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Refrigeration leakage flow evaluation for scroll compressors.

Author(s) : ISHII N., BIRD K., SANO K., OONO M., IWAMURA S., OTOKURA T.

Summary

The paper presents a theoretical evaluation for the refrigerant gas leakage flows through the axial and radial clearances between the fixed and orbiting scrolls in scroll compressors, based on an incompressible and viscous flow theory. First, the time-dependent pressure drops in an initially pressurized closed vessel, due to refrigerant leakage flow through the axial or radial clearance, were carefully measured to address the refrigerant leakage effects. Subsequently, the time-dependent pressures were carefully simulated by a simple incompressible and viscous flow theory, thus resulting in a good agreement with the measured results. Additionally, the refrigerant leakage flows were calculated by a compressible and viscous flow theory to simulate the time-dependent pressure drops, but no reasonable result could be ensured. The paper concludes that the refrigerant leakage flows in scroll compressors can be well simulated by a simple incompressible and viscous flow theory, assuming an entire turbulent leakage flow and a difficult treatment, such as a compressible and viscous flow simulation, are not necessarily useful.

Details

  • Original title: Refrigeration leakage flow evaluation for scroll compressors.
  • Record ID : 1997-0216
  • Languages: English
  • Source: Proceedings of the 1996 International Compressor Engineering Conference at Purdue.
  • Publication date: 1996/07/23
  • Document available for consultation in the library of the IIR headquarters only.

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