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Two-phase refrigerant distribution in a parallel-flow heat exchanger.

Author(s) : KIM N. H., HAM J. H., KIM D. Y.

Summary

The R-134a flow distribution is experimentally studied for a heat exchanger composed of round headers and 10 flat tubes. The effects of tube protrusion depth as well as mass flux, and quality are investigated. The flow at the header inlet is stratified. For the downward flow configuration, most of the liquid flows through frontal part of the header. The liquid distribution improves as the protrusion depth or the mass flux increases, or the quality decreases. For the upward configuration, most of the liquid flow through rear part of the header. The liquid distribution improves as the mass flux or quality decreases. The protrusion depth has a minimal effect. Possible explanation is provided from the flow visualization results.

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Pages: ICR07-B1-457

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Details

  • Original title: Two-phase refrigerant distribution in a parallel-flow heat exchanger.
  • Record ID : 2007-2534
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

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