Heat exchanger barrier ribbon with polymeric tubes

F - Mech Eng,Light,Heat,Weapons – 28 – F

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F28F 21/06 (2006.01) F28F 1/22 (2006.01)

Patent

CA 2458737

Heat exchanger structures for conducting fluid are provided in the form of multiple spaced-apart polymeric tubes (12) embedded in foil laminate (14) which includes metal and at least one polymer. Useful polymers are polyolefins, polyesters and polyamides. The metal provides barrier protection making the structure suitable for refrigeration uses as well as providing an extended heat transfer surface between the tubes for when the elements are used for heat transfer, and the polymer on the foil permits it to be sealed closely around the tubes to improve heat transfer. The tubes are of a geometry which provides burst strength, so that the metal can be quite thin.

L'invention concerne des structures d'échange de chaleur, destinées à la conduction de fluide, disposées sous la forme de multiples tubes espacés de polymère (12) imbriqués dans un stratifié en feuille (14) comprenant un métal et au moins un polymère. Les polymères utiles concernés sont des polyoléfines, des polyesters et des polyamides. Le métal joue le rôle de protection barrière rendant la structure adaptée à des utilisations en réfrigération tout en fournissant une surface étendue de transfert de chaleur entre les tubes, lorsque les éléments sont utilisés en transfert de chaleur, et le polymère, disposé sur la feuille, permet de sceller la feuille, serrée autour des tubes, afin d'améliorer le transfert de chaleur. Les tubes possèdent, en raison de leur géométrie, une résistance à l'éclatement, de façon que le métal peut être relativement fin.

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