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Desorber and rectifier geometries for ammonia-water absorption systems; Part I: Experimental approach and heat transfer.

Author(s) : DELAHANTY J. C., HUGHES M., GARIMELLA S.

Type of article: IJR article

Summary

An experimental study of ammonia-water desorption in compact counter-flow geometries was conducted. Two novel vapor generation units, comprising integrated desorber, analyzer, and rectifier segments that use microchannel geometries, were conceptualized. The branched-tray concept features a desorber that uses pool-boiling mechanisms, while the vertical column desorber relies on falling-film evaporation mechanisms. Both concepts rely on falling-film mechanisms in the analyzer and rectifier sections. The vapor generation unit test sections were evaluated across a range of concentrated solution mass fractions (0.400 – 0.550), desorber coupling-fluid inlet temperatures (170 – 190°C), and concentrated solution flow rates (0.70 – 1.3 g s−1). This paper, Part I, reports the experimental methodology and results while in Part II, flooding limits of these geometries and heat and mass transfer models that accurately predict component-level performance are presented.

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Pages: 111-123

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Details

  • Original title: Desorber and rectifier geometries for ammonia-water absorption systems; Part I: Experimental approach and heat transfer.
  • Record ID : 30028158
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 123
  • Publication date: 2021/03
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2020.10.020
  • Document available for consultation in the library of the IIR headquarters only.

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