FUEL CELL SYSTEM AND METHOD FOR OPERATING THE SAME

The invention relates to a fuel cell system (100), comprising: at least one fuel cell stack (1), which has an anode portion (2) and a cathode portion (3); an anode supply segment (5) for supplying reformed anode supply gas from a reformer (4) to the anode portion (2); the reformer (4) for reforming reformer supply gas; a reformer supply segment (14) for supplying the reformer supply gas to the reformer (4); an anode return segment (6) for returning anode exhaust gas for reuse in the anode portion (2); a heat exchanger (8), which has a first fluid-conducting segment (9) for conducting the anodeexhaust gas and a second fluid-conducting segment (10) for conducting the reformer supply gas, the first fluid-conducting segment (9) and the second fluid-conducting segment (10) having a heat-transferring connection to one another within the heat exchanger (8) at least in parts for heat transfer between the anode exhaust gas and the reformer supply gas; a fan segment (24) downstream of the firstfluid-conducting segment