COMPOSITE FUEL CELL SYSTEM

摘要

Disclosed is a composite fuel cell system comprising a first fuel cell arrangement (110) containing a plurality of high-temperature fuel cells (112), especially carbonate melt fuel cells, and comprising a second fuel cell arrangement (210) containing a plurality of low-temperature fuel cells (212), especially polymer electrolyte membrane fuel cells, also comprising an anode gas transport line connection (120) mounted between the anode outlet (114) of the first fuel cell arrangement (110) and the anode inlet (213) of the second fuel cell arrangement (210) used to transport the anode off gas associated with the first fuel cell arrangement (110) as anode feed gas associated with the second fuel cell arrangement (210). According to a first embodiment of the invention, a gas return line connection (140) is mounted between the anode outlet (210) of the second fuel cell arrangement (210) and the cathode inlet (115) of the first fuel cell arrangement (110) and used for returning the cathode off gas of the second fuel cell arrangement (210) to the cathode input (115) of the first fuel cell arrangement (110). In a second embodiment of the invention, the gas cleaning device (135) is formed by a gas separating device. A gas return line connection (145) is provided between the gas cleaning device (135) mounted in the anode gas transport line connection (120) for separating undesirable gas components from the anode off gas and the cathode inlet (115) of the first fuel cell arrangement (110) in order to return at least one part of the gas components separated in the gas cleaning device (135) to the cathode inlet (115) of the first fuel cell arrangement (110).