Evaluation of Convective Heat Transfer Coefficient for Pool Boiling of Milk Under Closed Condition

Abstract

This research paper reports the study on heat and mass transfer during pool boiling of milk in an aluminum pan under closed conditions. Various indoor experiments were conducted for different heat inputs varying from 240 to 360 W. During heating of milk the evaporated water was condensed at the inner surface of the condensing cover and collected as fresh water. Experimental data were analyzed by using Rohsenow pool boiling correlation with the help of simple linear regression analysis. The convective heat transfer coefficients were estimated in the range of 186.32 to 567.56 W/m2 oC for the heat inputs varying from 240 to 360 W. The nucleate boiling heat flux was observed to increase exponentially with the increase in excess temperature. The experimental errors in terms of percent uncertainty were also evaluated.