Heat transfer in pool boiling for binary mixtures

An experimental investigation of natural-convection pool-boiling heat transfer for distilled water and binary mixtures (water-ethanol and water-acetone) was carried out at atmospheric pressure. The results obtained indicate that mixture pool-boiling heat transfer is a function of physical properties and is inversely proportional to the vapour-liquid concentration difference. The minimum heat transfer coefficient is obtained at the maximum vapour-liquid concentration difference. This indicates that the heat transfer coefficient for pool boiling of mixtures is lower than the one for distilled water. A developed heat transfer correlation is in good agreement with the experimental results. (orig.)