Improved correlation for heat transfer during condensation in conventional and mini/micro channels

•Presents correlation for condensation heat transfer in mini and macro channels.•Verified with data for horizontal and vertical channels, round and of other shapes.•Included are 43 fluids (water, halocarbon & natural refrigerants, chemicals).•Verified with 5100 data points from182 data sets from...

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Bibliographic Details
Published in:International journal of refrigeration 2019-02, Vol.98, p.222-237
Main Author: Shah, Mirza M.
Format: Article
Language:English
Subjects:
Channels
Condensation
Correlation
Correlation analysis
Corrélation
Data points
Fluid dynamics
Heat transfer
Macro-canaux
Macro-channels
Mini-channels
Minicanaux
Transfert de chaleur
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Summary:•Presents correlation for condensation heat transfer in mini and macro channels.•Verified with data for horizontal and vertical channels, round and of other shapes.•Included are 43 fluids (water, halocarbon & natural refrigerants, chemicals).•Verified with 5100 data points from182 data sets from 88 sources.•Mean absolute deviation of correlation 18.2%, much better than other correlations. An improved version of author's earlier correlation for heat transfer during condensation in conventional (macro) and mini/micro channels is presented. It has been validated by comparison with a database that includes 40 fluids, diameters 0.08 to 49.0 mm, reduced pressures 0.0008 to 0.946, mass flux from 1.1 to 1400 kgm−2s−1, various shapes (round, rectangular, triangular, etc.), horizontal and vertical downflow. There are 182 data sets from 88 sources. The improved correlation predicts 5100 data points with mean absolute deviation (MAD) of 18.2%. The same data are also compared to other correlations. Their deviations are much greater.
ISSN:0140-7007
1879-2081
DOI:10.1016/j.ijrefrig.2018.07.037