Review on influence of nanomaterials on thermal energy storage methods

Abstract

Thermochemical heat and latent heat storage are two promising methods for thermal energy storage (TES) that have the potential to increase energy efficiency and sustainability. Due to its vast advantages, TES systems have found application in numerous waste heat sources such as solar plants, automobiles, and industries. Despite their benefits, both storage technologies have their limitations. The use of nanomaterials in latent and thermochemical heat storage has improved results in terms of improving heat storage performance and overcoming limitations. This paper discusses the role of various potential nanomaterials such as expanded Graphite, Aluminium Oxide, Titanium Oxide, Silicone, Graphene, Carbon Nanotubes, and Nanofibers in efficient thermal energy storage. The aim of the present study to explores the effects of various nanomaterials on storage methods and their utilization. The addition of TiO2-based nanoparticles in the CaO thermochemical material increased heat storage density and the cyclic stability of the heat storage system. The latent heat capacity of Wax PCM increased by adding 1 % of TiO2 into the paraffin. The addition of nanomaterials significantly improved the energy storage parameters such as thermal conductivity, thermal stability, thermal reliability, specific heat capacity, heat storage density and cyclic stability of the thermal energy storage materials.