Heat recovery device for exhaust flues

Details Heat recovery device for exhaust flues Heat recovery device for exhaust flues

1983-03-31

1985-11-05

Koczo, Michael

Heat exchange

Structural installation

165901, F28D 702

Patent

active

045507724

ABSTRACT:
The heat recovery device has a flue pipe assembly including a section of standard flue pipe carrying a plurality of hollow, cylindrical heating tubes extending diametrically through the flue pipe section in axially spaced, parallel relationship and a separate housing defining an air flow chamber surrounding a portion of the flue pipe section. A fan inside the housing draws ambient air into the housing through an ambient air inlet located on the same side of the flue pipe assembly as the inlet of the heating tubes and propels a flow of air both through the heating tubes and over the outer surface of the flue pipe section towards a heated air outlet located on the same side of the flue pipe section as the discharge ends of the heating tubes. The flue pipe assembly is removably mounted on the housing so it can be removed in the event it fatigues and/or becomes plugged with carbon or creosote deposits during use. A thermostat on the flue pipe section turns the fan on and off when the temperature in the flue pipe section is respectively above and below a predetermined temperature. The total open area of the ambient air inlet and the heated air outlet is large enough so that, in the event the fan is inoperative, the natural flow of ambient air through the heating tubes and over the outer surface of the flue pipe is sufficient to prevent the flue pipe section from overheating.

REFERENCES:
patent: 4028817 (1977-06-01), Winstel
patent: 4125153 (1978-11-01), Stoneberg
patent: 4147303 (1979-04-01), Talucc
patent: 4176709 (1979-12-01), Johnson
patent: 4235286 (1980-11-01), Behlau
patent: 4303122 (1981-12-01), Powell
patent: 4313562 (1982-02-01), White
patent: 4326344 (1982-04-01), Smith

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