A general modeling for heat transfer during reflux condensation inside vertical tubes surrounded by isothermal fluid

Gung Huei Chou, Jyh Chen Chen

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

An analytical modeling of condensation heat transfer characteristics under reflux cooling mode inside vertical tubes surrounded by isothermal external fluid was conducted in the present work. The dimensionless film thickness, film Reynolds number as well as the heat transfer coefficient in the condensate were formulated and calculated numerically. The results indicate that the increase in Biot number thickens the film layer, speeds the film Reynolds number, and increases the condensation heat transfer coefficient. As Bi >> 1 and Nu = 1, the limiting cases for both isothermal wall and uniform wall heat flux, respectively, were derived for comparison. As compared with the experimental data of reflux condensation from previous studies, the analytical results show good agreement with the observed trend of the condensation heat transfer.

Original languageEnglish
Pages (from-to)2299-2311
Number of pages13
JournalInternational Journal of Heat and Mass Transfer
Volume42
Issue number12
DOIs
StatePublished - 1 Jun 1999

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