THERMAL ENERGY STORAGE SYSTEM USING PHASE CHANGE MATERIALS – CONSTANT HEAT SOURCE by

The usage of phase change materials to store the heat in the form of latent heat is in-creased, because large quantity of thermal energy is stored in smaller volumes. In the present experimental investigation paraffin and stearic acid are employed as change materials in thermal energy storage system to store the heat as sensible and latent heat also. A constant heat source is used to supply heat transfer fluid at con-stant temperature to the thermal energy storag system. In the thermal energy storag system change materials are stored in the form of spherical capsules of 38 mm di-ameter made of high density poly ethylene. The results of the investigation are re-lated to the charging time and recovery of stored energy from the thermal energy storag system. Key words: phase change material, latent heat, heat transfer fluid, paraffin, stearic acid, thermal energy storage, constant heat sourc