A Critical Review of Thermochemical Energy Storage Systems

Abstract

Thermal energy storage (TES) is an advanced technology for storing thermal energy that can mitigate environmental impacts and facilitate more efficient and clean energy systems. Thermochemical TES is an emerging method with the potential for high energy density storage. Where space is limited, therefore, thermochemical TES has the highest potential to achieve the required compact thermal energy storage. Thermochemical TES is presently undergoing research and experimentation. In order to develop an understanding of thermochemical TES systems and to improve their implementation, comprehensive analyses and investigations are required. Here, principles of thermochemical TES are presented and thermochemical TES is critically assessed and compared with other TES types. Recent advances are discussed.

Thermoelectric cooling in combination with photovoltaics and thermal energy storage

“…[2] The principle of TES is based on an increase in temperature (sensible TES) or change of phase (latent TES). Starting with an initial solid state, heat addition to the substance first causes sensible heating of the solid, followed by a solid-to-liquid phase change, a sensible heating of the liquid, a liquid-to-vapor phase change and a sensible heating of the vapor.…”

“…This is the reason why latent heat storage is one of the most efficient ways of storing thermal energy. [6] The amount of energy is determined by the enthalpy value during the phase change, in the solid state and in the liquid state, according to the following equation (2).…”

Review of Thermal Materials for CSP Plants and LCOE Evaluation for Performance Improvement using Chilean Strategic Minerals: Lithium Salts and Copper Foams

“…However, TCS has not been extensively studied due to its weak long-term durability, weak chemical stability and complicated reactors for the specific chemical reactions. Within a TCS, thermal energy can be stored by sorption processes or chemical reactions [18].…”

Long-Term Durability and Reactivation of Thermochemical Heat Storage Driven by the CaO/Ca(OH)<sub>2</sub> Reversible Reaction

“…Thermochemical heat storage systems have a high potential for energy saving owing to their high heat storing capacity and low heat loss [1] [2]. The chemical system explored in this study is based on the CaO/Ca(OH) 2 reversible reaction, as shown in Equation (1), which involves low cost and environmentally friendly materials.…”

“…The chemical system explored in this study is based on the CaO/Ca(OH) 2 reversible reaction, as shown in Equation (1), which involves low cost and environmentally friendly materials. As this reaction can theoretically store heat at over 400˚C and release it at the same or higher level, it is suitable for high-temperature applications, How to cite this paper: Kuwata, K., Esaki, T., Iwase, D., Ito, H., Li, S.J., Yang, X.X.…”