Patent US6203935B1 successfully refreshed from Google Patents.
US6203935B1
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Method for operating a fuel cell system and fuel cell system
Assignee: Siemens AG
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Filing: 1999-03-11
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Granted: 2001-03-20
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Expires: 2019-03-11
Abstract
Abstract A fuel cell system having a fuel cell block is operated by compressing an operating agent for the fuel cell block with a liquid ring compressor. After compressing the operating agent, water is separated from the operating agent in an apparatus for water separation. The fuel cell block is cooled with the water and, after the cooling, at least a portion of the water is fed back into the apparatus for water separation. This measure reduces the number of components which form the fuel cell system.
Inventors
- 👤 Walter Stühler
- 👤 Herbert Stenger
- 👤 Harry Gellert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:40
CPC Classifications
H; H01; H01M; H01M8/00; H01M8/04; H01M8/04082; H01M8/04089; H01M2300/00; H01M2300/0017; H01M2300/0065; H01M2300/0082; H01M8/04007; H01M8/04029; H01M8/04119; H01M8/04156; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
69 words
A method for operating a fuel cell system having a fuel cell block, the method which comprises: compressing an operating agent for a fuel cell block with a liquid ring compressor; subsequently separating water from the operating agent in an apparatus for water separation; cooling the fuel cell block with the water; and subsequently feeding back at least a portion of the water into the apparatus for water separation.
Claim 2
Independent Claim
69 words
A method for operating a fuel cell system having a fuel cell block, the method which comprises: compressing an operating agent for a fuel cell block with a liquid ring compressor; subsequently separating water from the operating agent in an apparatus for water separation; cooling the fuel cell block with the water; and subsequently feeding back at least a portion of the water into the apparatus for water separation.
Claim 3
Dependent Claim
23 words
The method according to claim 1 , which comprises using process water from the fuel cell block for cooling the fuel cell block.
Claim 4
Dependent Claim
86 words
A fuel cell system, comprising: a fuel cell block; a liquid ring compressor for compressing an operating agent for said fuel cell block; an apparatus for water separation connected between said liquid ring compressor and said fuel cell block in a feed path for supplying said fuel cell block with the operating agent; and a line connected between said fuel cell block and said apparatus, said line feeding water, after flowing through said fuel cell block and cooling said fuel cell block, back into said apparatus.
Claim 5
Dependent Claim
86 words
A fuel cell system, comprising: a fuel cell block; a liquid ring compressor for compressing an operating agent for said fuel cell block; an apparatus for water separation connected between said liquid ring compressor and said fuel cell block in a feed path for supplying said fuel cell block with the operating agent; and a line connected between said fuel cell block and said apparatus, said line feeding water, after flowing through said fuel cell block and cooling said fuel cell block, back into said apparatus.
Claim 6
Dependent Claim
37 words
The fuel cell system according to claim 3 , further comprising: a process water separator connected to said fuel cell block; and a further line for feeding process water from said process water separator into said apparatus.
Claim 7
Dependent Claim
36 words
The fuel cell system according to claim 3 , comprising a further line branching off from said line and opening into said liquid ring compressor for feeding part of the water into said liquid ring compressor.
References Cited (Backward Citations)
US5192627A
Cited
US5976722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-03-19 | 2004-09-18 | 2005-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-03-19 | 2008-09-18 | 2009-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-03-19 | 2012-09-18 | 2013-03-20 | $7700.00 | Window Closed / Lapsed |