Microstructural changes in thermochemical heat storage material over cycles: Insights from micro-X-ray computed tomography

Aastha Arya, Amirhoushang Mahmoudi, Pim A.J. Donkers, Gerrit Brem and Mina Shahi

Renewable Energy, 2024, vol. 223, issue C

Abstract: This paper studies the effect of successive (de)hydration cycles on the structure of potassium carbonate K2CO3·1.5H2O grains for low-temperature heat storage applications. Such structural changes are caused by exposure of the salt to water vapor or removal of water from it, accompanied by successive swelling and shrinkage. Understanding the material's internal structure is key to predicting its behaviour and optimizing its design. However, due to the simultaneous and persistent occurrence of structural changes and transport mechanisms throughout the process, gaining a complete understanding of the phenomenon can be challenging.

Keywords: Thermochemical material; Potassium carbonate; Salt hydrate; Thermochemical energy storage; Micro-computed tomography; Thermogravimetric analysis (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:223:y:2024:i:c:s0960148124001101

DOI: 10.1016/j.renene.2024.120045

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