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Performance trends in an ammonia-water resorption cycle.

Author(s) : HEWITT N. J., MCMULLAN J. T., MONGEY B., et al.

Summary

An experimental test facility has been constructed to examine the potential of ammonia-water mixtures as the working fluid in high temperature heat pumps. The nature of the working fluid necessitates the addition of a solution circuit in parallel with the compressor and leads to the resorption cycle. The composition of the working fluid can be altered by variation of the flow ratio between the compression and solution pump circuits inducing changes in the dryness fraction at the end of the heat transfer process in the desorber. Higher rates of heat transfer from the source to the working fluid were measured as the ammonia concentration in the circulating fluid increased, though this was accompanied by lower overall flow rates of the circulating fluid. A 0.7% ammonia concentration is thought to be the optimum composition for the working fluid if the maximum COP is to be achieved.

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Details

  • Original title: Performance trends in an ammonia-water resorption cycle.
  • Record ID : 2000-1340
  • Languages: English
  • Source: 20th International Congress of Refrigeration: Refrigeration into the Third Millennium.
  • Publication date: 1999/09/19

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