Stoves and furnaces – Stoves – Heating
Patent
1987-05-27
1988-08-23
Joyce, Harold
Stoves and furnaces
Stoves
Heating
126316, F23L 1702
Patent
active
047653086
ABSTRACT:
A venting system using natural convection cooling is disclosed in which a sleeve is inserted within a flue pipe. The annulus between that sleeve and the flue pipe is sealed at an inside end and the flue pipe is provided with a plurality of vent holes in the periphery of its outer end, which is positioned outside a building. That annulus forms a cooling passage and outside air is drawn through the annulus by a natural convection process to dramatically lower the flue pipe temperature. The outer end of that sleeve is open to a vent hood. An outer wall sleeve is also positioned around the flue pipe and sealed at one end in order to form an annulus containing an insulating air layer. That reduces the heat conduction to the outer wall sleeve, substantially reducing the outer wall sleeve temperature. The venting system also includes a vent hood having a double hood in which the outermost hood is spaced from the inner one. By arranging the outer hood to be open at the top and bottom, a natural convection process provides cooling air which rises through the space between the inner and outer walls, preventing convective and radiant heat from the inner hot hood from being transmitted to the outer hood, and reducing the temperature of the outer hood to a level which permits touching without injury.
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Energy Kinetics
Joyce Harold
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