HIGH-EFFICIENCY DUAL-STACK MOLTEN CARBONATE FUEL CELL SYSTEM
First Claim
1. A dual stack fuel cell system comprising:
- a first fuel cell stack comprising a first anode side, adapted to receive fuel and to output a first anode exhaust, and a first cathode side;
a second fuel cell stack comprising a second anode side, adapted to receive processed anode exhaust derived from said first anode exhaust and to output a second anode exhaust, and a second cathode side, adapted to receive oxidant gas and to output a first cathode exhaust;
wherein said first cathode side receives at least said first cathode exhaust outputted from said second cathode side; and
wherein said first fuel cell stack includes indirect internal reforming and said second fuel cell stack does not include any indirect internal reforming.
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Accused Products
Abstract
A dual stack fuel cell system comprising a first fuel cell stack comprising a first anode side, adapted to receive fuel and to output a first anode exhaust, and a first cathode side, a second fuel cell stack comprising a second anode side, adapted to receive processed anode exhaust derived from the first anode exhaust and to output a second anode exhaust, and a second cathode side, adapted to receive oxidant gas and to output a first cathode exhaust, wherein the first cathode side receives at least the first cathode exhaust outputted from the second cathode side; and wherein the first fuel cell stack includes indirect internal reforming and the second fuel cell stack may not include any indirect internal reforming.
63 Citations
26 Claims
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1. A dual stack fuel cell system comprising:
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a first fuel cell stack comprising a first anode side, adapted to receive fuel and to output a first anode exhaust, and a first cathode side; a second fuel cell stack comprising a second anode side, adapted to receive processed anode exhaust derived from said first anode exhaust and to output a second anode exhaust, and a second cathode side, adapted to receive oxidant gas and to output a first cathode exhaust; wherein said first cathode side receives at least said first cathode exhaust outputted from said second cathode side; and wherein said first fuel cell stack includes indirect internal reforming and said second fuel cell stack does not include any indirect internal reforming. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A dual stack fuel cell system comprising:
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a first fuel cell stack comprising a first anode side, adapted to receive fuel and to output a first anode exhaust, and a first cathode side; a second fuel cell stack comprising a second anode side, adapted to receive processed anode exhaust derived from said first anode exhaust and to output a second anode exhaust, and a second cathode side, adapted to receive oxidant gas and to output a first cathode exhaust; wherein said first cathode side receives at least said cathode exhaust outputted from said second cathode side; and wherein said first fuel cell stack includes a first indirect internal reformer and said second fuel cell stack includes a second indirect internal reformer, said fuel cell system further comprising a reformer bypass line for bypassing a portion or all of said processed anode exhaust around said second indirect internal reformer to an anode compartment of said second anode side. - View Dependent Claims (19, 20, 21)
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22. A dual stack fuel cell system comprising:
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a first fuel cell stack comprising a first anode side, adapted to receive fuel and to output a first anode exhaust, and a first cathode side; a second fuel cell stack comprising a second anode side, adapted to receive processed anode exhaust derived from said first anode exhaust and to output a second anode exhaust, and a second cathode side, adapted to receive a first portion of oxidant gas derived from said second anode exhaust and to output a first cathode exhaust; wherein said first cathode side receives said first cathode exhaust, a second portion of said oxidant gas and additional air from an outside source, and wherein the temperature in said first fuel cell stack is controlled by controlling the amount of additional air received in said first cathode side and the temperature in said second fuel cell stack is controlled by controlling at least one of the amount of said first portion of oxidant gas received in said second cathode side and the amount of second portion of said oxidant gas received in said first cathode side.
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23. A dual stack fuel cell system comprising:
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a first fuel cell stack comprising a first anode side, adapted to receive fuel and to output a first anode exhaust, and a first cathode side; a second fuel cell stack comprising a second anode side, adapted to receive processed anode exhaust derived from said first anode exhaust and to output a second anode exhaust, and a second cathode side, adapted to receive a first portion of oxidant gas derived from said second anode exhaust and to output a first cathode exhaust, wherein said first cathode side receives said first cathode exhaust, a second portion of said oxidant gas and additional air from an outside source, and a reactor assembly including a methanation reactor for converting carbon monoxide in said first anode exhaust to methane, wherein at least a portion of said first anode exhaust is conveyed through said methanation reactor and wherein the temperature in said second fuel cell stack is controlled by controlling the amount of said first anode exhaust conveyed through said methanation reactor. - View Dependent Claims (24, 25, 26)
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Specification