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Effect of inlet configuration on the two-phase refrigerant distribution in a parallel flow heat exchanger.

Number: pap. A4-096

Author(s) : KIM D. Y., KIM N. H., BYUN H. W., et al.

Summary

The refrigerant R134a flow distribution was experimentally studied for a round header/ten flat tube test section simulating a brazed aluminum heat exchanger. Three different inlet configurations (parallel, normal, vertical) were investigated. Tests were conducted with downward flow for mass flux from 70 to 130 kg/m2.s and quality from 0.2 to 0.6. Tubes were flush-mounted in the test section, with no protrusion into the header. It is shown that normal and vertical inlet yielded similar flow distribution. As mass flux or quality increased, however, better results were obtained for normal inlet configuration. The flow distribution was worst for the parallel inlet configuration. A possible explanation is provided based on flow visualization results.

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Pages: 8 p.

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Details

  • Original title: Effect of inlet configuration on the two-phase refrigerant distribution in a parallel flow heat exchanger.
  • Record ID : 30004701
  • Languages: English
  • Source: ACRA2010. Asian conference on refrigeration and air conditioning: Tokyo, Japan, June 7-9, 2010.
  • Publication date: 2010/06/07

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