| Título |
Sodium acetate-based thermochemical energy storage with low charging temperature and enhanced power density |
| Autores |
ARCENEGUI TROYA, JUAN JESÚS, Lizana J. , Sánchez-Jiménez P.E. , Perejón A. , Vañes-Vallejo A. , Pérez-Maqueda L.A. |
| Publicación externa |
No |
| Medio |
Journal of Energy Storage |
| Alcance |
Article |
| Naturaleza |
Científica |
| Cuartil JCR |
1 |
| Cuartil SJR |
1 |
| Web |
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85188542957&doi=10.1016%2fj.est.2024.111310&partnerID=40&md5=de0f920201d89ac5edcb315c86085e0d |
| Fecha de publicacion |
01/01/2024 |
| ISI |
001218197600001 |
| Scopus Id |
2-s2.0-85188542957 |
| DOI |
10.1016/j.est.2024.111310 |
| Abstract |
The electrification of heat necessitates the development of innovative domestic heat batteries to effectively balance energy demand with renewable power supply. Thermochemical heat storage systems show great promise in supporting the electrification of heating, thanks to their high thermal energy storage density and minimal thermal losses. Among these systems, salt hydrate-based thermochemical systems are particularly appealing. However, they do suffer from slow hydration kinetics in the presence of steam, which limits the achievable power density. Additionally, their relatively high dehydration temperature hinders their application in supporting heating systems. Furthermore, there are still challenges regarding the appropriate thermodynamic, physical, kinetic, chemical, and economic requirements for implementing these systems in heating applications. This study analyzes a proposal for thermochemical energy storage based on the direct hydration of sodium acetate with liquid water. The proposed scheme satisfies numerous requirements for heating applications. By directly adding liquid water to the salt, an unprecedented power density of 5.96 W/g is achieved, nearly two orders of magnitude higher than previously reported for other salt-based systems that utilize steam. Albeit the reactivity drops as a consequence of deliquescence and particle aggregation, it has been shown that this deactivation can be effectively mitigated by incorporating 10 % silica, achieving lower but stable energy and power density values. Furthermore, unlike other salts studied previously, sodium acetate can be fully dehydrated at temperatures within the ideal range for electrified heating systems such as heat pumps (40 °C 60 °C). The performance of the proposed scheme in terms of dehydration, hydration, and multicyclic behavior is determined through experimental analysis. © 2024 The Authors |
| Palabras clave |
Agglomeration; Dehydration; Electric utilities; Heat storage; Hydrates; Silica; Sodium compounds; Temperature; Thermal energy; Balance energies; Heating applications; Heating system; Liquid water; Power densities; Salt hydrates; Sodium acetate; Thermal energy storage; Thermochemical energy storage; Thermochemical storage; Hydration |
| Miembros de la Universidad Loyola |
|
Gestionar cookies