(JP10502213-W)      Method of increasing the flame temp. of combustion gases, used with a furnace of the type having a shell, an air inlet for introducing a furnace fuel into the shell, and a fuel preheat chamber disposed outside of the shell and integral with the shell, comprises: (a) introducing a low temp. furnace fuel into the fuel preheat chamber; (b) flowing the fuel through the preheat chamber such that the fuel is in heat transfer relationship with combustion gases thereby heating the low temp. furnace fuel to produce a high temp. furnace fuel; (c) flowing the high temp. furnace fuel to the fuel inlet; and (d) combusting the high temp. furnace fuel and air, thereby creating the combustion gases, the gases having a flame temp. of 2100 - 2700 F. Also claimed are: (i) a furnace to provide combustion gases by combusting a furnace fuel and air, the furnace having a shell, an air inlet for introducing the air into the shell, a fuel inlet for introducing the furnace fuel into the shell; and (ii) an improved fuel cell power plant of the type having a fuel processing appts. to provide a product gas by steam reforming a hydrocarbon fuel and steam.    USE -   Used for processing fuel using an improved furnace for a fuel cell power plant.    ADVANTAGE -   The improved furnace design increases the temp. of the fuel and/or air prior to their introduction into the furnace, giving lowered costs with efficient prodn.    (US5931658-A)      Method of increasing the flame temp. of combustion gases, used with a furnace of the type having a shell, an air inlet for introducing a furnace fuel into the shell, and a fuel preheat chamber disposed outside of the shell and integral with the shell, comprises: (a) introducing a low temp. furnace fuel into the fuel preheat chamber; (b) flowing the fuel through the preheat chamber such that the fuel is in heat transfer relationship with combustion gases thereby heating the low temp. furnace fuel to produce a high temp. furnace fuel; (c) flowing the high temp. furnace fuel to the fuel inlet; and (d) combusting the high temp. furnace fuel and air, thereby creating the combustion gases, the gases having a flame temp. of 2100 - 2700 F. Also claimed are: (i) a furnace to provide combustion gases by combusting a furnace fuel and air, the furnace having a shell, an air inlet for introducing the air into the shell, a fuel inlet for introducing the furnace fuel into the shell; and (ii) an improved fuel cell power plant of the type having a fuel processing appts. to provide a product gas by steam reforming a hydrocarbon fuel and steam.    USE -   Used for processing fuel using an improved furnace for a fuel cell power plant.    ADVANTAGE -   The improved furnace design increases the temp. of the fuel and/or air prior to their introduction into the furnace, giving lowered costs with efficient prodn.    (EP770269-B1)      Method of increasing the flame temp. of combustion gases, used with a furnace of the type having a shell, an air inlet for introducing a furnace fuel into the shell, and a fuel preheat chamber disposed outside of the shell and integral with the shell, comprises: (a) introducing a low temp. furnace fuel into the fuel preheat chamber; (b) flowing the fuel through the preheat chamber such that the fuel is in heat transfer relationship with combustion gases thereby heating the low temp. furnace fuel to produce a high temp. furnace fuel; (c) flowing the high temp. furnace fuel to the fuel inlet; and (d) combusting the high temp. furnace fuel and air, thereby creating the combustion gases, the gases having a flame temp. of 2100 - 2700 F. Also claimed are: (i) a furnace to provide combustion gases by combusting a furnace fuel and air, the furnace having a shell, an air inlet for introducing the air into the shell, a fuel inlet for introducing the furnace fuel into the shell; and (ii) an improved fuel cell power plant of the type having a fuel processing appts. to provide a product gas by steam reforming a hydrocarbon fuel and steam.    USE -   Used for processing fuel using an improved furnace for a fuel cell power plant.    ADVANTAGE -   The improved furnace design increases the temp. of the fuel and/or air prior to their introduction into the furnace, giving lowered costs with efficient prodn.