IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0693340
(2012-12-04)
|
등록번호 |
US-8623560
(2014-01-07)
|
우선권정보 |
FI-20105636 (2010-06-04) |
발명자
/ 주소 |
- Åströ, Kim
- Hottinen, Tero
|
출원인 / 주소 |
|
대리인 / 주소 |
Buchanan Ingersoll & Rooney PC
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
2 |
초록
▼
A method to control the heat balance of fuel cell stacks in a fuel cell system, the fuel cell system including at least one fuel cell unit including fuel cell stacks, whose fuel cells include an anode side and a cathode side, as well as an electrolyte interposed therebetween, and a recuperator unit
A method to control the heat balance of fuel cell stacks in a fuel cell system, the fuel cell system including at least one fuel cell unit including fuel cell stacks, whose fuel cells include an anode side and a cathode side, as well as an electrolyte interposed therebetween, and a recuperator unit for heat exchange for preheating a supply flow of the cathode side. In the method, a desired portion is separated from the fuel exhaust flow coming from the anode side and adapted to be mixed with the cathode side exit flow before said recuperator unit. Also provided is a fuel cell system implementing the method.
대표청구항
▼
1. A method to control a heat balance of fuel cell stacks in a fuel cell system, said fuel cell system including at least one fuel cell unit comprising fuel cell stacks, whose fuel cells include an anode side and a cathode side, as well as an electrolyte interposed therebetween, the method comprisin
1. A method to control a heat balance of fuel cell stacks in a fuel cell system, said fuel cell system including at least one fuel cell unit comprising fuel cell stacks, whose fuel cells include an anode side and a cathode side, as well as an electrolyte interposed therebetween, the method comprising separating a desired portion from a fuel exhaust flow of the anode side, and supplying the desired portion into a fuel stack compartment surrounding the fuel cell units. 2. The method according to claim 1, wherein the portion separated from the fuel exhaust flow of the anode side is adapted to be mixed with the cathode side exit flow before a recuperator unit arranged for preheating a supply flow of the cathode side. 3. The method according to claim 1, wherein said portion lies between 0-50%, based on the fuel exhaust flow of the anode side. 4. The method according to claim 1, wherein the separation of the portion from of the fuel exhaust flow is accomplished after heat exchange arranged between said exhaust flow and a fuel supply flow entering the anode side of the fuel cells. 5. The method according to claim 1, wherein at least a part of the portion is bled from the stack fuel outlet flow already within the stack compartment that surrounds the fuel cells. 6. The method according to claim 5, wherein the bleeding is accomplished in the stack compartment by a device arranged to the piping of the fuel exhaust flow. 7. The method according to claim 1, wherein a control of the bleeding is accomplished by using an active control of a pressure on the anode side. 8. The method according to claim 1, wherein said portion lies between 0-15%, based on the fuel exhaust flow of the anode side. 9. The method according to claim 1, wherein said portion lies between 0-12%, based on the fuel exhaust flow of the anode side. 10. A heat balance control system of fuel cell stacks in a fuel cell system, said fuel cell system including at least one fuel cell unit comprising fuel cell stacks, whose fuel cells include an anode side and a cathode side, as well as an electrolyte interposed therebetween, the heat balance control system comprising an arrangement wherein a desired portion has been adapted to be separated from a fuel exhaust flow of the anode side and to be supplied into a fuel stack compartment surrounding the fuel cells. 11. The system according to claim 10, wherein the portion separated from the fuel exhaust flow of the anode side has been adapted to be mixed with the cathode side exit flow prior to entering a recuperator unit arranged for preheating a supply flow of the cathode side. 12. The system according to claim 10, wherein said portion lies between 0-50%, based on the fuel exhaust flow of the anode side. 13. The system according to claim 10, wherein the separation of the portion from of the fuel exhaust flow has been adapted to be accomplished after heat exchange arranged between said exhaust flow and a fuel supply flow entering the anode side of the fuel cells. 14. The system according to claim 10, wherein at least a part of the portion has been adapted to be bled from the stack fuel outlet flow already in the stack compartment that surrounds the fuel cells. 15. The system according to claim 14, wherein the bleeding has been accomplished in the stack compartment by a device arranged to the piping of the said fuel exhaust flow. 16. The system according to claim 10, wherein the control of the bleeding has been accomplished by using an active control of a pressure on the anode side. 17. The system according to claim 10, wherein said portion lies between 0-15%, based on the fuel exhaust flow of the anode side. 18. The system according to claim 10, wherein said portion lies between 0-12%, based on the fuel exhaust flow of the anode side.
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