Introduction to Thermal Energy Storage and Technologies Definition

The decarbonization of the power system as well as mitigation of climate change needs a higher integration of renewable energies as well as higher energy efficiency in the different sectors, which can only be achieved with the use of energy storage. In particular, thermal energy storage (TES) has been identified as a key technology to achieve those goals. TES is a technology where heat (or cold) is charged in a storage device to be used at later time, at different scales, at different temperature between energy source and energy use, at different power energy level, and at different location. TES available technologies are sensible, latent and thermochemical (sorption and chemical reactions) energy storage.