FUEL CELL SYSTEM COMPRISING AT LEAST ONE FUEL CELL

摘要

The invention relates to a fuel cell system (1) comprising at least one fuel cell (2). An air delivery device (6) delivers feed air to a cathode chamber (3) of the fuel cell (2). The fuel cell system (1) is provided with a turbine (21) for expanding a waste air stream (17.4) from the region of the cathode chamber (3), and a burner (19) for heating the waste air stream (17.3, 17.4) before the turbine (21). A heat exchanger (18) is provided, through which both the waste air (22.1, 22.2) from the turbine (21) and the waste stream (17.1, 17.2, 17.3) flow before the burner (19) in the flow direction.