Heat transfer characteristics of reflux condensation phenomena in a single vertical tube

Gung Huei Chou, Jyh Chen Chen

研究成果: 雜誌貢獻期刊論文同行評審

2 引文 斯高帕斯(Scopus)

摘要

An analytical study is conducted of condensation heat transfer characteristics under refluxcooling modes with both constant temperature and constant heat flux (CHF) at the inner wall of a single vertical tube. The effects of interfacial shear stress and convection on the reflux condensation heat transfer are examined analytically. The results indicate that interfacial shear retards the condensate flow and thickens the liquid film layer, which in turn decreases the condensation heat transfer coefficient (HTC). The dimensionless film thickness and local HTC with zero convection varies with an increase in the interfacial shear and has a remarkable effect on the condensation process, especially with a larger condensation length. However, the film Reynolds number has the opposite effect. Additionally, the interfacial shear thickens the film and retards the liquid flow relatively more distinctly for the CHF case. Finally, compared with the experimental data from previous study, the observed trend of the condensation heat transfer can be reasonably described by the present model at moderate film Reynolds numbers.

原文???core.languages.en_GB???
頁(從 - 到)220-229
頁數10
期刊Nuclear Science and Engineering
127
發行號2
DOIs
出版狀態已出版 - 10月 1997

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