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Matériaux à changement de phase et stockage d'énergie : performance thermique du trihydrate d'acétate de sodium épaissi à l'aide de différentes substances.

Thermal performance of sodium acetate trihydrate thickened with different materials as phase change energy storage material.

Auteurs : CABEZA L. F., SVENSSON G., HIEBLER S., et al.

Type d'article : Article

Résumé

The use of phase change materials (PCMs) in energy storage has the advantage of high energy density and isothermal operation. Although the use of only non-segregating PCMs is a good commercial approach, some desirable PCM melting points do not seem attainable with non-segregating salt hydrates at a reasonable price. The addition of gellants and thickeners can avoid segregation of these materials. In the research described, sodium acetate trihydrate was successfully thickened with bentonite and starch. Cellulose gave an even better thickened PCM, but temperatures above 65 °C gave phase separation. The mixtures would show a similar thermal behaviour as the salt hydrate, with the same melting point and an enthalpy decrease between 20% and 35%, depending on the type and amount of thickening material used.

Détails

  • Titre original : Thermal performance of sodium acetate trihydrate thickened with different materials as phase change energy storage material.
  • Identifiant de la fiche : 2004-0515
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 23 - n. 13
  • Date d'édition : 09/2003

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