Catalytic gas-fired furnace system and method

Details Catalytic gas-fired furnace system and method Catalytic gas-fired furnace system and method

F - Mech Eng,Light,Heat,Weapons

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F23D 14/18 (2006.01) F23C 3/00 (2006.01) F23J 11/00 (2006.01) F24H 3/10 (2006.01) F24H 8/00 (2006.01) F24H 1/00 (2006.01)

Patent

CA 1166950

ABSTRACT OF THE DISCLOSURE A gas-fired, forced air furnace system employing a fiber matrix burner element and a condensing-type heat exchanger to achieve both high system thermal efficiency and low emission of NOX and other gaseous pollutants. The value of excess air in the fuel-air reactants supplied to the ceramic fiber matrix burner is selected to be equal to or greater than ten percent to provide NOX emissions below fifteen ppm on an air-free basis, with CO and HC emissions substantially comparable to those from existing furnaces, and the surface area of the condensing portion of the heat exchanger system is designed to produce sufficient conden- sation of moisture in the combustion gasses to produce an overall system thermal efficiency of at least about ninety percent.

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