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Mesures du transfert de chaleur par convection du CO2 en ébullition à l'intérieur de petits tubes horizontaux à basse température.

Heat transfer convection measurements of boiling CO2 in small horizontal tubes at low temperature.

Numéro : pap. ID: 711

Auteurs : ORIUNNO M., HEMINK G.

Résumé

The authors measured the heat transfer coefficients of boiling carbon dioxide (CO2) in small horizontal tube for temperatures ranges below 0°C. The tubes have an inner diameter of 1.6 mm and 2.16 mm with wall thickness of 280 and 305 µm, respectively. They are representative of the cooling channels sizes under consideration for the cooling of Pixel detectors for future particle colliders. The data have been collected for saturation temperatures between -45 and -15°C, with mass fluxes in the range of 370 to 1000 kg/m3, and heat fluxes between 5 and 41 kW/m3. Data show good agreement with the Flow Pattern Maps model of Thome and Cheng over a large vapor quality range, but show a higher value of dry-out compared to that predicted by their model.

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Pages : 8 p.

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Détails

  • Titre original : Heat transfer convection measurements of boiling CO2 in small horizontal tubes at low temperature.
  • Identifiant de la fiche : 30002093
  • Langues : Anglais
  • Source : Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Date d'édition : 21/08/2011

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