Improved correlation for heat transfer during condensation in mini and macro channels

An improved version of the present author's earlier correlation for heat transfer during condensation in conventional and mini channels is presented. It has been validated by comparison with a database that includes 51 fluids (water, refrigerants, chemicals, cryogens), diameters 0.08 to 49.0 mm, reduced pressures 0.0 0 06 to 0.949, mass flux from 1.1 to 1400 kgm -2 s -1 , various shapes (round, rectangular, triangular, etc.), single and multi-channels, annuli, horizontal and vertical downflow. The data are from 130 sources. The improved correlation predicts 8298 data points with mean absolute deviation (MAD) of 17.9 %. The same data are also compared to other correlations. Their deviations are much greater. (c) 2022 Elsevier Ltd. All rights reserved.

Automated summary

An improved correlation for heat transfer during condensation in conventional and mini channels is proposed and validated with a large amount of data.