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

Author

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

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.

Suggested Citation

  • Arya, Aastha & Mahmoudi, Amirhoushang & Donkers, Pim A.J. & Brem, Gerrit & Shahi, Mina, 2024. "Microstructural changes in thermochemical heat storage material over cycles: Insights from micro-X-ray computed tomography," Renewable Energy, Elsevier, vol. 223(C).
    • Handle: RePEc:eee:renene:v:223:y:2024:i:c:s0960148124001101
    DOI: 10.1016/j.renene.2024.120045
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