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Modelling and testing of a two-stage rotary compressor.

Author(s) : MATHISON M. M., BRAUN J. E., GROLL E. A.

Summary

While previous research studies have analyzed the compression process of single-stage rotary compressors, little information is available on two-stage rotary compressors. However, two-stage compressors provide opportunities for energy savings through modifications such as intercooling and economizing. This paper presents a computer model of a hermetic two-stage rotary compressor that was developed to provide design engineers with the means to optimize the compressor design. The computer model considers the effects of leakages and heat transfer in its calculations to estimate the compressor power input and refrigerant mass flow rate. The model can be operated both with and without intercooling between the stages. External measurements were conducted using a prototype compressor to validate the model. The intermediate temperature and pressure, discharge temperature, power consumption, and mass flow rate were recorded for seventeen different operating conditions. The model predicts the compressor power consumption and mass flow rate within plus or minus 5% of the experimental results.

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Details

  • Original title: Modelling and testing of a two-stage rotary compressor.
  • Record ID : 2008-2466
  • 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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