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Experimental study of two-phase adiabatic flow distribution in small-channel heat exchangers.

Author(s) : POGGI F., MACCHI-TEJEDA H., MARECHAL A., et al.

Summary

Small-channel heat exchangers are widely used for car air conditioning. However, information about their behaviour remains scarce. An experimental device was built to characterize the distribution of two-phase flows in a small-channel heat exchanger and to measure the singular and regular pressure losses. Both were studied with horizontal flow and vertical down-flow through the header. A transparent polycarbonate test section comprised a 16-mm diameter header connected to 8 multi-port flat tubes. The mass flux range was between 15 and 650 kg/(m2.s) in the manifold and between 100 and 3000 kg/(m².s) in the small channels. The range of vapour quality values at the test section inlet was between 0.1 and 0.9. The two-phase refrigerant was condensed at the outlet of each flat tube in order to measure each flow rate separately. The refrigerant distribution was studied in single and two-phase flows. The pressure losses were measured.

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Pages: ICR07-B1-647

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Details

  • Original title: Experimental study of two-phase adiabatic flow distribution in small-channel heat exchangers.
  • Record ID : 2007-2512
  • 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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