Correlation for CHF during subcooled flow across a single cylinder.

• Presents new correlation for CHF during subcooled flow across a cylinder. • New correlation gives good agreement with all published test data. • Data are from five sources, include five fluids and diameters 0.25 o 19.1 mm. • Other published correlations give large deviations with the same data. • This correlation will be useful in design of evaporators/boilers with crossflow. A correlation is presented for prediction of CHF (critical heat flux) during upward flow of subcooled liquids across single cylinders. The correlation was verified against all available published test data. It includes five fluids (water, R-12, R-113, isopropanol, FC-72), tube diameter 0.25 – 19.1 mm, reduced pressure 0.0046 – 0.3554, liquid velocities 0.01 – 6.8 m/s, CHF 0.14 – 28.7 MW/m2, and quality −0.001 to −0.34. The new correlation predicts 496 data points from 28 data sets from 12 sources with mean absolute deviation (MAD) of 16.4%. The same data were also compared to other published correlations; their MAD ranged from 47% to 319.0%. [ABSTRACT FROM AUTHOR]