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Optimising the refrigeration cycle with a two-stage centrifugal compressor and a flash intercooler.

Author(s) : RÖYTTÄ P., TURUNEN-SAARESTI T., HONKATUKIA J.

Type of article: Article, IJR article

Summary

The optimisation of a refrigeration process with a two-stage centrifugal compressor and flash intercooler is presented in this paper. The two-stage centrifugal compressor stages are on the same shaft and the electric motor is cooled with the refrigerant. The performance of the centrifugal compressor is evaluated based on semi-empirical specific-speed curves and the effect of the Reynolds number, surface roughness and tip clearance have also been taken into account. The thermodynamic and transport properties of the working fluids are modelled with a real-gas model. The condensing and evaporation temperatures, the temperature after the flash intercooler, and cooling power have been chosen as fixed values in the process. The aim is to gain a maximum COP. The method of optimisation, the operation of the compressor and flash intercooler, and the method for estimating the electric motor cooling are also discussed in the article.

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Pages: pp. 1366-1375

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Details

  • Original title: Optimising the refrigeration cycle with a two-stage centrifugal compressor and a flash intercooler.
  • Record ID : 2009-1999
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 6
  • Publication date: 2009/09

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