Document IIF

Sous-refroidissement des émulsions d'hexadécane.

Subcooling in hexadecane emulsions.

Auteurs : GÜNTHER E., SCHMID T., MEHLING H., et al.

Type d'article : Article, Article de la RIF

Résumé

When a liquid starts to solidify only when cooled well below its melting temperature, this is called subcooling. From nucleation theory, subcooling is expected to increase for small volumes due to statistics and seed isolation effects. PCM emulsions are superior in their heat transfer rates compared to larger PCM modules. In principle, the smaller the droplets, the larger is the risk for significant subcooling. Due to the limitations of theoretic models, it is necessary to use experimental investigations to predict from what droplet size on subcooling becomes problematic in a PCM. In this paper, the authors present an experimental study on subcooling in hexadecane emulsions. Different hexadecane-water-surfactant systems with droplet size in the range of about 0.1-20 micrometers were prepared and analyzed. The authors have observed an increased subcooling of at least 10 K for small droplets. The surfactants also have an impact on the melting and solidification temperatures.

Documents disponibles

Format PDF

Pages : pp. 1605-1611

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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

Détails

  • Titre original : Subcooling in hexadecane emulsions.
  • Identifiant de la fiche : 2010-1914
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 33 - n. 8
  • Date d'édition : 12/2010

Liens


Voir d'autres articles du même numéro (20)
Voir la source