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Condensation heat transfer of R22 and R410A in horizontal smooth and microfin tubes.

Author(s) : KIM M. H., SHIN J. S.

Type of article: Article, IJR article

Summary

An experimental investigation of condensation heat transfer in 9.52 mm O.D. horizontal copper tubes was conducted using R22 and R410A. The test rig had a straight, horizontal test section with an active length of 0.92 m and was cooled by the heat transfer fluid (cold water) circulated in a surrounding annulus. Constant heat flux of 11.0 kW/m2 was maintained throughout the experiment and refrigerant quality varied from 0.9 to 0.1. The condensation test results at 45 °C were reported for 40-80 kg/h mass flow rate. The local and average condensation coefficients for seven microfin tubes were presented compared to those for a smooth tube. The average condensation coefficients of R22 and R410A for the microfin tubes were 1.7-3.19 and 1.7-2.94 times larger than those in smooth tube, respectively.

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Pages: 949-957

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Details

  • Original title: Condensation heat transfer of R22 and R410A in horizontal smooth and microfin tubes.
  • Record ID : 2005-2467
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 28 - n. 6
  • Publication date: 2005/09

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