An experimental study of R-11 and R-12 film condensation on horizontal integral-fin tubes

I. I. Gogonin, O. A. Kabov

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Abstract

Experimental results on heat transfer during film condensation of stationary pure vapor refrigerants R-11 and R-12 on a smooth tube and on four tubes with transverse ribs of constant curvature are reported. The tubes were manufactured in such a way that the fins and valleys had circumferences of the same radius. All tubes were made of brass. The effect of surface curvature on heat transfer was studied. The heat transfer coefficient on the finned tubes (based upon the smooth tube surface area having the diameter of the fin root) increased in all cases. The maximum enhancement being obtained with the tube having the smallest fin radius. Experimental data have been compared with the theoretical models of condensation on the curvilinear surfaces They have also been processed in dimensionless form.

Original languageEnglish
Pages (from-to)43-53
Number of pages11
JournalJournal of Enhanced Heat Transfer
Volume3
Issue number1
Publication statusPublished - 1996

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Keywords

  • Condensation
  • Enhanced heat transfer
  • Finned surfaces
  • Refrigerants
  • Surface tension effect

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Physical and Theoretical Chemistry
  • Mechanical Engineering

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