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Document IIF

Etude sur la stabilité et les propriétés de nanofluides à base d'eau.

Investigation on stability and properties of water-based gold nanofluids.

Numéro : pap. n. TP-042

Auteurs : COLLA L., BLOSI M., SCATTOLINI M., et al.

Résumé

This paper investigates the stability, thermal and transport properties, and convective heat transfer coefficients of water-based nanofluids containing gold (Au) nanoparticles. Nanofluids were prepared with a one-step “eco-friendly” method, which exploits sodium citrate both as the reducing and chelating agents. A Dynamic Light Scattering (DLS) technique was used to measure the diameter of the suspended nanoparticles. Thermal conductivity and dynamic viscosity data for nanofluids with mass concentrations of 0.02 %, 0.05 % and 0.1 % were measured at atmospheric pressure in the temperature range between 10°C and 70°C. In order to evaluate the ability of nanofluids to improve the liquid phase heat transfer efficiency with respect to the base fluid, the convective heat transfer coefficient was experimentally measured in a dedicated experimental set-up. A constant heat flux was supplied to the fluid and the turbulent flow regime was investigated for various flow rates and inlet fluid temperatures, near ambient temperature. The measured thermal conductivity and dynamic viscosity data are used to determine the Reynolds and Nusselt numbers, and the nanofluid heat transfer coefficient coefficients are compared with pure water ones.

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Format PDF

Pages : 298-305

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

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Détails

  • Titre original : Investigation on stability and properties of water-based gold nanofluids.
  • Identifiant de la fiche : 30008115
  • Langues : Anglais
  • Source : 4th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants
  • Date d'édition : 17/06/2013

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