Fuel cell system

A fuel cell system (10) comprising a fuel supply unit, at least one high temperature fuel cell (12) with a cathode (14) and an anode (16), and an electrolyte (18) which is arranged between the cathode (14) and the anode (16), the cathode (14) having a cathode feed line (15), and the anode (16) having an anode feed line (16a), and the anode (16) being flow-connected via the anode feed line (16a) to the fuel supply unit, and a reforming apparatus (62) being arranged in the anode feed line (16a), an anode off-gas line (16b) for the discharge at least of anode off-gas from the anode (16), furthermore, being arranged, the fuel cell system (10) having an exhaust gas heat exchanger (20) for cooling exhaust gas and a recirculation conveying device (30) for returning anode off-gas to the reforming apparatus (62), the recirculation conveying device (30) and the exhaust gas heat exchanger (20) being connected to one another in a fluid-communicating manner via a common cooling circuit (40) for respective cooling, which common cooling circuit (40) has a central cooling fluid store (42) as fluid source with a heat exchanger (44), and in which common cooling circuit (40) cooling fluid can be circulated in a cooling line, the cooling circuit (40) having at least one pump (46) for conveying cooling fluid.