Direct-contact condensation of pure steam on co-current and counter-current stratified liquid flow in a circular pipe

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We carried out a set of experiments on the direct-contact condensation of atmospheric steam for subcooled water flowing co-currently and counter-currently in a circular pipe. The condensation heat transfer coefficient was evaluated both for co-current and counter-current steam-water flow cases in a horizontal circular pipe. In the current experiment the dependency of the liquid Nusselt number on the gas Reynolds number is higher in the counter-current than in the co-current experimental data. The dependency of the liquid Nusselt number on the steam Reynolds number is stronger in the rectangular channel than in the circular pipe. The overall heat transfer characteristics are better in the co-current flow than in the counter-current flow with the same injection flow rates of the steam and the water. The present co-current experimental data were used to assess four existing correlations. However, there are few reliable correlations existing to predict co-current experimental data. The comparisons of the present counter-current experimental data with the existing correlations show that Chu's (Chu, I.C., Yu, S.O., Chun, M.H. 2000. Interfacial condensation heat transfer for counter-current steam-water stratified flow in a circular pipe, J. Korea Nucl. Soc., 32 (2), 142-156) correlation predicts the experimental data well. (C) 2008 Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2009-02
Language
English
Article Type
Article
Keywords

WATER

Citation

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v.52, no.5-6, pp.1112 - 1122

ISSN
0017-9310
DOI
10.1016/j.ijheatmasstransfer.2008.08.033
URI
http://hdl.handle.net/10203/100923
Appears in Collection
NE-Journal Papers(저널논문)
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