WO2008052584A1 - Ventilsystem für ein brennstoffzellensystem, brennstoffzellensystem sowie verfahren zur überwachung des betriebszustandes einer ventilvorrichtung - Google Patents
Ventilsystem für ein brennstoffzellensystem, brennstoffzellensystem sowie verfahren zur überwachung des betriebszustandes einer ventilvorrichtung Download PDFInfo
- Publication number
- WO2008052584A1 WO2008052584A1 PCT/EP2006/010509 EP2006010509W WO2008052584A1 WO 2008052584 A1 WO2008052584 A1 WO 2008052584A1 EP 2006010509 W EP2006010509 W EP 2006010509W WO 2008052584 A1 WO2008052584 A1 WO 2008052584A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- medium
- operating state
- fuel cell
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0066—Hydraulic or pneumatic means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- the invention relates to a valve system with self-monitoring of the valve system operating state with a valve device comprising at least one medium input, a medium output and a control output as connections, wherein the medium output and control output are switched to the medium input in a medium-conducting connection, with a medium sensor system, the operationally the control output is coupled and with a
- An evaluation device configured to detect, based on the measurement signal of the medium sensor system, the operating state of the valve device, a gas-fueled fuel cell system comprising a plurality of valves, and a method for monitoring the operating state of a valve device.
- Valves for switching pneumatic or hydraulic systems are known in a variety of variations. Especially with complex or safety-relevant systems, it is customary to monitor the current state of the valves.
- One of many examples of such valve status monitoring is described in document WO 2006 / 004442A1.
- This document deals with a valve which can assume a plurality of operating states: In an open operating state, a fluid-conducting connection between inlet and outlet of the valve is formed. In a closed mode, this connection is broken. In a purge operating state, the valve is switched so that cleaning liquid can be introduced through the outlet of the valve and this is guided via a separate chamber to a cleaning outlet. The cleaning outlet is monitored by a flow meter. In addition to the detection of a fluid flow during the cleaning process, any leaking through a leak fluid is detected in the closed operating state of the valve and reported, if necessary. This document is probably the closest prior art.
- valves that connect between anode and cathode gas cycle or between anode gas cycle and the environment It is also known to monitor different valves in fuel cell systems for safety reasons, such as valves that connect between anode and cathode gas cycle or between anode gas cycle and the environment.
- the monitoring of the valves in a fuel cell system is usually carried out by a complex leak test during startup or during the shutdown procedure of the fuel cell system.
- This object is achieved by a valve system having the features of claim 1, a fuel cell system having the features of claim 9 and by a method having the features of claim 11.
- Preferred and / or advantageous embodiments are given by the dependent claims, the following description and / or the accompanying drawings.
- valve system according to the invention is suitable and / or designed for a fuel cell system, wherein the valve system is a self-monitoring of
- Valve system operating state has.
- the valve system has a valve device which comprises at least one medium input, a medium output and a control output as connections.
- a medium output and a control output as connections.
- further medium outputs or inputs can be provided.
- the medium output and the control output are in each case alternatively switchable into a medium-conducting connection with the medium input, in particular in such a way that a system pressure applied to the medium input is also present at the medium outlet or at the control outlet.
- the valve system further has a medium sensor system, which is operatively coupled to the control output, and an evaluation device, which is designed in terms of programming and / or circuitry to detect the operating state of the valve device on the basis of the measurement signal of the medium sensor.
- the medium sensor system is designed as a pressure measuring sensor system which terminates the control output.
- the pressure measuring sensor system closes the control output dead-end and / or completely sealing off.
- the idea underlying the invention is to replace a commonly used valve by a valve with an additional output and to connect a pressure sensor to the additional output, which is sealed by the pressure sensor.
- the operating state of the valve system, in particular of the valve device can be determined in a simple, trouble-free manner.
- Valve device formed as a 3/2 valve, wherein preferably a 2/2-valve common design is replaced by a 3/2-valve for the valve system according to the invention.
- the valves or directional control valves are described according to the number of connections and the number of switching positions.
- a 3/2 valve accordingly has three ports and two shift positions.
- the valve device is designed as a shuttle valve with exactly two switching positions, wherein in the first switching position of Medium output with the medium input is in medium-conducting connection and in the second switching position, the control output is in medium-conducting connection with the medium input.
- the pressure-measuring sensor system or the pressure sensor can be designed as absolute pressure-measuring sensors or as relative-pressure sensors. The latter is preferred but only used when the ambient pressure does not vary greatly over time.
- the evaluation device is designed to detect an open operating state.
- the medium outlet is open and closed in medium-conducting connection with the meidome input and the control output.
- the pressure measuring sensor system is isolated from the prevailing in the valve device system pressure due to the closed control output.
- the pressure measured with the pressure measuring device is thus constant or quasi-constant and corresponds to the pressure which prevailed shortly before the last opening of the valve device at the control outlet.
- a stationary and / or quasi-stationary waveform of the measuring signal of the pressure measuring sensor is transmitted, where the evaluation device detects the open operating state of the valve device.
- the evaluation device detects a closed operating state, wherein the medium output is closed and the control output is opened.
- the control output is in medium communication with the medium input.
- the system pressure in particular of the fuel cell system, which is applied in the valve device and / or the medium input is recorded by the pressure-measuring sensor system.
- this applied system pressure is constantly changing. For example, changes occur when pulsations prevail in the system, such as a pulsed hydrogen valve or a screw compressor.
- the pressure measuring sensor generates a measuring signal with a proportional to the system pressure of the fuel cell system or approximately proportional waveform.
- This measurement signal is transmitted to the evaluation device, which recognizes the closed operating state of the valve device on the basis of the time-varying signal curve of the measurement signal.
- the evaluation device recognizes the closed operating state on a particular temporal correlation of measurement signals of the system pressure and the pressure measuring sensor.
- the evaluation device is designed to detect a leaking operating state, wherein a leakage of the closure of the control output is detected.
- This operating state can be detected when the medium output is open and the control output is closed.
- a measurement signal is generated by the pressure measuring sensor with a waveform in which a stationary and / or quasi-stationary waveform with Interference due to changes in system pressure is superimposed.
- This leaking condition is, for example, when the valve device is defective and the control output is not fully closed or leaking, and the control output is in fluid communication with the fluid inlet, albeit possibly slightly.
- the detection and thus the monitoring of the leaking operating state can optionally also be used to check the function of the self-monitoring, so that, for example, upon detection of the leaking operating state, the valve system outputs an error message.
- Another object of the invention relates to a fuel cell system with a gas supply, wherein the gas supply comprises a plurality of valves, characterized in that at least one valve is designed as a valve system according to one of the preceding claims or the preceding description.
- the integration of the valve system according to the invention in the gas supply of a fuel cell system is particularly advantageous because on the one hand in fuel cell systems no suitable solutions for monitoring the valves exist and on the other hand, the gas supply of fuel cell systems represent a dynamic system in which the system pressure changes over time.
- valve system By means of the valve system according to the invention, it can be clearly distinguished whether the measured pressure of the pressure measuring sensor system is constant and the valve device has switched the medium input to the medium outlet or if it fluctuates and / or correlates with the system pressure, in particular temporally and the valve device is closed in the direction of the medium outlet. A safe determination of the operating condition, in particular the position of Valve device can thus be achieved by the evaluation device.
- the valve system is used as an anode air valve, anode purge valve and / or drain valve.
- the anode air valve or the anode purge valve is used to expel contaminated anode gas jerky (purge) from the fuel cell system.
- the drain valve serves to dissipate any condensation water or water produced by the electrochemical reaction from the gas supply.
- Another object relates to a method for monitoring the operating state of a valve device, in particular using the valve system according to the invention and / or in a fuel cell system according to the invention.
- the inventive method provides that the valve device is switchable between an open operating state and a closed operating state, in particular exclusively between these two states is switchable.
- a medium input is connected medium-conducting to a medium output
- a closed switching state the medium input is connected to a control output in a medium-conducting manner.
- the pressure in the control output is measured by means of a pressure-measuring sensor, which is arranged sealingly or in the manner of a sack-like passage and which terminates the control outlet.
- FIG. 1 shows a fuel cell system as a functional block with a valve device in the open operating state as a first embodiment of the invention.
- FIG. 2 shows the fuel cell system in FIG. 1 with the valve device in a closed operating state.
- FIG. 1 shows a fuel cell system 1 as a functional block, which has a gas supply, in which at least one valve device 2, for example as a drain valve, purge valve or anode air purge valve, is arranged.
- a valve device 2 for example as a drain valve, purge valve or anode air purge valve
- the valve device 2 has a medium inlet 3 into which the medium, in particular anode or cathode gas, flows according to the flow direction arrow 4. Furthermore, the valve device 2 has a medium outlet 5, from which, in the opened state of the valve device 2, as shown in FIG. 1, the medium can flow out in the direction of the arrow 6. In addition, a control output 7 is provided, which is sealed with a switchable sealing device 8 in the open operating state of the valve device 2 shown in Figure 1 with respect to the Innraum the valve device 2 and thus against the medium input 3.
- a pressure measuring sensor Pl is sealingly inserted, which closes the control output 7 sackgassenartig or sealing.
- the measurement signals generated by the pressure measuring sensor Pl are forwarded to an evaluation device 9, which recognizes the operating state of the valve device 2 on the basis of the measurement signals.
- the evaluation device is designed, for example, as a data processing device, PC, DSP, microcontroller or the like.
- FIG. 2 shows the fuel cell system 1 with the valve device 2 in a further switching state, the closed operating state, wherein the sealing device 8 has now been switched from the control output 7 to the medium output 5, so that the medium outlet 5 is sealingly closed. Also in this operating state, the measurement signals of the pressure measuring sensor Pl are forwarded to the evaluation device 9.
- the detection of the operating state of the valve device 2 is performed as follows:
- the control output 7 is opened, so that the same pressure is applied to the pressure measuring sensor P1 as at the medium inlet 3.
- the one on the Medium input 3 applied pressure corresponds to the system pressure of the fuel cell system 1.
- This system pressure is not constant, but is usually time-varying or pulsates due to clocked hydrogen valves in the case of Anodengas Vietnamesees or due to a screw compressor in the case of Kathodengas Vietnamesees. Accordingly, the pressure measuring sensor Pl will not measure a constant pressure, but a pressure with a temporal amplitude curve, wherein the amplitude is proportional or approximately proportional to the system pressure of the fuel cell system 1 is formed.
- the evaluation device can now easily distinguish between the open operating state and the closed operating state by virtue of whether there is a constant or quasi-constant measuring signal or a measuring signal which changes over time and in particular correlates with the system pressure in terms of time.
- a leak can also be detected at the control output.
- the sealing device 8 does not completely seal off the control output 7, for example due to contamination or mechanical defects
- no constant measuring signal is transmitted to the evaluation device 9 by the pressure measuring sensor P1
- a constant signal which is superimposed with disturbances.
- these disturbances are less developed than the amplitudes in the measurement signal in the closed operating state of the valve device 2.
- the detection of a leak at the control output can optionally trigger an error message.
- the invention allows a relatively simple valve monitoring of critical valves.
- a signal output of the evaluation device 9 with the detected operating states can be guided, for example, in a higher-level control for further processing.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fuel Cell (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2006/010509 WO2008052584A1 (de) | 2006-11-02 | 2006-11-02 | Ventilsystem für ein brennstoffzellensystem, brennstoffzellensystem sowie verfahren zur überwachung des betriebszustandes einer ventilvorrichtung |
| DE112006004096T DE112006004096A5 (de) | 2006-11-02 | 2006-11-02 | Ventilsystem für ein Brennstoffzellensystem, Brennstoffzellensystem sowie Verfahren zur Überwachung des Betriebszustandes einer Ventilvorrichtung |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2006/010509 WO2008052584A1 (de) | 2006-11-02 | 2006-11-02 | Ventilsystem für ein brennstoffzellensystem, brennstoffzellensystem sowie verfahren zur überwachung des betriebszustandes einer ventilvorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008052584A1 true WO2008052584A1 (de) | 2008-05-08 |
Family
ID=38230119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2006/010509 Ceased WO2008052584A1 (de) | 2006-11-02 | 2006-11-02 | Ventilsystem für ein brennstoffzellensystem, brennstoffzellensystem sowie verfahren zur überwachung des betriebszustandes einer ventilvorrichtung |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE112006004096A5 (de) |
| WO (1) | WO2008052584A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011105054A1 (de) * | 2011-06-21 | 2012-12-27 | Volkswagen Aktiengesellschaft | Verfahren zum Betreiben einer Brennstoffzelle sowie Brennstoffzelle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5560392A (en) * | 1995-03-29 | 1996-10-01 | Postberg Anne Karin M | Valve for a measuring device |
| WO2003042586A1 (en) * | 2001-11-13 | 2003-05-22 | Emech Control Limited (Formerly Technology Development Group Limited) | Process control valve |
| WO2005010415A1 (de) * | 2003-07-24 | 2005-02-03 | Alois Schwarz | Mehrwegeventil |
| EP1691115A1 (de) * | 2005-02-14 | 2006-08-16 | Hans Sasserath & Co Kg | Ventilanordnung mit druckabhängig gesteuertem Ventil |
-
2006
- 2006-11-02 WO PCT/EP2006/010509 patent/WO2008052584A1/de not_active Ceased
- 2006-11-02 DE DE112006004096T patent/DE112006004096A5/de not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5560392A (en) * | 1995-03-29 | 1996-10-01 | Postberg Anne Karin M | Valve for a measuring device |
| WO2003042586A1 (en) * | 2001-11-13 | 2003-05-22 | Emech Control Limited (Formerly Technology Development Group Limited) | Process control valve |
| WO2005010415A1 (de) * | 2003-07-24 | 2005-02-03 | Alois Schwarz | Mehrwegeventil |
| EP1691115A1 (de) * | 2005-02-14 | 2006-08-16 | Hans Sasserath & Co Kg | Ventilanordnung mit druckabhängig gesteuertem Ventil |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011105054A1 (de) * | 2011-06-21 | 2012-12-27 | Volkswagen Aktiengesellschaft | Verfahren zum Betreiben einer Brennstoffzelle sowie Brennstoffzelle |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112006004096A5 (de) | 2009-10-01 |
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