Heat exchanger fin with efficient material utilization

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

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F28F 1/32 (2006.01)

Patent

CA 2238282

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 (46) and trailing edges (48) 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.

L'invention porte sur un échangeur thermique (10) comportant un conduit échangeur thermique ainsi que des ailettes disposées dans les tubes (12, 12') du conduit pour augmenter le transfert de chaleur entre le fluide externe s'écoulant sur les ailettes (22, 22') et le fluide s'écoulant sur les ailettes. Ces ailettes (22, 22') comportent une rangée d'ouvertures à travers lesquelles s'étendent des tubes (12, 12') du conduit échangeur thermique. Les bords d'attaque (46) et de fuite (48) des ailettes (22, 22') sont profilés de façon à respecter sensiblement des isothermes autour de l'écoulement de fluide dans les tubes (12, 12'). Afin de réaliser cette configuration des bords tout en permettant un agencement dense des ailettes et des tubes dans un échangeur thermique à rangées multiples, les bords d'attaque et de fuite sont en forme de vague afin que des ailettes contiguës soient en mesure de s'imbriquer.

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