Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1549964 | Solar Energy | 2014 | 12 Pages |
Abstract
Thermal energy storage (TES) is a key factor for increasing the efficiency of concentrated solar power plants. TES using a reversible chemical reaction appears to be a promising technology for high energy density thermal storage (100-500 kW h mâ3), at high temperature (up to 1000 °C) and during a long period (24 h to several months). This paper details an experimental study to carry out the reversible reaction Ca(OH)2(s) + ÎHr â CaO(s) + H2O(g) in a fluidized bed (FB) reactor. The 4 μm Ca(OH)2 powder fluidization has been performed with an appropriate proportion of inert easy-to-fluidize particles. Then, Ca(OH)2 dehydration and CaO hydration have been implemented in a FB reactor and 50 cycles have been reached. The mean energy density obtained is 60 kW h mâ3 solid_mixture which amounts to a promising energy density of 156 kW h mâ3 Ca(OH)2-bulk if the reactants and the easy-to-fluidize particles are separated. The results demonstrated the feasibility of the implementation of the Ca(OH)2/CaO thermochemical heat storage in a fluidized bed reactor.
Related Topics
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Renewable Energy, Sustainability and the Environment
Authors
P. Pardo, Z. Anxionnaz-Minvielle, S. Rougé, P. Cognet, M. Cabassud,