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| Hauptseite > Publikationsdatenbank > Calcium Chloride and Calcium Fluoride Molten Salts for High Temperature Thermal Energy Storage |
| Hauptseite > Publikationsdatenbank > Calcium Chloride and Calcium Fluoride Molten Salts for High Temperature Thermal Energy Storage |
| Conference Presentation (After Call) | FZJ-2022-02816 |
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2022
Abstract: The storage of excess or unutilised energy generated by renewables remains a key unsolved piece in the decarbonisation of the energy sector. One potential way to solve this is through the use of thermal energy storage which can use the heat as is (e.g. in concentrated solar power systems) or through the conversion of electricity to heat (e.g. through resistive heating) at very low costs. To achieve these low costs, high storage densities and low-cost materials should be utilised. A potential way to achieve this is by harnessing the energy released during phase change in appropriate materials such as molten salts. Two such materials worthy of investigation are calcium chloride or calcium fluoride. As pure salts these materials have high melting points (772 °C and 1418 °C, respectively) and high latent heats (253 J/g and 381 J/g, respectively) making them an interesting storage material option. Furthermore, the combination of these materials forms a eutectic and a peritectic which have been predicted to have melting temperatures above 600 °C and high heats of fusion. Therefore, the current study investigates the solid/liquid phase diagram of these two low cost salts (calcium chloride and calcium fluoride) and their mixtures and assesses their feasibility for use as high temperature storage options.
Keyword(s): Energy (1st)
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