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Refrigeration cycle with two-phase condensing ejector.

Author(s) : BERGANDER M. J.

Summary

The paper describes the development of a novel vapour compression cycle for refrigeration with regenerative use of the potential energy of two-phase flow expansion, which in traditional systems is lost in expansion valves. The new cycle includes a second step compression by an ejector device, which combines the compression with simultaneous throttling of the liquid. The compressor compresses the vapour to approximately 2/3 of the final pressure and additional compression is provided in an ejector, thus the amount of mechanical energy required by a compressor is reduced and the efficiency is increased. Investigations described here were performed under the funding from the US Department of Energy. The thermodynamic model was developed for R-22, showing a possible efficiency improvement of 38% as compared to the traditional vapour compression cycle. The theoretical work was followed by building a 10 kW prototype and practical demonstration of 16% energy savings in the first attempt.

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Details

  • Original title: Refrigeration cycle with two-phase condensing ejector.
  • Record ID : 2007-1511
  • Languages: English
  • Source: 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2006/07/17

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