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Comparison of combined heat and mass transfer analysis and heat transfer only analysis in the design of a GAX condenser.

Author(s) : KANG Y. T., VITTAL M., CHRISTENSEN R. N.

Summary

The generator-absorber heat exchange (GAX) cycle using an ammonia-water solution pair has been recommended for residential and small-scale commercial applications. The paper develops two different models for the design of a condenser in the GAX system. The results show that only one of these models should be used for designing ammonia-water condensers. If one assumes that the condensing vapour has the same concentration as that of the bulk vapour or the liquid as in the other model, significant errors will be introduced in the calculation of the condenser lenght. It is also shown that the heat transfer coefficient in coolant side has a dominant effect on the size of the condenser in the region where pure ammonia condenses while the heat transfer coefficient in the bulk vapour side, has a dominant effect in the region where the binary mixture condenses.

Details

  • Original title: Comparison of combined heat and mass transfer analysis and heat transfer only analysis in the design of a GAX condenser.
  • Record ID : 1998-0234
  • 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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