Heat exchanger with dimpled bypass channel

Details Heat exchanger with dimpled bypass channel Heat exchanger with dimpled bypass channel

F - Mech Eng,Light,Heat,Weapons

28

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F28F 13/06 (2006.01) F01M 5/00 (2006.01) F28D 1/03 (2006.01) F28D 1/053 (2006.01) F28F 1/08 (2006.01) F28F 3/04 (2006.01)

Patent

CA 2272804

A heat exchanger is disclosed having a plurality of stacked plate pairs or tubes, each having a predetermined internal cold flow resistance. A bypass conduit is included in the stack of plate pairs or tubes. The bypass conduit includes a central row of spaced-apart, mating dimples defining longitudinal flow channels on either side of the dimples for bypass flow through the bypass conduit under cold flow conditions. The longitudinal flow channels have a height and width such that the cold flow resistance therethrough is less than the cold flow resistance through the stacked plate pairs or tubes. In normal or hot flow conditions, the dimples create flow resistance by forcing the fluid flowing through the bypass conduit to change velocity and direction. This forces more oil to flow through the stacked plate pairs or tubes increasing heat transfer performance.

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