigeration cycle is highly dependent on the expander efficiency. To solve this problem, the authors developed a prototype of a scroll expander for CO2 refrigeration cycles and studied its performance characteristics. The experimental parameters are rotational speed, inlet pressure and temperature, exit pressure, and CO2 mass flow rate of the scroll expander. The test results show that the scroll expander had maximum measured isentropic efficiencies greater than 70%.

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Details

  • Original title: Performance characteristics of a scroll expander for CO2 refrigeration cycles.
  • Record ID : 2008-2421
  • 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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