Heat transfer study on a heat storage container with a phase change material. (Part 2. Heat transfer in the melting process in a cylindrical heat storage container)

Abstract Calcium chloride hexahydrate as a latent-heat storage material is placed in a vertical cylindrical heat storage container, and a vertical single pipe for heat transfer purpose is also inserted in the container. In this setup, the heat transfer rates during melting of the heat storage material are measured. It is shown that heat transfer from the heat transfer pipe to the heat storage material is largely influenced by natural convection at the melting liquid layer section. Also, regarding heat transfer at this melting liquid layer section, a new experimental equation useful for thermal design of heat storage containers has been established.