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Investigation of a two-phase ejector as a second-step compressor for refrigeration systems.

Number: pap. ID: 678

Author(s) : SMIERCIEW K., BUTRYMOWICZ D., KARWACKI J., et al.

Summary

The paper describes the investigation of the refrigeration vapour compression cycle equipped with the two-phase ejector used as a second step compression device. In the described cycle, the compressor discharge pressure is lower than the condensation pressure. The additional compression is provided by the ejector. This approach may lead to reduce the power consumption of the compressor and therefore improving the efficiency of the compression cycle. A testing stand has been build. The experimental investigations have been carried out with refrigerant R507. The experiments covered two geometries of the ejector equipped with the sharp-edge motive nozzles of various diameters. The relative compression ratio defined as the ratio of the compression produced by the ejector to motive pressure difference in the reported experiments was up to 0.20 and mass entrainment ratio was up to 0.30. It was shown that the compression ratio and entrainment ratio strongly depend on the operation parameters of the system.

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Pages: 8 p.

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Details

  • Original title: Investigation of a two-phase ejector as a second-step compressor for refrigeration systems.
  • Record ID : 30002125
  • Languages: English
  • Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Publication date: 2011/08/21

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