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Transfert de chaleur lors de l'ébullition des nanofrigorigènes pour le R134a dans un tube horizontal.

Flow-boiling heat transfer of R134a-based nanofluids in a horizontal tube.

Auteurs : HENDERSON K., PARK Y. G., LIU L., et al.

Type d'article : Article

Résumé

The influence of nanoparticles on the flow-boiling of R134a and R134a/polyolester mixtures is quantified for flows of low vapour quality (lower than 20%) over a range of mass fluxes. With direct dispersion of SiO2 nanoparticles in R134a, the heat transfer coefficient decreases (as much as 55%) in comparison to pure R134a. This degradation is, in part, due to difficulties in obtaining a stable dispersion. However, excellent dispersion is achieved for a mixture of R134a and polyolester oil with CuO nanoparticles, and the heat transfer coefficient increases more than 100% over baseline R134a/ polyolester results. In the range of these experiments, nanoparticles have an insignificant effect on the flow pressure drop with the R134a/POE/CuO nanofluid. [Reprinted with permission from Elsevier. Copyright, 2009].

Détails

  • Titre original : Flow-boiling heat transfer of R134a-based nanofluids in a horizontal tube.
  • Identifiant de la fiche : 2010-1394
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 53 - n. 5-6
  • Date d'édition : 02/2010
  • DOI : http://dx.doi.org/10.1016/j.ijheatmasstransfer.2009.11.026

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