Experimental investigation on heat transfer characteristics of nano enhanced phase change material for heat storage applications

Abstract

The growth of energy utilization, particularly the renewable energy is very much improved using thermal energy storage systems. This results in an increase in energy economy and raising energy competence. There are two types of thermal energy storage system, latent heat storage and sensible heat storage. Latent heat storage which is a storage system that utilizes a materials capability to modify phase at almost steady state temperature, and sensible heat storage which associates the temperature deviation of a material. Latent Heat Thermal Energy Storage (LHS) is a capable method for thermal energy storage. The Thermal Energy Storage (TES) systems would play a main role, as they give great potential for facilitating energy savings and reducing environmental impact. Considering the above said major requirements, the present work is aimed to investigate the studies on the effect of charging and discharging of NaNO3:KNO3(60:40), NaNO3 and KNO3 phase change material in a shell and tube heat exchanger, and by using Differential Scanning Calorimetry (DSC), Thermo gravimetric Analysis (TGA) and Thermal conductivity test to find the thermo physical properties of NaNO3:KNO3 (60:40), NaNO3 , and KNO3 Phase Change Materials (PCMs) with different concentration of Al2O3 and TiO2 nanoparticles. As a first step, a detailed literature survey was carried out on different concepts associated to the current research. The Investigation is mainly focused on the following aspects. (i) Studies on the effect of charging and discharging of NaNO3:KNO3(60:40), NaNO3 and KNO3 phase change material. (ii) Preparation of the phase change material of NaNO3:KNO3(60:0) with the different concentration of nanoparticles Al2O3 and TiO2 and investigate the thermo physical properties. (iii) Preparation of NaNO3 Phase change material with Al2O3 and TiO2 nanoparticles with different concentration and investigate the thermo physical properties. (iv) Preparation of Phase change material of KNO3 with different concentration of nanoparticles Al2O3 and TiO2,