Axial heat exchanger

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

Patent

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F28D 7/16 (2006.01)

Patent

CA 2603989

The present invention offers an improved axial heat exchanger for exchanging heat between a gas medium and a fluid or liquid medium. The axial heat exchanger comprises a longitudinal and substantially axially extended outer channel that is adapted to enclose a flow of a first gas medium. The heat exchanger also comprises a plurality of substantially parallel inner channels that are adapted to enclose a flow of a second liquid medium. The inner channels are arranged inside the outer channel so as to extend substantially axially along the inside of said outer channel for enabling a transfer of heat between said first gas medium and said second liquid medium. The heat transfer is improved to some extent as the number of inner channels increases and it is further improved in that at least one of the inner channels is joined with at least one elongated sheet. The sheet is arranged to extend substantially axially along the inner channel so as to substantially coincide . with the direction of flow of the first gas medium through the outer channel.

L'invention concerne un échangeur thermique axial amélioré, destiné à l'échange de chaleur entre un support gazeux et un support fluide ou liquide. L'échangeur thermique axial comprend un canal extérieur longitudinal s'étendant sensiblement axialement, adapté pour la circulation d'un premier support gazeux. L'échangeur thermique comprend également une pluralité de canaux intérieurs sensiblement parallèles entre eux et qui sont adaptés pour la circulation d'un second support liquide. Les canaux intérieurs sont agencés à l'intérieur du canal extérieur, de manière à s'étendre sensiblement axialement le long de l'intérieur dudit canal extérieur, en vue de permettre un transfert de chaleur entre ledit premier support gazeux et ledit second support liquide. Le transfert thermique est amélioré du fait que le nombre de canaux intérieurs est augmenté et, également, du fait qu'au moins l'un des canaux intérieurs est relié avec au moins une tôle allongée. La tôle est agencée de manière à s'étendre sensiblement axialement le long du canal intérieur, afin de coïncider sensiblement avec la direction d'écoulement du premier support gazeux à travers le canal extérieur.

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