Abstract: A fuel cell system having a reforming reactor is disclosed, in which condensed water generated in the reforming reactor is drained during the warming-up of the system, so as to quickly complete the warming-up. The system comprises a fuel cell for generating power by using a supplied fuel gas and oxidizing gas; a reforming reactor for reforming original fuel gas so as to produce a reformed fuel gas which is supplied to the fuel cell; and a drain for condensed water stored in the reforming reactor. A water-collecting portion is formed by a plurality of sloped portions and is attached to the bottom of the reforming reactor, and the drain is connected to the water-collecting portion.

Abstract: Air for reforming used in the reformation reaction in a reformer 3 of a fuel cell system FCS is supplied into an evaporator 2. In the evaporator 2, raw fuel liquid is evaporated to produce raw fuel gas. The reforming air and the raw fuel gas are well admixed within the evaporator 2 and a conduit 8C connecting the evaporator 2 to the reformer 3. At the starting of the fuel cell system FCS, a large amount of the air is introduced into the evaporator 2 via an air inlet port 14B for starting. The fuel cell system having such a configuration can appropriately mix the fuel gas in the reformer with the reforming air and can rapidly operate the evaporator and the reformer at the time of starting without enlarging the total size of the fuel cell system.

Abstract: A fuel cell system comprises a fuel cell in which first reactant gas and second reactant gas are supplied to generate electricity, an evaporator for evaporating a raw fuel, which combusts exhaust gas discharged from said fuel cell and makes use of said exhaust gas to evaporate and volatize a raw material for said first reactant gas, a reformer which reforms the evaporated and volatilized raw fuel vapor by means of a reforming catalyst to produce the first reactant gas, and an air-introducing device, which introduces air used to be reformed into the evaporator or the reformed in a manner that the flow rate of the air is controlled depending upon the output from the fuel cell and upon the temperature of the raw fuel vapor.