IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0195244
(2005-08-02)
|
등록번호 |
US-7482080
(2009-01-27)
|
우선권정보 |
DE-10 2004 037 901(2004-08-05) |
발명자
/ 주소 |
- Heimburger,Stefan
- Heid,Thomas
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
1 인용 특허 :
2 |
초록
▼
A fuel cell system has a fuel cell unit for generating electric current and/or thermal heat, a cooling device provided for cooling the fuel cell unit and having at least one first flow generator for generating a flow of a first cooling fluid, in particular a liquid coolant, and a second flow generat
A fuel cell system has a fuel cell unit for generating electric current and/or thermal heat, a cooling device provided for cooling the fuel cell unit and having at least one first flow generator for generating a flow of a first cooling fluid, in particular a liquid coolant, and a second flow generator for generating a flow of a second cooling fluid, in particular a cooling air, in which a more-efficient temperature regulation is realized, compared to the prior art, with a control unit provided for comparison of a first operating parameter, or a change in the first operating parameter, of the first flow generator with a second operating parameter, or a change in the second operating parameter, of the second flow generator.
대표청구항
▼
The invention claimed is: 1. A method for operating a fuel cell system, comprising the following steps: providing a fuel cell unit for generating electric current and/or thermal heat; providing a cooling device for cooling said fuel cell unit, said cooling device having a heat exchanger unit, at le
The invention claimed is: 1. A method for operating a fuel cell system, comprising the following steps: providing a fuel cell unit for generating electric current and/or thermal heat; providing a cooling device for cooling said fuel cell unit, said cooling device having a heat exchanger unit, at least one first flow generator and at least one second flow generator; providing a control unit; generating a first flow of a first cooling water fluid by the at least one first flow generator, the first flow circulating the first cooling fluid through the fuel cell unit and the heat exchanger unit; generating a second flow of a second cooling air fluid by the at least one second flow generator, the second flow flowing the second cooling fluid through the heat exchanger unit; performing by the control unit a parameter comparison to obtain a comparison result, wherein the parameter comparison comprises comparing changes in a volume flow of the first flow and in power of the at least one second flow generator with predetermined operating parameters of the at least one first and second flow generators; regulating, according to the comparison result, at least one of the at least one first flow generator and the at least one second flow generator. 2. The method as defined in claim 1, wherein by means of the control unit for performing the parameter comparison, a power coefficient (Kη) is formed according to the following equation: wherein dQab,P represents a differential change of heat dissipation generated by the at least one first flow generator; dVW represents a differential change of the volume flow of the first cooling fluid; dPP represents a differential change of the power of the at least one first flow generator; dQab,L presents a differential change of the heat dissipation generated by means of the at least one second generator; dmL represents a differential change of the mass flow of the second cooling fluid; and dPL represents a differential change of the power of the at least one second flow generator. 3. The method as defined in claim 2, wherein by means of the control unit, an increase of rpm or power of the at least one first flow generator takes place, when Kη>0. 4. The method as defined in claim 2, wherein by means of the control unit, an increase of rpm or power of the second flow generator takes place, when Kη>0. 5. The method as defined in claim 1, wherein the comparison is performed by means of the control unit when a fuel cell temperature leaves a predetermined temperature range. 6. The method as defined in claim 1, wherein by means of the control unit, a comparison of at least two temperatures of the fuel cell unit and/or the cooling device takes place. 7. The method as defined in claim 6, wherein by means of the control unit, a change of at least the power and/or the rpm of the at least one first flow generator and/or the power and/or the rpm of the at least one second flow generator occurs as a function of the temperature comparison. 8. The method as defined in claim 1, wherein the heat exchanger unit exchanges heat between the first and second cooling fluids. 9. The method as defined in claim 8, wherein at least one performance graph of the heat exchanger unit is stored in the control unit. 10. The method of claim 9, wherein the performance graph of the heat exchanger unit is formed as a function of an operating parameter of the at least one first and second flow generators.
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