Sunita Routray*, Vishal Agarwal, Ranjita Swain and Rudra Narayan Mohapatro
Phase Change Materials (PCMs) are used in a latent heat storage system for storing thermal energy. The thermal conductivity of PCMs is enhanced by macro encapsulation for large-scale use. This technique not only provides a self-supporting structure of PCM, also separates the PCM from thermal fluids and enhances the heat transfer rate. The current work involves the study of encapsulation of low-cost inorganic PCMs, such as Sodium nitrate (NaNO3), in a temperature range of 300 – 500˚C. Silicate coating is also applied to PCM capsules. A Solar water heater is then designed using the macro encapsulated PCM. The water heater consists of copper cylindrical pipes, filled with the phase change material. The efficiency of the solar water heater is found to be 22.5%.
Phase Change Materials, Thermal Energy Storage, Macro encapsulation, Thermal Conductivity
Department of Mechanical Engineering, C V Raman Global University, Bhubaneswar, , Department of Mechanical Engineering, Vishal Agarwal, C V Raman Global University, Bhubaneswar, , Department of Chemical Engineering, C V Raman Global University, Bhubaneswar, , Rudra Narayan Mohapatro, C V Raman Global University, Bhubaneswar