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Étude expérimentale d'un échangeur de chaleur à tubes à ailettes en spirale
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ISBN10: 6209247628
ISBN13: 9786209247620
Publisher: Editions Notre Savoir
Published: Nov 10 2025
Pages: 56
Weight: 0.19
Height: 0.13 Width: 6.00 Depth: 9.00
Language: French
ISBN13: 9786209247620
Publisher: Editions Notre Savoir
Published: Nov 10 2025
Pages: 56
Weight: 0.19
Height: 0.13 Width: 6.00 Depth: 9.00
Language: French
Dans ce livre, l'échangeur de chaleur a été testé avec différentes épaisseurs d'ailettes et de tubes d'aluminium. La géométrie de l'ailette, la conductivité thermique du matériau, les conditions limites à l'extrémité de l'ailette et le coefficient de transfert de chaleur (h) à la surface de l'ailette sont autant d'éléments qui influencent l'efficacité d'une ailette à base de matériaux composites. Le transfert de chaleur par convection forcée a été calculé à l'aide d'une éprouvette en aluminium avec des épaisseurs d'ailettes à base de matériaux composites de 0,5, 0,6 et 0,7 mm et des pas d'ailettes de 4,23 et 6,35 mm. Les résultats montrent qu'un espacement de 4,23 mm optimise le transfert de chaleur, ce qui indique qu'un plus grand nombre d'ailettes est plus efficace. Le facteur de Colburn (j) a été calculé pour la convection forcée sur un échantillon d'aluminium avec des épaisseurs d'ailettes hélicoïdales de 0,5, 0,6 et 0,7 mm et des pas d'ailettes à base de composite de 4,23 et 6,35 mm. Les résultats des essais montrent que le facteur de Colburn (j) est rarement affecté par le pas des ailettes à base de matériaux composites. Une éprouvette en aluminium avec des épaisseurs hélicoïdales d'ailettes composites de 0,5 mm, 0,6 mm et 0,7 mm avec des pas d'ailettes composites de 4,23 mm et 6,35 mm a été utilisée pour calculer le coefficient de frottement pour la convection forcée. Cette méthode a permis d'améliorer l'efficacité du transfert de chaleur.
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