Introduction of image analysis for the quantification of the boiling flow heat transfer
Identifieur interne : 001612 ( Main/Exploration ); précédent : 001611; suivant : 001613Introduction of image analysis for the quantification of the boiling flow heat transfer
Auteurs : C. Ferret [France] ; Laurent Falk [France] ; U. D'Ortona [France] ; A. Chenu [France] ; T. T. Veenstra [Pays-Bas]Source :
- Chemical engineering journal : (1996) [ 1385-8947 ] ; 2004.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Heat transfer performances for non-boiling and boiling flow of a micro-vaporizer have been measured by standard methods (temperatures, flow rates, effective power input). The study was carried out for laminar flow (Re < 25) in silicon micro-channels (5 mm x 3 cm x 200 μm) filled with ordered obstacles to increase the specific area. The results obtained show a strong dependence of the heat transfer on the Reynolds number for the non-boiling flow and pretty high heat transfer coefficients (1300-2500 W/m2 K) for the boiling flow. Image analysis was introduced to estimate the volume vapour fraction, which can be converted into the mass vapour fraction using the slip ratio. The estimation of this slip ratio is discussed in this paper.
Affiliations:
- France, Pays-Bas
- Grand Est, Lorraine (région), Overijssel, Provence-Alpes-Côte d'Azur
- Enschede, Marseille, Nancy
- Centre national de la recherche scientifique, Laboratoire réactions et génie des procédés, Université de Lorraine, Université de Twente
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Le document en format XML
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<front><div type="abstract" xml:lang="en">Heat transfer performances for non-boiling and boiling flow of a micro-vaporizer have been measured by standard methods (temperatures, flow rates, effective power input). The study was carried out for laminar flow (Re < 25) in silicon micro-channels (5 mm x 3 cm x 200 μm) filled with ordered obstacles to increase the specific area. The results obtained show a strong dependence of the heat transfer on the Reynolds number for the non-boiling flow and pretty high heat transfer coefficients (1300-2500 W/m<sup>2</sup>
K) for the boiling flow. Image analysis was introduced to estimate the volume vapour fraction, which can be converted into the mass vapour fraction using the slip ratio. The estimation of this slip ratio is discussed in this paper.</div>
</front>
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