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Amélioration de la conductivité thermique d'un mélange binaire (NH3 + LiNO3) grâce à l'ajout de nanotubes [de carbone].

Thermal conductivity enhancement of the binary mixture (NH3 + LiNO3) by the addition of CNTs.

Auteurs : CUENCA Y., VERNET A., VALLÈS M.

Type d'article : Article, Article de la RIF

Résumé

The objective of this paper is to experimentally investigate the enhancement of thermal conductivity in the binary working pair (NH3 + LiNO3) by adding carbon nanotubes (CNTs). A stable distribution of CNTs in the base fluid is achieved by surface modification of CNTs through oxidation. The key parameters are the concentrations of NH3 and CNTs in weight, ranging from 30% to 50% for NH3, and 0.005%–0.2% for CNTs. The thermal conductivity of the binary nanofluid was measured at 1.5 MPa, from 303.15 K to 353.15 K, using a relative transient hot-wire apparatus. Uncertainty in the measurements was estimated to be less than 0.025 W m-1 K-1. The highest thermal conductivity enhancement was obtained with the combination of 0.01 wt.% of CNTs in the base fluid of 40 wt.% NH3, where the maximum measured enhancements was 7.5% times than that of NH3 + LiNO3 solution.

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Format PDF

Pages : 113-120

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    20 €

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Détails

  • Titre original : Thermal conductivity enhancement of the binary mixture (NH3 + LiNO3) by the addition of CNTs.
  • Identifiant de la fiche : 30011085
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 41
  • Date d'édition : 05/2014

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