Air preheater heat transfer elements and method of manufacture

Details Air preheater heat transfer elements and method of manufacture Air preheater heat transfer elements and method of manufacture

F - Mech Eng,Light,Heat,Weapons

28

D

F28D 19/04 (2006.01) B21D 13/04 (2006.01)

Patent

CA 2292590

Heat transfer elements (34) for rotary regenerative heat exchangers are formed with spacing ridges or notches (42) having flow-disrupted indentations (46) in the peaks of the notches (42) formed at selected intervals to project into the flow channels (36, 38). These projections (46) interrupt the boundary layer and cause turbulence and mixing to enhance the heat transfer. Various methods of forming the indentations (46) are disclosed.

Ces éléments de transfert de chaleur (34) destinés à des échangeurs de chaleur rotatifs à récupération comportent dans leur structure des crêtes ou des creux (42) présentant des dentelures de rupture de flux (46) au niveau des crêtes des creux (42) constitués à des intervalles spécifiques de façon à déborder dans les canaux d'écoulement (36, 48). Ces débordements (46) interrompent la couche limite et provoquent des turbulences et des mélanges venant améliorer le transfert de chaleur. L'invention concerne également divers procédés de formation des dentelures (46).

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