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Results and perspective of an ammonia-water cycle with high temperature lift using reverse rectification.

Author(s) : KAHN R., HUGO H., ALEFELD G.

Summary

The COP of a conventional ammonia-water cycle can be significantly improved by a reverse rectification-column and a second absorber which is combined with a two-stage refrigerant expansion. At an internal temperature lift of 85 K (-20 to 65 deg C) these modifications result in a 50% higher COP for cooling-assuming ideal components. The proposed cycle with reverse rectification was realized in a laboratory test plant with a refrigeration capacity of 10 kilowatts at -20 deg C. This machine was operated at a solution temperature up to 225 deg C and a condenser pressure up to 3 megapascals. The authors measured the COP versus temperature lift and the load behaviour. A COP of 0.38 was achieved at a temperature lift of 85 K. Furthermore it will be discussed how the COP of a triple-effect plant can be improved by reverse rectification.

Details

  • Original title: Results and perspective of an ammonia-water cycle with high temperature lift using reverse rectification.
  • Record ID : 1998-0864
  • Languages: English
  • Source: Ab-sorption 96. Towards sustainable technologies. Proceedings./ Ab-sorption 96. Vers les technologies durables. Comptes rendus.
  • Publication date: 1996/09/17
  • Document available for consultation in the library of the IIR headquarters only.

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