IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0379370
(2009-02-19)
|
등록번호 |
US-8227125
(2012-07-24)
|
우선권정보 |
KR-10-2008-0088952 (2008-09-09) |
발명자
/ 주소 |
- Heo, Jin S.
- Higashi, Takami
- Oh, Jae Hyuk
|
출원인 / 주소 |
- Samsung Electronics Co., Ltd.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
3 |
초록
▼
A stable fuel supply system in a fuel cell system produces heat and electricity by combining hydrogen modified from a major raw material selected from various hydrogen compounds, with oxygen existing in air. A fuel supply device and a fuel supply method in a fuel cell system, which automate a steam
A stable fuel supply system in a fuel cell system produces heat and electricity by combining hydrogen modified from a major raw material selected from various hydrogen compounds, with oxygen existing in air. A fuel supply device and a fuel supply method in a fuel cell system, which automate a steam to carbon ratio (S/C) control and a lamda control, and achieve a fuel cell system operation efficiently and stably coping with pressure loss and pulsation occurring within the system, while using a minimum number of balance-of-plant (BOP) units. A method more efficiently and precisely supplies fuel during the start-up and operation of the fuel cell system, while preventing flame failure of a burner and maintaining an appropriate carbon monoxide concentration even when an abrupt flow rate variation occurs. Also, an operating method improves functions associated with a decomposition ability based on selection of the specification of a fuel pump, and thus, is more economical and stable in terms of the costs and configuration of the fuel cell system.
대표청구항
▼
1. A fuel cell system comprising: a fuel treating unit to modify fuel to produce modified gas;a stack to receive the modified gas from the fuel treating unit to generate energy;a fuel supplying unit to supply the fuel to the fuel treating unit, the fuel supplying unit comprising a fuel pump to suppl
1. A fuel cell system comprising: a fuel treating unit to modify fuel to produce modified gas;a stack to receive the modified gas from the fuel treating unit to generate energy;a fuel supplying unit to supply the fuel to the fuel treating unit, the fuel supplying unit comprising a fuel pump to supply the fuel to the fuel treating unit and a flow meter to detect an actual fuel supply amount of the fuel pump; anda controller to determine a fuel supply amount required for a real-time operation of the fuel treating unit based on the detected fuel supply amount of the fuel pump, and to control the fuel supplying unit to supply the determined fuel supply amount. 2. The fuel cell system according to claim 1, wherein: the fuel treating unit comprises a reformer to modify the fuel, and a burner to heat the reformer; andthe fuel supplying unit comprises a first fuel supplier to control a total supply amount of the fuel supplied to the fuel treating unit, and a second fuel supplier to control fuel supply amounts respectively supplied to the reformer and the burner. 3. The fuel cell system according to claim 2, wherein the first fuel supplier comprises a fuel pump to supply the fuel to the fuel treating unit, and the fuel pump supplies a fuel amount equal to a sum of the fuel supply amount supplied to the reformer as a supply amount of reformer fuel and the fuel supply amount supplied to the burner as a supply amount of burner fuel. 4. The fuel cell system according to claim 3, wherein the first fuel supplier controls the total supply amount of the fuel, wherein the fuel pump supplies the fuel in an amount greater than the sum of the reformer and burner fuel supply amounts, to cause the fuel to be pressurized. 5. The fuel cell system according to claim 3, wherein the second fuel supplier comprises a valve to supply the reformer fuel to the reformer, and the valve controls the flow of reformer fuel to supply the reformer fuel supply amount required for the reformer. 6. The fuel cell system according to claim 3, wherein the second fuel supplier comprises a valve to supply the burner fuel to the burner, and the valve controls the flow of the burner fuel to supply the burner fuel supply amount required for the burner. 7. A fuel cell system comprising: a fuel treating unit to modify fuel to produce hydrogen;a stack to generate energy through an electrochemical reaction of the hydrogen with oxygen;a fuel supplying unit to supply the fuel to the fuel treating unit, the fuel supplying unit comprising a fuel pump to supply the fuel to the fuel treating unit and a flow meter to detect an actual fuel supply amount of the fuel pump; anda main controller to control the fuel supplying unit, wherein the fuel supplying unit supplies a supply amount of reformer fuel required in real time for a reformer to perform the modification based on the detected fuel supply amount of the fuel pump, and a supply amount of burner fuel required in real time for a burner to heat the reformer. 8. The fuel cell system according to claim 7, wherein the fuel supplying unit comprises a first fuel supplier to control a total supply amount of the fuel supplied to the reformer and the burner, and a second fuel supplier to control supply amounts of the fuel respectively supplied to the reformer and the burner. 9. The fuel cell system according to claim 8, wherein: the first fuel supplier comprises a fuel pump to supply the total supply amount of the fuel supplied to the reformer and the burner, and a first flow meter to detect the total fuel amount; andthe fuel pump supplies a fuel amount equal to a sum of the supply amount of the fuel respectively supplied to the reformer and the burner as reformer fuel and burner fuel. 10. The fuel cell system according to claim 8, wherein: the first fuel supplier comprises a fuel pump to supply the total supply amount of the fuel supplied to the reformer and the burner, and a first flow meter to detect the total fuel amount; andthe fuel pump supplies a fuel amount greater than a sum of the supply amounts of the fuel respectively supplied to the reformer and the burner as reformer fuel and burner fuel. 11. The fuel cell system according to claim 9, wherein the first fuel supplier further comprises a first controller to determine an operation of the fuel pump based on an external supply pressure of the fuel. 12. The fuel cell system according to claim 11, wherein the main controller determines the fuel supply amount of the fuel pump based on a set point of the reformer fuel supply amount and a set point of the burner fuel supply amount, compares the determined fuel supply amount of the fuel pump with a fuel supply amount of the fuel pump detected by the first flow meter, and adjusts a power of the fuel pump based on a result of the comparison. 13. The fuel cell system according to claim 11, wherein the fuel pump is stopped when a sum of a set point of the reformer fuel supply amount and a set point of the burner fuel supply amount is less than a predetermined minimum supply amount value. 14. The fuel cell system according to claim 9, wherein the second fuel supplier comprises a reformer fuel supply line to control the supply amount of the reformer fuel supplied to the reformer, and a burner fuel supply line to control the supply amount of the burner fuel supplied to the burner. 15. The fuel cell system according to claim 14, wherein: the reformer fuel supply line comprises a first valve to adjust a supply ratio of the reformer fuel supplied to the reformer; andthe burner fuel supply line comprises a second valve to adjust a supply ratio of the burner fuel supplied to the burner, and a second flow meter to detect a flow rate of fuel passing through the second valve. 16. The fuel cell system according to claim 15, wherein the first and second valves are proportional valves connected to the fuel pump, to precisely control a flow rate of the reformer fuel and a flow rate of the burner fuel, respectively. 17. The fuel cell system according to claim 15, wherein the first valve is adjusted in opening degree based on a comparison of the reformer fuel supply amount determined by the main controller using a difference between values detected by the first and second flow meters. 18. The fuel cell system according to claim 15, wherein the second valve is adjusted in opening degree based on a difference determined by a comparison of the burner fuel supply amount determined by the main controller with a and a value detected by the second flow meter. 19. The fuel cell system according to claim 15, wherein the main controller controls the first valve to be closed when the set point of the reformer fuel supply amount is not greater than a predetermined minimum value. 20. The fuel cell system according to claim 15, wherein the main controller controls the second valve to be closed when the set point of the burner fuel supply amount is not greater than a predetermined minimum value. 21. The fuel cell system according to claim 15, wherein the main controller controls the first valve to be closed when the set point of the reformer fuel supply amount is not greater than a predetermined minimum value for the reformer fuel supply amount, controls the second valve to be closed when the set point of the burner fuel supply amount is not greater than a predetermined minimum value for the burner fuel supply amount, and controls the fuel pump to be stopped when the first and second valves are closed. 22. A fuel supply method of a fuel cell system to generate energy through an electrochemical reaction of hydrogen produced through modification of fuel with oxygen, comprising: determining an actual supply amount of reformer fuel supplied to a reformer to perform the modification;determining a supply amount of burner fuel supplied to a burner to heat the reformer;determining a fuel supply amount of a fuel pump based on the determined reformer fuel supply amount and the determined burner fuel supply amount, and controlling an operation of the fuel pump based on the determined fuel supply amount of the fuel pump; andcontrolling a flow rate of fuel supplied to the reformer and a flow rate of fuel supplied to the burner, wherein the flow rates supply, in real time, the determined reformer and burner fuel supply amounts. 23. The fuel supply method according to claim 22, wherein the controlling the operation of the fuel pump comprises operating the fuel pump to cause the fuel supply amount of the fuel pump to be equal to a sum of the reformer fuel supply amount and the burner fuel supply amount. 24. The fuel supply method according to claim 22, wherein the controlling the operation of the fuel pump comprises operating the fuel pump to cause the fuel pump to supply the fuel in an amount greater than a sum of the reformer fuel supply amount and the burner fuel supply amount, in a pressurized state, to adjust a total supply amount of the fuel supplied to the reformer and the burner. 25. The fuel supply method according to claim 22, wherein the controlling the operation of the fuel pump comprises stopping the fuel pump when a fuel amount equal to a sum of the reformer fuel supply amount and the burner fuel supply amount is supplied by an external supply pressure of the fuel. 26. The fuel supply method according to claim 22, wherein the controlling, in real time, the flow rate of fuel supplied to the reformer and the flow rate of fuel supplied to the burner comprises: providing a second valve and a flow meter in a burner fuel supply line, and controlling the flow rate of fuel supplied to the burner to supply the determined burner fuel supply amount based on an adjustment of an opening degree of the second valve and a flow rate detection of the flow meter; andproviding a first valve in a reformer fuel supply line, and controlling the flow rate of fuel supplied to the reformer to supply the determined reformer fuel supply amount based on an adjustment of an opening degree of the first valve and a detection of a difference between a fuel supply amount detected by the flow meter and an actual fuel supply amount of the fuel pump.
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