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Numerical modelling of the start up transient in reciprocating compressors.

Author(s) : LINK R., DESCHAMPS C. J.

Summary

Most simulation methodologies for compressors available in the literature consider a steady state operating condition. However, several phenomena that affect the compressor energy efficiency, noise level and reliability are associated with transient effects that occur when the compressor is either switched on or switched off. This paper presents a methodology, experimentally validated, to simulate the compressor start up, but considering a thermal equilibrium condition. From the results for the voltage during the start up, it is shown that the compressor equalization pressure greatly affects the torque that the electrical motor must overcome. It is also observed that mechanical losses are influenced by the compressor transient operation condition, with the bearing geometry being a factor of particular importance.

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Pages: ICR07-B2-1604

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Details

  • Original title: Numerical modelling of the start up transient in reciprocating compressors.
  • Record ID : 2008-0128
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

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