Generalized Prediction of Heat Transfer during Subcooled Boiling in Annuli

摘要

A general correlation for heat transfer during subcooled boiling in tubes was compared with a large amount of varied data for boiling in cylindrical annuli. The data include the fluids water, R-113, and methanol; mass fluxes from 2 78 to 7774 kg/m1s; heat fluxes from 0.03 to 4.4 MW/m2; liquid subcooling from 2 to 109#xB0;C; and reduced pressures from 0.009 to 0.89. The inner tube diameter varied from 4.5 to 42.2 mm and the annular gap from 1 to 6.6 mm. The data include heating of the inner, outer, and both tubes of the annuli. The 450 representative data points from all studies are correlated with a mean deviation of 8.9.