Thermal Energy Release Characteristics of Latent Microcapsules-Water Mixture under the Heat Storage Condition by Air Bubbles

Abstract

This paper has dealt with the thermal energy release characteristics of fine latent thermal energy storage particles encapsulated into micro-capsules in a water solution by air bubbles as heat transfer medium by means of direct contact heat exchange. The micro-capsules consisted of n-paraffin as latent heat storage material and melamine resin as capsule material. The temperature effectiveness, the amount of heat released from latent heat storage particles and completion time of latent heat release process were measured over the wide ranges of inlet air temperature, humidity and flow rate, and the amount of latent heat storage particles packed in a heat storage vessel. As a result, nondimensional correlation equations of the temperature effectiveness, enthalpy difference between inlet and outlet air, and completion time of latent heat release process had been derived in terms of some nondimensional experimental parameters.