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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

Heat Transfer Characteristics of Condensation of Vapor on a Lyophobic Surface

Get access (open in a dialog) DOI: 10.1615/IHTC10.670
pages 401-406

Abstract

When the vapor condenses on a lyophobic surface, the aspect of condensation shifts from dropwise to film condensation with increasing cooling intensity. The condensation curve, which shows the change of the heat flux against the surface subcooling, exhibits the characteristic N-shape. In order to understand the characteristics of the condensation curve, the local heat transfer quantities for ethylene glycol vapor under various vapor temperatures and velocities were measured and the aspect of condensate were observed by using a relatively long heat transfer surface associate with the effect of the condensate flow. Based on the results obtained from this experiment and the previous one for propylene glycol vapor, the dependencies of the peak heat flux on the position on the hea t transfer surface and the quantitative relations among the basic parameters controlling the characteristics of local condensation curve were clarified.