Fuel cell system

Fuel cell system (10) comprising at least one fuel cell stack (11) having an anode section (12) and a cathode section (13), an ejector (14), a fuel mixture line (15) for conveying a fuel mixture containing primary fuel and secondary fuel from the ejector (14) to the anode section (12), a primary fuel line (16) for supplying the primary fuel to the ejector (14), and a recirculation line (17) for returning the secondary fuel from the anode section (16) to the ejector (14),

• characterised in that
• at least sections of the primary fuel line (16) extend through a heat exchange volume (18) within the recirculation line (17) for a heat-transmitting connection between the secondary fuel and the primary fuel upstream of a suction nozzle section (27) via a wall of the primary fuel line (16) prior to intermixing.