F - Mech Eng,Light,Heat,Weapons – 28 – F
Patent
F - Mech Eng,Light,Heat,Weapons
28
F
F28F 1/08 (2006.01) F28D 7/10 (2006.01) F28F 1/06 (2006.01)
Patent
CA 2455196
The invention provides a novel means for producing helicoid flights from thin section flat aluminum sheet. Using a plurality of said flights forms a heat exchange element. The aluminum sheet is first bent longitudinally 90% to form an "L". A helicoid is formed by forging tapered ribs into the long section of the "L" shape, having no height to the rib at the bent corner and maximum rib height at the edge. Flattening the ribs at a point from the edge equal to the length of the short section of the "L", and bending the aluminum from that point at 90% will form a "U" shape. A plurality of said helicoid flights are then wound around a central insulated axis in an over lapping manner and clamped inside an insulated tube to form the heat exchange element. The counter flowing fluids passing through the pathways formed by the helicoids are collected by manifolds, at their respective ends of the heat exchanger element, and directed away as required.
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