Abstract
In this paper, droplet behavior due to direct contact heat transfer between two immiscible liquids including evaporation of droplet and freezing of bulk liquid has been investigated experimentally and theoretically, using R134a droplet in ethylene glycol water solution. The behavior of a droplet with its evaporation and freezing of bulk liquid depends on the initial diameter and the dimensionless temperature, and it is divided into five types, based on the evaporation types and the freezing types. The behavior of the droplet including freezing depends on the freezing type divided into partial freezing and perfect freezing. Heat transfer in perfect freezing becomes lower than that in partial freezing because the freezing layer occurring in perfect freezing reduces the liquid-liquid direct heat transfer having a higher heat transfer coefficient.
