Abstract
Two-phase flow boiling heat transfer of water in a horizontal small diameter tube, ID=0.9 mm, was experimentally examined at an atmospheric pressure condition in a range of mass flux from 120 to 360 kg/m^2s. Predicted pressure drop was within an error of 30%, when a critical Reynolds number is selected to be 3000. However, more adequate model for calculating acceleration loss is necessary to make better pressure drop prediction at a higher heat flux. The effect of mass flux and location on the heat transfer coefficient was small. CHF can be predicted within an error of 20% by the Katto's correlation.
