Heat exchanger fin with efficient material utilization

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

Patent

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F28F 1/32 (2006.01) F28D 1/04 (2006.01)

Patent

CA 2235674

A heat exchanger (10) including a heat exchanger conduit and fins arranged on the conduit tubes (12, 12') to further heat transfer between the external fluid flowing over the fins (22, 22') and the fluid flowing within the conduit. The fins (22, 22') include a row of apertures through which tubes (12, 12') of the heat exchanger conduit extend. The leading (4, 6) and trailing (48) edges of the fins (22, 22') are contoured to substantially conform to isotherms around the circulating fluid flowing within the tubes (12, 12'). To achieve this edge configuration while also allowing for a dense packing of fins and tubes in a multi-row heat exchanger, the leading and trailing edges are wave-shaped such that adjacent fins can interfit together.

Cette invention concerne un échangeur thermique (10) comprenant un conduit d'échangeur thermique ainsi que des pales disposées sur les tubes (12, 12') du conduit de manière à accroître le transfert de chaleur entre le fluide externe s'écoulant sur les ailettes (22, 22') et le fluide s'écoulant à l'intérieur du conduit. Les ailettes (22, 22') comportent une rangée d'ouvertures à travers lesquelles passent les tubes (12, 12') du conduit de l'échangeur thermique. Les bords d'attaque (4, 6) et de fuite (48) des ailettes (22, 22') possèdent un contour correspondant sensiblement à la forme des éléments isothermes autour du fluide circulant à l'intérieur des tubes (12, 12'). Afin d'obtenir une elle configuration ainsi qu'une disposition dense des ailettes et des tubes dans un échangeur thermique à rangées multiples, les bords d'attaque et de fuite possèdent une forme ondulée de sorte que des ailettes adjacentes puissent s'intercaler les unes entre les autres.

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