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Preliminary study of a novel R718 refrigeration cycle with single stage centrifugal compressor and two-phase ejector.

Author(s) : SAREVSKI M. N., SAREVSKI V. N.

Type of article: Article, IJR article

Summary

The paper describes the investigations of a novel R718 refrigeration cycle with single stage centrifugal compressor and two-phase ejector as a second stage compression device. The limitations of the R718 centrifugal stage pressure ratio, connected with small molecular mass of the water and high isentropic exponent, result on high impeller peripheral speed, high Mach number and high discharge temperature. Reynolds number is low and dimensions of the compressor stage are large. The complex thermal and flow phenomena inside two-phase ejector flow field are investigated and performance characteristics are estimated. Although efficiency of the concept of compression with hydraulic pump and two-phase ejectors is lower, the integration of two-phase ejectors in the R718 centrifugal unit results in low cost high capacity refrigeration system with high energy efficiency, competitive with traditional refrigeration systems by environmental, technical and economical reasons.

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Pages: 435-449

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Details

  • Original title: Preliminary study of a novel R718 refrigeration cycle with single stage centrifugal compressor and two-phase ejector.
  • Record ID : 30010816
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 40
  • Publication date: 2014/04

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