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Application of an ejector in autocascade refrigeration cycle for the performance improvement.

Author(s) : YU J., ZHAO H., LI Y.

Type of article: Article, IJR article

Summary

This paper presented a novel auto cascade refrigeration cycle (NARC) with an ejector. In the NARC, the ejector is used to recover some available work to increase the compressor suction pressure. The NARC enables the compressor to operate at lower pressure ratio, which in turn improves the cycle performance. Theoretical computation model based on the constant pressure-mixing model for the ejector is used to perform a thermodynamic cycle analysis for the NARC with the refrigerant mixture of R-23/R-134a. The effects of some main parameters on cycle performance were investigated. The results show the NARC has an outstanding merit in decreasing the pressure ratio of compressor as well as increasing the COP. For NARC operated at the condenser outlet temperature of 40°C, the evaporator inlet temperature of -40.3°C, and the mass fraction of R-23 is 0.15, the pressure ratio of the ejector reaches to 1.35, the pressure ratio of compressor is reduced by 25.8% and the COP is improved by 19.1% over the conventional auto cascade refrigeration cycle.

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Pages: 279-286

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Details

  • Original title: Application of an ejector in autocascade refrigeration cycle for the performance improvement.
  • Record ID : 2008-0573
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 31 - n. 2
  • Publication date: 2008/03

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