Abstract: A bonded object production method according to an embodiment uses a continuous furnace to process a stacked body including a metal member, a ceramic member, and a brazing material layer located therebetween, while conveying the stacked body; and the method includes a process of heating the stacked body in an inert atmosphere from 200° C. to a bonding temperature at an average temperature raising rate of the stacked body of not less than 15° C./min, a process of bonding the stacked body in an inert atmosphere at the bonding temperature that is within a range of not less than 600° C. and not more than 950° C., and a process of cooling the stacked body from the bonding temperature to 200° C. at an average temperature lowering rate of the stacked body of not less than 15° C./min. A ceramic substrate is favorably a silicon nitride substrate.

Abstract: The method controls a differential pressure of a plate reformer installed in a fuel cell power generation system. In the power generation system, a raw material gas is reformed to a fuel gas in the plate reformer, the fuel gas is fed to an anode of a fuel cell, an anode exhaust gas from the anode is fed to a combustion chamber of the plate reformer a combustion exhaust gas from the combustion chamber is fed to a cathode of the fuel cell together with an air, and part of the air is fed to the combustion chamber.

Abstract: The power generation system includes a reformer and two fuel cell stacks. The reformer and the fuel cell stacks are provided in series. Fuel gas produced by the reformer is introduced to a first anode of the first fuel cell stack. Gases discharged from the first anode are directly introduced to a second anode of the second fuel cell stack. Air is introduced to a first cathode of the first fuel cell stack. Gases discharged from the first cathode are cooled by a cooling device and then introduced to a second cathode of the second fuel cell stack. Gases discharged from the second anode and gases discharged from the second cathode are introduced to a heating chamber of the reformer. Gases discharged from the heating chamber are introduced to a steam generator to produce steam used for reformation and then recirculated to the first cathode.