(in lingua inglese)
A numerical model of the thermal storage system based on one dimensional unsteady two phase energy equations has been developed. The numerical model has been used to study the behaviour of the thermal storage system for various parameters such as the aspect ratio, rock distribution and various mass flow rates. The charging and discharging completion boundary conditions were optimized on the basis of exit air temperature. Further, parametric studies of the aspect ratio and mean particle diameter have been carried out to obtain the performance of the charging and discharging operations including the temperature distribution across the solid and fluid phases.