IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0178863
(2002-06-24)
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발명자
/ 주소 |
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출원인 / 주소 |
- Delphi Technologies, Inc.
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인용정보 |
피인용 횟수 :
5 인용 특허 :
13 |
초록
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In a solid-oxide fuel cell system, the fuel cell tail gas contains significant residual amounts of combustibles which are burned in a combustor with spent cathode air to reduce system emissions and to reclaim chemical energy in the form of heat, the hot exhaust being used to pre-heat air entering th
In a solid-oxide fuel cell system, the fuel cell tail gas contains significant residual amounts of combustibles which are burned in a combustor with spent cathode air to reduce system emissions and to reclaim chemical energy in the form of heat, the hot exhaust being used to pre-heat air entering the fuel cell system. The tail gas combustibles content can vary widely as can the combustion temperature. When the temperature becomes unacceptably low, a control valve in the spent cathode air return is adjusted to divert a portion of the air around the combustor, thus enriching the fuel/air mixture and causing the combustion temperature to increase. When the temperature becomes unacceptably high, a control valve in the combustor fresh air supply is adjusted to provide more air, thus causing the mixture to become leaner and the combustion temperature to decrease.
대표청구항
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What is claimed is: 1. In fuel cell system for generating electric power by combination of oxygen with hydrogen-containing fuel, the system having a combustor for burning a mixture of anode tail gas, spent cathode air, and fresh air, a system for controlling combustion temperature in the combustor,
What is claimed is: 1. In fuel cell system for generating electric power by combination of oxygen with hydrogen-containing fuel, the system having a combustor for burning a mixture of anode tail gas, spent cathode air, and fresh air, a system for controlling combustion temperature in the combustor, comprising: a) temperature measuring means within said combustor; b) first conduit means for providing said spent cathode air to said combustor, said first conduit means including a three-way valve for controllably diverting a portion of said spent cathode air from entering said combustor; c) second conduit means for providing fresh air to said combustor, said second conduit means including a control valve for controllably varying the amount of air flowing to said combustor; and d) control means for monitoring said combustion temperature via said temperature measuring means and for responding when said combustor temperature is out of a predetermined operating range, said control means being operationally connected to said three-way valve to provide less spent cathode air to said combustor when said operating temperature is below a lower limit of said range, and being further operationally connected to said control valve to provide more fresh air to said combustor when said operating temperature is above an upper limit of said range. 2. In a fuel cell system having a combustor for burning anode tail gas, spent cathode air, and fresh air together to produce a hot exhaust, a method for controlling combustion temperature in the combustor within a predetermined operating range, comprising the steps of: a) providing means for measuring temperature within said combustor; b) providing first conduit means for conveying said spent cathode air to said combustor, said first conduit means including a three-way valve for controllably diverting a portion of said spent cathode air from entering said combustor; c) providing second conduit means for providing fresh air to said combustor, said second conduit means including a control valve for controllably varying the amount of air flowing to said combustor; d) adjusting said three-way valve to provide less spent cathode air to said combustor when said operating temperature is below a lower limit of said range; and e) adjusting said control valve to provide more fresh air to said combustor when said operating temperature is above an upper limit of said range. 3. A fuel cell system in accordance with claim 1 wherein said system is mounted on a vehicle. 4. A fuel cell system in accordance with claim 3 wherein said vehicle is selected from the group consisting of car, truck, boat, and airplane. 5. A fuel cell system in accordance with claim 4 wherein said system is an auxiliary power unit for said vehicle. 6. An automotive vehicle, comprising a fuel cell system for generating auxiliary power for said vehicle, said system including a combustor for burning a mixture of anode tail gas and air, temperature measuring means within said combustor, first conduit means for providing spent cathode air to said combustor, said first conduit means including a three-way valve for controllably diverting a portion of said spent cathode air from entering said combustor, second conduit means for providing fresh air to said combustor, said second conduit means including a control valve for controllably varying the amount of air flowing to said combustor, and control means for monitoring said combustion temperature via said temperature measuring means and for responding when said combustor temperature is out of a predetermined operating range, said control means being operationally connected to said three-way valve to provide less spent cathode air to said combustor when said operating temperature is below a lower limit of said range, and being further operationally connected to said control valve to provide more fresh air to said combustor when said operating temperature is above an upper limit of said range.
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