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Journal of Enhanced Heat Transfer
Impact-faktor: 0.562 5-jähriger Impact-Faktor: 0.605 SJR: 0.211 SNIP: 0.361 CiteScore™: 0.33

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

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Journal of Enhanced Heat Transfer

DOI: 10.1615/JEnhHeatTransf.v8.i2.40
pages 99-118

Enhancement of Condensation Heat Transfer on a Finned Tube Using an Electric Field (Experiment and Modeling Analysis on Enhancement of Heat Transfer Using a Bare Wire Electrode)

Ren Cai C. Chu
Department of Mechanical and System Engineering, Gifu University, 1-1 Yanagito, Gifu-shi, Gifu 501-1193, Japan
Shigefumi Nishio
Key Laboratory of Enhanced Heat Transfe and Energy Conservation, Ministry of Education, School of Chemical and Energy Engineering, South China University of Technology, China; and Institute of Industrial Science and Technology, University of Tokyo, Japan
Ichiro Tanasawa
Department of Mechanical Engineering, Nihon University, 1 Tokusada, Tamura-cho, Kooriyama-shi, Fukushima 963-8642, Japan

ABSTRAKT

A model experiment was conducted to investigate the dynamic behavior of a liquid sheet under an electric field applied parallel to the flow direction. It was confirmed that the liquid sheet was changed into columns when the applied voltage exceeded a certain critical value. A model analysis based on a linear stability theory was then carried out to predict the critical applied voltage, and the analytical results were shown to be in good agreement with the measured values. Further, based on the above-mentioned model describing the dynamic behavior of the liquid sheet, an analytical model predicting the EHD effect on condensation heat transfer for a finned tube is presented. The predicted results are shown to be in good agreement with the experimental data on the flooding angle and the condensation heat transfer coefficient for a finned tube under an electric field.


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