ABSTRACT

Convective vaporization of liquid mixtures is characterized by the decline of heat-transfer, which depends on the mixture composition. As the total heat-transfer is a function of the convective evaporation and the nucleate flow boiling components, the effect of liquid composition and the other variables of each mechanism have been analysed in this article. The analysis has been performed to identify the fundamental changes in convective vaporization of mixtures compared to convective vaporization of the pure components. Additionally, it has been observed that a high ratio of heat flux to mass velocity reduces the heat-transfer coefficient of the nucleate flow boiling component. In this case it is possible that the convective evaporation component gives significantly higher heat-transfer coefficients. Therefore, a remarkable amount of the decline of heat-transfer at flow vaporization can be reduced by using sufficiently high mass velocities.