Heat exchanger

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

Patent

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Details

F28F 9/00 (2006.01) F28D 7/16 (2006.01) F28F 1/02 (2006.01) H01M 8/04 (2006.01)

Patent

CA 2493468

In order to provide a heat exchanger with casing having a multiplicity of tubes through the interiors of which a high-temperature gas for heating flows, wherein the thermal stress is smoothly accommodated and wherein a fluid to be heated or a heating fluid flows uniformly through the outsides of the tubes, a multiplicity of flat tubes are joined at their opposed ends to a pair of discoidal tube plates, the outer periphery of the flat tubes being enclosed by an inner cylinder having a rectangular cross-section except the opposed end portions of the flat tubes, with a pair of baffle plates being disposed at the opposed ends of the inner cylinder. The pair of baffle plates are covered with an circular outer cylinder having a corrugated portion that is thermally expandable, with an inlet and an outlet for the fluid to be heated or the heating fluid positioned between the pair of baffle plates and the tube plates.

La présente invention a trait à un échangeur thermique comportant une enveloppe, comprenant une pluralité de tubes dans lesquels circule un gaz de chauffage à température élevée, dans lequel la contrainte thermique est aisément absorbée, et le fluide à réchauffer ou le fluide réchauffé circule de manière uniforme sur la face avant extérieure de chacun des tubes. Les deux extrémités de la pluralité de tubes plats sont assemblées à une paire de plaques de tubes circulaires en forme de disques, la périphérie externe des tubes plats est recouverte par un tube interne de section carrée avec les deux portions terminales du groupe de tubes plats restant découverts, et une paire de plaques de chicane est prévue aux deux extrémités du tube interne. La paire de plaques de chicane est recouverte par un tube externe creux de forme cylindrique présentant une portion thermiquement expansible recourbée en forme ondulée. Les orifices d'entrée et de sortie de fluide à réchauffer ou de fluide réchauffé sont aménagés entre la paire de plaques de chicane et les plaques de tubes individuelles.

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