Fuel cell system and method for operating the fuel cell system
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0860509
(2001-05-21)
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우선권정보 |
DE-0024570 (2000-05-19) |
발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
6 인용 특허 :
2 |
초록
▼
A fuel cell system and method of operation in which the fuel cell system has a fuel cell unit with anode and cathode, a media flow path for supplying substantially pure hydrogen to the anode, a media flow path for the cathode, an anode exhaust-gas flow path and a cathode exhaust-gas flow path. A fan
A fuel cell system and method of operation in which the fuel cell system has a fuel cell unit with anode and cathode, a media flow path for supplying substantially pure hydrogen to the anode, a media flow path for the cathode, an anode exhaust-gas flow path and a cathode exhaust-gas flow path. A fan for supplying air to the cathode is provided in the flow path of the cathode, and a catalytic burner is arranged in the cathode exhaust-gas flow path. The anode exhaust-gas flow path opens into the catalytic burner and/or into the cathode exhaust-gas flow path upstream of the catalytic burner. The combined, catalytically converted fuel cell exhaust-gas flow is passed into an expansion machine.
대표청구항
▼
1. A method for operating a fuel cell system having a fuel cell unit with an anode and a cathode, a media flow path leading to the anode, a media flow path leading to the cathode, an anode exhaust-gas flow path, a cathode exhaust-gas flow path, a fan inserted in the media flow path leading to the ca
1. A method for operating a fuel cell system having a fuel cell unit with an anode and a cathode, a media flow path leading to the anode, a media flow path leading to the cathode, an anode exhaust-gas flow path, a cathode exhaust-gas flow path, a fan inserted in the media flow path leading to the cathode for supplying air to the cathode, and a catalytic burner arranged in the cathode exhaust-gas flow path, said method comprising:introducing an anode exhaust gas into, and mixing the anode exhaust gas with a cathode exhaust gas in, at least one of the catalytic burner and the cathode exhaust-gas flow path upstream of the catalytic burner; converting the anode exhaust gas and the cathode exhaust gas into a combined catalytically converted fuel cell exhaust flow in the catalytic burner, passing the combined catalytically converted fuel cell exhaust flow from the catalytic burner into an expansion machine; and feeding the fuel cell unit with a lower excess of hydrogen in part-load operation than in full-load operation. 2. The method according to claim 1, wherein the fuel cell unit is fed with a hydrogen excess of at most 10% in part-load operation, and is fed with a hydrogen excess of at least 20% in full-load operation.3. The method according to claim 1, wherein one of the cathode exhaust gas and the anode exhaust gas, is heated to a first temperature of between 150° C. and 1100° C. in the catalytic burner.4. The method according to claim 1, wherein a fuel is metered to the catalytic burner for combustion of the cathode exhaust gas.5. The method according to claim 4, wherein metering of the fuel into the catalytic burner is controlled based on data from a characteristic diagram of a control device, which diagram includes a temperature drop of the cathode exhaust gas across the expansion machine as a function of a pressure ratio of the expansion machine.6. The method according to claim 5, wherein the cathode exhaust gas is heated in the catalytic burner to a high temperature at which the expansion machine and the fan interact as a generator, whereby the generator increases the useful power of the fuel cell system.7. The method according to claim 1, wherein:the fuel cell system comprises a plurality of the fuel cell unit arranged into a plurality of fuel cell stacks; at least two fuel cell stacks are connected in parallel in terms of flow; and at least one fuel cell stack is arranged in series in terms of flow with the at least two fuel cell stacks connected in parallel.
이 특허에 인용된 특허 (2)
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Sederquist ; Richard A., Fuel cell power plant and method for operating the same.
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Bloomfield David P. (West Hartford CT) Cohen Ronald (West Hartford CT), Pressurized fuel cell power plant.
이 특허를 인용한 특허 (6)
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Arthur, David A.; Alp, Abdullah B., Exhaust emissions control of hydrogen throughout fuel cell stack operation.
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Lamm, Arnold, Fuel cell system having at least one fuel cell.
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Johnson,Larry L., Power system for a telecommunication facility.
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Johnson, Robert Paul, Solar-powered, liquid-hydrocarbon-fuel synthesizer.
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Salvador, John P.; Lakshmanan, Balsu; Alp, Abdullah B.; Arthur, David A., Strategies for mitigating cell degradation during start-up and shutdown with H2/N2 storage.
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Varatharajan, Balachandar; Balan, Chellappa; Bowman, Michael John, Systems and methods of reducing NO emissions in gas turbine systems and internal combustion engines.
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