Dynamic SEM study and analysis of the heat storage phase change transitions to foster the development of new advanced ones.

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Authors

Philippe Legros¹ , Samia Ben Ali-Aoun Ben Ali-Aoun² , Fouzia Achchaq³

1. CNRS
2. ENIG
3. University of Bordeaux

Conference / event

Materials World 2024-Materials Science 1 Engineering, Scientifilink., May 2024 (Dubaï, United Arab Emirates)

Poster summary

Phase change materials (PCMs) are widely studied for their ability to store/release thermal energy in a more efficient way than sensible heat materials. Yet, the deploiement of heat storage systems in the market is still very low, particularly for mid- and high temperature applications. In situ and real time Scanning Electron Microscopy (SEM) experimentations have been performed in this work to deepen the knowledge related to the thermal behaviours of PCMs, to their reversible solid ⇄ solid and solid ⇄ liquid transitions, and then to their impacts in the synthesis of new advanced materials. The velocities of the phase change propagation fronts for two different nature of PCMs (a fossil-based paraffin and an inorganic salt), at microscale, were calculated by image processing. To this date, these results of utmost importance regarding the final performance of the PCM have never been given in literature.

Keywords

Alkali metal hydroxide, Paraffin RT60, Microscale, Phase transitions, Propagation fronts velocities, Ultra-compact TES

Research areas

Material Sciences, Energy Engineering

References

1. P. Legros, E. Lebraud, F. Achchaq, “Li4Br(OH)3microstructure monitoring over its synthesis to tackle the lithium-based salts exploitation challenges as advanced phase changematerials for storage technologies”, Materials & Design, 2020. https://doi.org/10.1016/j.matdes.2020.109160
2. - F.Achchaq,S.-C. Moon, P.Legros, “Unlocking thepowerofLiOH:Keytonext-generation ultra-compact thermal energy storage system”, Heliyon-Cell Press, 2024.Submitted

Funding

No data provided

Supplemental files

No data provided

Additional information

Competing interests

No competing interests were disclosed.

Data availability statement

The datasets generated during and / or analyzed during the current study are available from the corresponding author on reasonable request.

Creative Commons license

Copyright © 2024 Legros et al. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.