NUCLEATE POOL BOILING HEAT-TRANSFER TO BINARY-LIQUID MIXTURES ON PLAIN AND FINNED TUBES

Nucleate pool boiling heat transfer coefficients for boiling of acetone-water binary liquid mixtures of various compositions at atmospheric pressure on a horizontal plain and integral fin (26 fin/in) tubes have been obtained experimentally. The minimum in the heat transfer coefficients is found to occur approximately at 0.15 mole fraction of acetone, irrespective of the heating tube. However, for the boiling of all the compositions of liquid mixture, it is found that the ideal heat transfer coefficient is always greater than the measured heat transfer coefficient for both the tubes. Further, the heat transfer coefficients are always greater for finned tube. The heat transfer coefficients for the plain tube show a good agreement with the correlations of Palen & Small, and Schlunder.