The subject of the present paper is the experimental study of heat transfer through direct contact between three warm liquid petroleum fractions, warm toluene, and cold water. Contact between two immiscible liquids has been made by dispersing drops of either warm liquid petroleum fraction, toluene, in the cold water that represented the continue phase.
Access and exit measurements have been made for each of the liquids brought in direct contact, their flow capacities, the frequency of the formed drops and the amount of time necessary for a drop to reach the contact layer.
The measurements made were necessary for calculating the changed thermal fluxes at the level of each system formed of two immiscible liquids, of toluene or petroleum fraction drop diameter that goes through the layer of water, of heat transfer area between the drops of warm petroleum fraction or toluene and cold water and of global heat transfer coefficient between the drops of warm petroleum fraction or toluene and cold water. These results were correlated while taking into account the influence of physic features of the two immiscible liquids put in direct contact and four criteria relations that shape the heat transfer between the immiscible liquids were obtained.