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Étude d'une émulsion de nanoparticules à changement de phase employée en tant que matériau d'accumulation thermique.

Estudio sobre una emulsión que contiene nanopartículas de cambio de fase, como material de almacenamiento de calor.

Auteurs : FUMOTO K., SATO N., KAWAJI M., et al.

Type d'article : Article

Résumé

Recently, a great deal of attention has been paid to energy saving devices in place of conventional air-cooled and water-cooled devices. The thermal energy storage system that uses the latent heat of a phase change material (PCM) for air-conditioning or heating has recently become popular because it does not require high electric power and it saves energy. Therefore, a phase change emulsion (PCE) has been studied for its potential use as a functional fluid in thermal storage systems because of its high-energy storage capacity and transportability. The primary objective of the present study is to experimentally investigate both the heat transfer characteristics and the flow characteristics of the nanoemulsion flowing along a straight pipe. Tetradecane is utilized as the phase change material for the nanoemulsion. Tetradecane, which is type of n-alkane material, has a slightly higher melting point compared with water. Experimental investigation is carried out by considering specific parameters and features such as the nanoemulsion flow velocity, and heat flux of the heated surface. The relationships between the flow characteristics and specific parameters of the nanoemulsion are discussed in detail. As a result, an evaluation of the local heat transfer coefficient and the pressure drop indicate that the distribution of the local heat transfer coefficient and flow characteristics is strongly affected by both the tetradecane concentration and the flow velocity of the nanoemulsion. Moreover, the latent heat of fusion and the melting point of the nanoemulsion are investigated by differential scanning calorimetry (DSC).

Documents disponibles

Format PDF

Pages : 20-27 (7 p.)

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Estudio sobre una emulsión que contiene nanopartículas de cambio de fase, como material de almacenamiento de calor.
  • Identifiant de la fiche : 30012268
  • Langues : Espagnol
  • Source : Frío Calor Aire acondicionado - vol. 42 - n. 471
  • Date d'édition : 07/2014

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