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

1997-06-13

1999-11-09

Hughes, S. Thomas

Metal working

Method of mechanical manufacture

Heat exchanger or boiler making

165 10, 165 8, 29890039, 72197, B23P 1526

Patent

active

059790504

ABSTRACT:
Heat transfer elements for rotary regenerative heat exchangers are formed with spacing ridges or notches having flow-disrupting indentations in the peaks of the notches formed at selected intervals to project into the flow channels. These projections interrupt the boundary layer and cause turbulence and mixing to enhance the heat transfer. Various methods of forming the indentations are disclosed.

REFERENCES:
patent: 2329789 (1943-09-01), Schank et al.
patent: 2940736 (1960-06-01), Odman
patent: 4553458 (1985-11-01), Schoonover
patent: 4744410 (1988-05-01), Groves
patent: 5491997 (1996-02-01), Ogawa
International Search Report for International Patent No. PCT/US 98/07023 completed Jul. 24, 1998.

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