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Journal of Enhanced Heat Transfer
IF: 1.406 5-Year IF: 1.075 SJR: 0.287 SNIP: 0.653 CiteScore™: 1.2

ISSN Print: 1065-5131
ISSN Online: 1026-5511

Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v1.i2.100
pages 211-217

Enhancement of Condensation Heat Transfer on Integral-Fin Tubes Using Radiused Fin-Root Fillets

X.-L. Wen
Department of Mechanical Engineering, Queen Mary and Westfield College University of London, Mile End Road London, U.K., El 4NS
Adrian Briggs
School of Engineering and Materials Science, Queen Mary, University of London, London E1 4NS, UK
John W. Rose
School of Engineering and Materials Science, Queen Mary, University of London, London E1 4NS, UK

ABSTRACT

The paper presents the latest experimental data in a continuing investigation into condensation on horizontal, integral-fin tubes. The effect of radiused fillets at the roots of rectangular-section fins has been investigated. Theory suggested that, for a high conductivity tube, fillets should enhance the heat transfer by preventing retention of condensate in the corners at the base of the fins on the upper "unflooded" part of the tube. Three condensing fluids were used, namely, steam, ethylene glycol and R-113. Vapour-side, heat-transfer coefficients were obtained from accurately measured overall heat-transfer coefficients using a modified Wilson plot. Radiused fillets at the fin root were found to increase the vapour-side, heat-transfer coefficient, the enhancing effect increasing with the surface tension of the condensate.


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