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Document IIF

Étude du transfert de chaleur et de la rhéologie d’une émulsion de matériaux à changements de phase hautement concentrée en tensioactif.

Investigation of heat transfer and rheology of a phase change material emulsion with a high concentration in surfactant.

Numéro : pap. 0025

Auteurs : VASILE V., BADEA A., NECULA H., et al.

Résumé

The thermohydraulic characteristics of a secondary refrigerant consisting of a phase change material emulsion (PCME) were investigated. This PCME is a paraffin-in-water emulsion containing 30 wt.% of paraffin and a relatively high concentration of surfactant (5 wt.%). A fully instrumented 1 m long rectangular channel was used to conduct heat transfer experiments. Heat transfer coefficients during cooling inside the rectangular channel were determined. Furthermore, a specific test rig was used to perform experiments on the rheological behavior. Tests were carried out using a pipe viscosimeter at different temperatures for laminar flow. The stability of the emulsion was examined under thermal-mechanical loads. The experiments revealed a shear thinning behavior. Phase change of the PCM droplets was confirmed for high Reynolds number, while for low Reynolds number, the phase change remains uncertain. In addition, results showed a large supercooling degree and a very good stability but viscosity was found to be quite high.

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Format PDF

Pages : 190-197

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    20 €

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Détails

  • Titre original : Investigation of heat transfer and rheology of a phase change material emulsion with a high concentration in surfactant.
  • Identifiant de la fiche : 30023792
  • Langues : Anglais
  • Source : 12th IIR Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Orford, Canada, May 21-23, 2018.
  • Date d'édition : 21/05/2018
  • DOI : http://dx.doi.org/10.18462/iir.pcm.2018.0025

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