F - Mech Eng,Light,Heat,Weapons – 24 – H
Patent
F - Mech Eng,Light,Heat,Weapons
24
H
158/18, 257/20
F24H 1/00 (2006.01) F24C 3/00 (2006.01)
Patent
CA 1227190
ABSTRACT A heat exchanger for heating air supplied to a burner is described. The heat exchanger includes two passages. One of the passages provides a channel through which combustion gas is exhausted from the burner while the other passage pro- vides a channel through which air is supplied to the burner. The two passages are arranged to transfer heat from the com- bustion gas to the combustion air. Each of the passages in- cludes a helical guide baffle for directing fluid through each respective passage substantially along a helical flow path. The helical guide baffles of the passages each exhibits a var- iable pitch which changes at a predetermined rate to maintain the pressure and velocity of the fluid in the respective pass- ages within predetermined limits.
457727
Braune Rudolf E.
Fischer Ekkehard
Loukas Paul W.
Advanced Combustion Inc.
Ridout & Maybee Llp
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