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Analysis of an ejector vapour compression cycle for household refrigerator.

Number: pap. n. 471

Author(s) : ARTECONI A., CIRIACHI G., ACAR M., et al.

Summary

There are several ways of improving the performance of a vapour compression refrigeration cycle and using an ejector as expansion device is one of the possibilities. As a matter of fact, the ejector can reduce throttling losses in refrigeration systems. In this paper a comparison between a real vapour compression cycle for a household refrigerator and ejector vapour compression cycles is performed by simulation in order to evaluate the performance enhancement that can be obtained. The analysis of the ejector cycle, considering both a constant area and a constant pressure device, is presented by varying the schematic of the system and performance parameters. The best performing cycle is a constant pressure ejector cycle without any suction liquid heat exchanger: it can allow improvements over the standard reference cycle whenever the primary nozzle efficiency is above 50% and diffuser efficiency above 60%. When all the nozzles efficiency are set to 85%, the COP improvement achievable is about 9%.

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Pages: 8 p.

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Details

  • Original title: Analysis of an ejector vapour compression cycle for household refrigerator.
  • Record ID : 30015906
  • Languages: English
  • Source: Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
  • Publication date: 2015/08/16
  • DOI: http://dx.doi.org/10.18462/iir.icr.2015.0471

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