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Axial and radial force control for CO2 scroll expander.

Author(s) : HIWATA A., IKEDA A., MORIMOTO T., et al.

Summary

The authors made the prototype of the scroll expander for the CO2 refrigerant, which had the high-pressure vessel. They also designed the new scroll profile to make use of "over-expansion" and control the axial force on the thrust bearing. These techniques realized that the orbiting scroll never separated from the stationary scroll when the operating condition changed dramatically. As the result, the high volumetric efficiency was achieved. The authors calculated the oil-film pressure of the main and eccentric bearings, considering both the dynamic behaviour of the shaft and the interaction between the orbiting and stationary scroll wraps. From the calculation results, they could control the radial force between the scroll wraps, which contributed to decrease the leakage loss in expansion process.

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Details

  • Original title: Axial and radial force control for CO2 scroll expander.
  • Record ID : 2008-2483
  • 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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