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

NCUIR > Engineering College > Graduate Institute of Mechanical Engineering > journal & Dissertation > Item 987654321/26995

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/26995

Title:	Heat transfer characteristics of reflux condensation phenomena in a single vertical tube
Authors:	Chou,GH;Chen,JC
Contributors:	機械工程研究所
Keywords:	2-PHASE CLOSED THERMOSYPHON
Date:	1997
Issue Date:	2010-06-29 18:05:06 (UTC+8)
Publisher:	中央大學
Abstract:	An analytical study is conducted of condensation heat transfer characteristics under reflux-cooling 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 hear 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.
Relation:	NUCLEAR SCIENCE AND ENGINEERING
Appears in Collections:	[機械工程研究所] 期刊論文

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	407	View/Open

社群 sharing