Optimisation of Parameters in Thermal Energy Storage System by Enhancing Heat Transfer in Phase Change Material

Abstract

Phase change material (PCM) is used to store the heat in the form of latent heat and sensible heat. Thermal energy storage by latent heat using PCM was recognized as attractive alternative to sensible heat storage, because large quantity of thermal energy is stored in small volume. In the present experimental analysis, Beeswax is used as PCM and it is enclosed in stainless steel capsules. Beeswax exhibits slow thermal response due to low thermal conductivity value, so an effort is made to dope PCM with copper, aluminium and graphite powders separately to enhance its heat transfer. The capsules are stored in insulated tank and hot water is supplied into it. The experimental design is prepared by considering parameters as Heat transfer fluid inlet temperatures, Flow rate and Number of Capsules. Experiments are conducted based on Taguchi analysis and the responses are recorded. The effect of considered parameters on Thermal Energy Storage (TES) system is studied by analyzing experimental data to find the optimal parameters for designing the effective TES system.