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Efficiency evaluation of a miniature multi-stage compressor under insufficient inter-stage cooling conditions.

Author(s) : LIU Y., MIAO N., DENG Y., et al.

Type of article: Article, IJR article

Summary

A miniature multi-stage compressor (MMSC) with an integrated inter-stage cooler has been proposed. This study aims to evaluate the efficiency of each stage of the MMSC under insufficient inter-stage cooling conditions through numerical simulation. The results show that the volumetric efficiency of first-stage, second-stage, third-stage and fourth-stage reduced by an average of 1.43%, 1.86%, 2.32%, and 2.56% respectively as suction temperature increases every 10°C, indicating that the temperature has more remarkable influences on the volumetric efficiency with the increase of pressure and the decrease of cylinder diameter. For every 10°C increase in temperature, the isentropic efficiencies are all reduced by about 1%. And it should be noted that when the suction temperatures of the second, third, fourth stage cylinder exceed 120°C, 70°C, and 50°C, respectively, the valve flutters severely, indicating that the valve has a poor applicability to the current operating conditions.

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Pages: 169-179

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Details

  • Original title: Efficiency evaluation of a miniature multi-stage compressor under insufficient inter-stage cooling conditions.
  • Record ID : 30025357
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 97
  • Publication date: 2019/01
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2018.09.009

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