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Amélioration de la conductivité thermique et de la performance de transfert de chaleur de matériaux à changement de phase (PCM) contenant des additifs de carbone pour une application d'accumulation thermique.

Thermal conductivity and heat transfer performance enhancement of phase change materials (PCM) containing carbon additives for heat storage application.

Auteurs : CHOI D. H., LEE J., HONG H., et al.

Type d'article : Article, Article de la RIF

Résumé

In thermal storage system, a high thermal conductivity of Phase Change Materials (PCM) is required to complement the crystallization phenomenon of the PCM during the discharging process. In this study, PCM with carbon additives, Multi-walled Carbon nanotube, Graphite and Graphene, are manufactured and the thermal conductivity of the PCM is measured by the transient hot-wire method for thermal storage application. The thermal conductivity of the PCM is enhanced by adding the carbon additives, and the effect of Poly Vinyl Pyrrolidone (PVP) as a dispersion stabilizer on the thermal conductivity is evaluated. It is found that the heat transfer rate enhances up to 3.35 times in the case of Graphite at 5.0 vol%. It is finally concluded that Graphite is the most promising candidate for heat transfer enhancement of stearic acid among three carbon additives even though Graphene gives the highest thermal conductivity enhancement.

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Format PDF

Pages : 112-120

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    20 €

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    Gratuit

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Détails

  • Titre original : Thermal conductivity and heat transfer performance enhancement of phase change materials (PCM) containing carbon additives for heat storage application.
  • Identifiant de la fiche : 30011438
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 42
  • Date d'édition : 06/2014

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