A numerical modeling study on the influence of porosity changes during thermochemical heat storage

Gabriele Seitz, Rainer Helmig and Holger Class

Applied Energy, 2020, vol. 259, issue C

Abstract: Thermochemical energy storage can achieve high storage densities as well as nearly loss-free long-term storage, while offering charge or discharge on demand. Suitable materials consist of solid and gaseous components, where the dosage of reacting gas in the reactor can easily be regulated to control the reaction. Most materials currently investigated for thermochemical heat storage feature a volume change of the solid reactive material during the reaction. To study this effect and its influence on the reaction performance, we present a numerical model that can capture the changing hydraulic properties of the solid reactor fill, represented by the parameters porosity and permeability. This model is applied to a quasi-1D setup for the reaction system CaO/Ca(OH)2.

Keywords: Porosity-permeability relationship; Thermochemical heat storage; Calcium oxide/hydroxide; Porous media; Dumux (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:259:y:2020:i:c:s0306261919318392

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DOI: 10.1016/j.apenergy.2019.114152

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