EP1450046A2 - Verfahren zum Betreiben von Turbokompressoren mit Pumpgrenzregelung - Google Patents
Verfahren zum Betreiben von Turbokompressoren mit Pumpgrenzregelung Download PDFInfo
- Publication number
- EP1450046A2 EP1450046A2 EP04000580A EP04000580A EP1450046A2 EP 1450046 A2 EP1450046 A2 EP 1450046A2 EP 04000580 A EP04000580 A EP 04000580A EP 04000580 A EP04000580 A EP 04000580A EP 1450046 A2 EP1450046 A2 EP 1450046A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- surge limit
- surge
- compressor
- limit control
- line
- 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.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
Definitions
- the invention relates to a method for the safe operation of Turbo compressors with one surge limit control and one Pump limit control valve, the compressor with gases different composition promotes and Composition of the gas (molecular weight) the map of the Turbo compressor and thus the position of the surge limit in the map affected.
- EP 0 810 358 A2 describes a method for regulating Gas pressures of a regenerator with a gas expansion turbine known in the flue gas pipe with a generator, being a Process controller the inlet fittings of a gas expansion turbine and / or the bypass fittings opens or the bypass fittings throttles.
- the process controller has several function generators downstream, which are the manipulated variables for the downstream Specify fittings.
- DE 100 12 380 A1 describes a method for Protection of a turbo compressor with a downstream process known an operation in the unstable work area, where a Machine controller is used in addition to a surge limit controller if necessary, a suction pressure regulator, a final pressure regulator and has a bypass controller. From the position of a flow the actuator determining the process is taken into account of possibly other influencing variables, such as Compressor suction pressure and compressor outlet pressure and Compressor intake temperature and the process pressure, a Tax matrix determined. Using the tax matrix, a rapid transient operating point change the required Position of the surge limit control valve and the bypass valve, the Suction pressure control valve and the actuator for the Compressor inlet blades determined directly. The determined The control variable is then the surge limit control valve, the Suction pressure regulator, the final pressure regulator and the bypass regulator directly activated as a manipulated variable.
- a Machine controller is used in addition to a surge limit controller if necessary, a suction pressure regulator, a final pressure regulator and has a bypass controller.
- EP 0 757 180 B1 describes a method for Avoiding controller instabilities in surge limit controls for Protection of a turbocompressor against pumps with a large selection Proportional gain of the surge limit controller by blowing off known via a relief valve.
- the timing of the The blow-off valve closes at an asymmetrically constructed gradient limiter, whereby in Opening direction no time limit is effective.
- the closing direction is a parameterizable time Limitation of the closing process of the relief valve is provided.
- the Location of the surge limit in the map of the compressor is known.
- the Coordinates of the working point in the map are usually as compression work or enthalpy difference or head plotted against the intake volume flow.
- the Parameters of the respective sizes can also be known.
- the present invention is based on the object Process for safely operating a turbo compressor specify that is able to also gases with different Safe to process composition, in particular with regard to the sizes for the gas constant R and the Isentropic exponent k is not well known.
- the underlying task is solved in that the different compositions of the gases with the influence on the location of the surge line and thus also the location of the Surge limit line can be compensated by within the Pump limit control for the detection of delivery head (Enthalpy difference) ⁇ h and volume flow V predetermined Design values for gas constant R, isentropic exponent k and Compressibility number z are used and in the form of a predetermined surge line (Fig. 2, Fig. 4) within the Pump limit control are mapped, with setpoint and actual value for the surge limit control can be determined from the figure and the compressor with the determined target and actual values for the Pump limit control with a minimum required distance from Pump limit is operated.
- the procedure for the safe operation of Turbo compressors with one surge limit control and one Pump limit control valve applicable in an advantageous manner, in which the compressor gases with different compositions promotes and the composition of the individual gases (Molecular weight) the map of the turbo compressor and thus leaves the position of the surge line in the map unaffected, whereby within the surge limit regulation for the detection of delivery head ⁇ h and volume flow V a predetermined design value for Gas constant R, isentropic exponent k and compressibility number z is used and in the form of a predetermined surge line (Fig. 1) is mapped within the surge limit control, wherein the setpoint for the surge limit control from the figure determined and the actual value calculated from the measured variables and the compressor with the determined target and Actual values for the surge limit control with a minimum required distance to the surge line is operated.
- One of the most important in the surge limit control Machine protection devices for turbo compressors is manufactured by Location of the surge limit in the map of a compressor made. Within the surge limit control, the Enthalpy difference the minimum permissible flow through the Compressor determined as setpoint for the surge limit controller. at Knowledge of enthalpy difference and volume flow is then one correct surge limit control and thus a safe one Machine protection possible.
- V K ⁇ p 1 ⁇ R ⁇ z ⁇ T 1 p 1 in which R equals gas constant k is the isentropic exponent z equals compressibility number T 1 is the temperature of the suction side p 1 equals pressure on the suction side p 2 equals pressure on the pressure side K is the parameterization constant for flow ⁇ p 1 equal to differential pressure via differential pressure sensor on the suction side
- R and k as well as z are of the Gas composition dependent.
- R is the gas constant
- k is the Isentropic exponent
- z the compressibility number.
- the composition is that of the compressor compressed gas known. In most cases only compresses a gas, e.g. Air, nitrogen or a process gas with time-constant composition in one chemical process.
- the sizes R, k and z are over the whole Operating time of the compressor constant and can therefore be considered Constants in the formulas for calculating the enthalpy difference and volume flow are taken into account. The sizes The enthalpy difference and volume flow are in this case physically correctly recorded.
- compressors are used variable gas composition operated, the composition in the Individual case is not known.
- the surge limit which increases within the surge limit control is considered.
- R, k and z is the consideration of a different course of the surge limit however usually not possible.
- the present procedure is therefore with the compressors to be used for which the course of the surge limit or the Surge limit control line in the map a dependency of at least a gas composition.
- Fig. 1 shows the characteristic of a compressor with constant Speed and fixed geometry.
- Map delta h over V is designed such that this has general validity for all extracted gases.
- the surge limit depends on the gas composition.
- one other characteristic is effective is the compressor thermodynamic for all occurring gas compositions or at least for some representative gas compositions interpreted.
- the characteristic curves are then through in the test field verify corresponding measurements with different gases.
- FIG. 3 shows the course of the respective compressor characteristics for different gas compositions according to FIG. 1, as the course from a surge limit controller without knowing the actual Gas composition is detected. For every gas mixture it results another characteristic curve with a different surge limit point. From the Pump surge point in Fig. 1 are different surge point, that can be connected by a line. From the Pump limit point in Fig. 1 thus becomes a "fictitious" Surge limit line.
- the fictitious can be found within the surge limit control Simulate the surge line and the protection system of the compressor (Surge limit control), a control line according to the "fictitious" Pump limit line can be specified.
- This will be normal characteristics the surge limit control used.
- Each surge limit control is e.g. designed a variable speed compressor or variable geometry. Any such compressor will by a map with different speed characteristics or different geometries (guide vane position or Throttle position). Each of the characteristics of one such "normal" compressor ends in a surge limit. The connection of such surge limit points results in Surge limit line.
- the surge limit controller therefore does not need any additional features in order to also the case of any variable gas composition with fixed Cover geometry and fixed speed.
- the process works according to the method that the Control error that occurs in the surge limit controller of a compressor due to the unknown gas composition results in the determination of the "fictitious" surge limit is predetermined.
- the surge limit controller will errors that inevitably result in advance by the provided computer, in which the occurring Error has been taken into account in advance.
- the compressor can by taking into account the errors that occur safe when operating a compressor with different gases and be protected precisely, even if the gas composition of the actually extracted gas is not known at all.
- the method can also be applied to a compressor, whose characteristic curve is dependent on the 2 has gas composition.
- a compressor whose characteristic curve is dependent on the 2 has gas composition.
- the Sizes delta h and V for the surge limit controller are intended as examples the data for the gas composition are used with which the compressor is operated frequently.
- the corresponding Data are those according to the upper characteristic curve in FIG. 2.
- FIG. 4 corresponds the representation in Fig. 3. In both cases there is a "Fictitious" surge line, which has universal validity, too if the composition of the gas currently being extracted is not is known.
- the "fictitious" surge line according to FIGS. 3 and 4 can be used derive a universal control line that the compressor too without knowledge of the gas composition in the entire area of application optimally protects.
- surge limit control is the compressor always operate as close as possible to the surge line. To becomes a control difference from the minimum permissible flow and current flow and the surge limit controller switched.
- the fictitious surge limit control line is given by the Formation of a system deviation such a course that the arithmetic errors occurring due to the unknown quantities R, k and z of a gas composition when determining delta h and current volume flow V cancel each other out.
- the compressor is always adequately protected against operation in the unstable map area, even if the gas composition fluctuates significantly is subject.
- turbo compressors in particular multi-stage machines, in particular the course of the Pump limit line in the map depends on the Gas composition.
- variable geometry or variable speed and variable Gas composition can apply to any gas composition different course of the surge line or the surge line result. From the surge line or the surge line becomes a bevy of surge line and surge line control lines.
- Each characteristic of the original map (Fig. 5) is after the previously described procedure for the different Predetermined gas compositions. From the surge limit of Characteristic curve results in a surge line that is only valid for this speed or this throttle valve position or Has guide vane position. An application of this procedure on all characteristics of the original map leads to a family of Surge limit lines. Each of these lines applies to a speed or Guide vane position or throttle valve position. Because speed and position of the throttle valve or guide vane by measurement The surge limit controller can always be easily detected for the respective speed and throttle valve position or Guide vane position valid pump limit line can be specified. Between the characteristic curves can be done via the central computer unit be interpolated so that the default is limited Number of characteristic curves must take place.
- One advantage of the simplified approach is that it is a classic one Pump limit control without any modification to protect such Compressors can be used. To do this are preferred the required surge limit points for the different Compressor geometries or speeds and the possible Gas compositions in a common map consider. This results in a surge limit band.
- the Course of the surge limit line decisive for the surge limit control results from a connection of the farthest right, i.e. with the largest volume flows Surge points. This ensures that independent on the gas composition that is driven but is unknown a sufficient safety distance from the current surge limit consists.
- FIG. 6 shows the two characteristic diagrams of a surge limit control percentage nominal speed for two gases.
- the fictitious surge line or the universal surge line By changing the gas composition the fictitious surge line or the universal surge line to a map of fictitious surge limit lines or more universal Rule lines.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
R gleich Gaskonstante
k gleich Isentropenexponent
z gleich Kompressibilitätszahl
T1 gleich Temperatur Saugseite
p1 gleich Druck auf Saugseite
p2 gleich Druck auf Druckseite
K gleich Parametrierkonstante für Durchfluß
Δp1 gleich Differenzdruck über Wirkdrucksensor auf Saugseite
- Fig. 1
- die Kennlinie eines Kompressors mit konstanter Drehzahl und feststehender Geometrie;
- Fig. 2
- Kennlinien eines Kompressors für zwei Gase;
- Fig. 3
- Kennlinien eines Kompressors für fünf verschiedene Gase;
- Fig. 4
- Kennlinien eines Kompressors für ähnlich verschiedene Gase wie in Fig. 3;
- Fig. 5
- Kennlinien eines Kompressors für verschiedene Winkel der verstellbaren Leitschaufeln;
- Fig. 6
- Kennlinien eines Kompressors bei prozentualer Nenndrehzahl für zwei Gase und
- Fig. 7
- Regelkennlinien eines Kompressors mit Pumpgrenzen zweier Gase und eine gewählte Regellinie.
Claims (4)
- Verfahren zum sicheren Betreiben von Turbokompressoren mit einer Pumpgrenzregelung und einem Pumpgrenzregelventil, wobei der Kompressor Gase mit unterschiedlicher Zusammensetzung fördert und die Zusammensetzung des Gases (Molekulargewicht) das Kennfeld des Turbokompressors und damit die Lage der Pumpgrenze im Kennfeld beeinflußt, dadurch gekennzeichnet, dass die verschiedenen Zusammensetzungen der Gase mit dem Einfluss auf die Lage der Pumpgrenze und damit auch auf die Lage der Pumpgrenzregellinie kompensiert werden, indem innerhalb der Pumpgrenzregelung für die Erfassung von Förderhöhe Δ h und Volumenstrom V vorbestimmte Auslegungswerte für Gaskonstante R, Isentropenexponent k und Kompressibilitätszahl z verwendet werden und in Form einer vorbestimmten Pumpgrenzlinie (Fig. 2, Fig. 4) innerhalb der Pumpgrenzregelung abgebildet werden, wobei Sollwert und Istwert für die Pumpgrenzregelung aus der Abbildung ermittelt werden und der Kompressor mit den ermittelten Soll- und Istwerten für die Pumpgrenzregelung mit einem minimal erforderlichen Abstand zur Pumpgrenze betrieben wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass eine Anzahl von Kennlinien mit konstanter Drehzahl oder mit konstanter Geometrie (Leitschaufelstellung oder Stellung einer Drosselarmatur) abgebildet wird, wobei eine Kurvenschar jeweils mit Pumpgrenzregellinien für eine konstante Drehzahl oder konstante Kompressorgeometrie beschrieben wird, dass zwischen den verschiedenen Kurven interpoliert und die Pumpgrenzregellinie bei jeder Drehzahl oder Kompressorgeometrie korrekt ermittelt wird und der Pumpgrenzregler mit dem minimal erforderlichen Abstand zur Pumpgrenze betrieben wird.
- Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass anstelle der Interpolation zwischen verschiedenen Pumpgrenzregellinien eine einzige "fiktive" Regellinie abgebildet wird, deren Lage vom Kennfeld abhängig ist und von den am weitesten rechts liegenden Pumppunkten bestimmt wird.
- Verfahren zum sicheren Betreiben von Turbokompressoren mit einer Pumpgrenzregelung und einem Pumpgrenzregelventil, wobei der Kompressor Gase mit unterschiedlicher Zusammensetzung fördert und die Zusammensetzung der einzelnen Gase (Molekulargewicht) das Kennfeld des Turbokompressors und damit die Lage der Pumpgrenze im Kennfeld unbeeinflußt läßt, dadurch gekennzeichnet, dass innerhalb der Pumpgrenzregelung für die Erfassung von Förderhöhe Δ h und Volumenstrom V ein vorbestimmter Auslegungswert für Gaskonstante R, Isentropenexponent k und Kompressibilitätszahl z verwendet wird und in Form einer vorbestimmten Pumpgrenzlinie (Fig. 1) innerhalb der Pumpgrenzregelung abgebildet wird, wobei Sollwert und Istwert für die Pumpgrenzregelung aus der Abbildung ermittelt werden und der Kompressor mit den ermittelten Soll- und Istwerten für die Pumpgrenzregelung mit einem minimal erforderlichen Abstand zur Pumpgrenze betrieben wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10304063A DE10304063A1 (de) | 2003-01-31 | 2003-01-31 | Verfahren zum sicheren Betreiben von Turbokompressoren mit einer Pumpgrenzregelung und einem Pumpgrenzregelventil |
DE10304063 | 2003-01-31 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1450046A2 true EP1450046A2 (de) | 2004-08-25 |
EP1450046A3 EP1450046A3 (de) | 2005-10-26 |
EP1450046B1 EP1450046B1 (de) | 2008-02-27 |
Family
ID=32695125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04000580A Expired - Lifetime EP1450046B1 (de) | 2003-01-31 | 2004-01-14 | Verfahren zum Betreiben von Turbokompressoren mit Pumpgrenzregelung |
Country Status (4)
Country | Link |
---|---|
US (1) | US7025558B2 (de) |
EP (1) | EP1450046B1 (de) |
AT (1) | ATE387584T1 (de) |
DE (2) | DE10304063A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009092409A1 (de) * | 2008-01-21 | 2009-07-30 | Man Turbo Ag | Verfahren zur regelung einer strömungsmaschine |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008058799B4 (de) * | 2008-11-24 | 2012-04-26 | Siemens Aktiengesellschaft | Verfahren zum Betrieb eines mehrstufigen Verdichters |
DE102009003978A1 (de) | 2009-01-07 | 2010-07-08 | Man Turbo Ag | Verfahren zur Bestimmung einer Eigenschaft eines Gases mittels einer Strömungsmaschine |
EP2322877A3 (de) * | 2009-10-20 | 2015-05-27 | Johnson Controls Technology Company | Steuergeräte und Verfahren zur Bereitstellung von der computergestützten Erzeugung und Verwendung einer dreidimensionalen Überspannungskarte zur Steuerung von Kühlgeräten |
DE102011008165A1 (de) * | 2011-01-10 | 2012-07-12 | Wilo Se | Verfahen zum leistungsoptimierten Betreiben einer elektromotorisch angetriebenen Pumpe bei geringen Volumenströmen |
WO2012132062A1 (ja) * | 2011-03-31 | 2012-10-04 | 三菱重工業株式会社 | ガス圧縮機の運転方法及びガス圧縮機を備えるガスタービン |
US9074606B1 (en) | 2012-03-02 | 2015-07-07 | Rmoore Controls L.L.C. | Compressor surge control |
KR101858643B1 (ko) * | 2012-03-23 | 2018-05-16 | 한화테크윈 주식회사 | 서지 방지를 위한 압축기 시스템 제어방법 및 압축기 시스템 |
US9097447B2 (en) | 2012-07-25 | 2015-08-04 | Johnson Controls Technology Company | Methods and controllers for providing a surge map for the monitoring and control of chillers |
ITCO20120056A1 (it) * | 2012-11-07 | 2014-05-08 | Nuovo Pignone Srl | Metodo per operare un compressore in caso di malfunzionamento di uno o piu' segnali di misura |
US12044245B2 (en) * | 2021-04-29 | 2024-07-23 | Copeland Lp | Mass flow interpolation systems and methods for dynamic compressors |
CN114870422B (zh) * | 2022-05-12 | 2024-03-01 | 梅胜 | 一种基于气压机组的分馏塔顶压力控制方法和装置 |
CN116357607B (zh) * | 2023-06-02 | 2023-08-22 | 杭州德玛仕气体设备工程有限公司 | 透平压缩机一键起动加载方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US5195875A (en) * | 1991-12-05 | 1993-03-23 | Dresser-Rand Company | Antisurge control system for compressors |
US5908462A (en) * | 1996-12-06 | 1999-06-01 | Compressor Controls Corporation | Method and apparatus for antisurge control of turbocompressors having surge limit lines with small slopes |
US20020062679A1 (en) * | 2000-06-20 | 2002-05-30 | Petr Petrosov | Method and apparatus of molecular weight determination for gases flowing through the compressor |
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CH599460A5 (de) * | 1975-12-23 | 1978-05-31 | Bbc Brown Boveri & Cie | |
DE3540087A1 (de) * | 1985-11-12 | 1987-05-14 | Gutehoffnungshuette Man | Verfahren zum regeln von turbokompressoren |
DE3544822A1 (de) * | 1985-12-18 | 1987-06-19 | Gutehoffnungshuette Man | Verfahren zur pumpgrenzregelung von turbokomporessoren |
US4825380A (en) * | 1987-05-19 | 1989-04-25 | Phillips Petroleum Company | Molecular weight determination for constraint control of a compressor |
DE3809881A1 (de) * | 1988-03-24 | 1989-10-12 | Gutehoffnungshuette Man | Regelverfahren zur vermeidung des pumpens eines turbokompressors |
US4949276A (en) | 1988-10-26 | 1990-08-14 | Compressor Controls Corp. | Method and apparatus for preventing surge in a dynamic compressor |
IT1255836B (it) | 1991-10-01 | 1995-11-17 | Procedimento per la sorveglianza del limite di pompaggio di turbocompressori a piu' stadi e refrigerazione intermedia | |
DE4202226C2 (de) * | 1991-10-01 | 1995-06-08 | Atlas Copco Energas | Verfahren zur Überwachung eines mehrstufigen, zwischengekühlten Turboverdichters |
DE4316202C2 (de) * | 1993-05-14 | 1998-04-09 | Atlas Copco Energas | Verfahren zur Überwachung der Pumpgrenze eines Turboverdichters mit Vorleitapparat und Nachleitapparat |
JPH0712090A (ja) * | 1993-06-28 | 1995-01-17 | Mitsubishi Heavy Ind Ltd | 圧縮機のサージング発生防止方法 |
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DE19812159A1 (de) * | 1998-03-20 | 1999-09-23 | Ruhrgas Ag | Verfahren zum Regeln des Volumenstroms von Gas, insbesondere Erdgas, durch einen Turboverdichter |
DE19828368C2 (de) | 1998-06-26 | 2001-10-18 | Man Turbomasch Ag Ghh Borsig | Verfahren und Vorrichtung zum Betreiben von zwei- oder mehrstufigen Verdichtern |
DE10012380A1 (de) | 2000-03-14 | 2001-09-20 | Man Turbomasch Ag Ghh Borsig | Verfahren zum Schutz eines Turbokompressors vor Betrieb im instabilen Arbeitsbereich |
DE10046322A1 (de) * | 2000-09-19 | 2002-04-11 | Siemens Ag | Verfahren zum Ermitteln einer Kenngröße |
-
2003
- 2003-01-31 DE DE10304063A patent/DE10304063A1/de not_active Withdrawn
-
2004
- 2004-01-14 AT AT04000580T patent/ATE387584T1/de not_active IP Right Cessation
- 2004-01-14 EP EP04000580A patent/EP1450046B1/de not_active Expired - Lifetime
- 2004-01-14 DE DE502004006288T patent/DE502004006288D1/de not_active Expired - Lifetime
- 2004-01-22 US US10/763,103 patent/US7025558B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US5195875A (en) * | 1991-12-05 | 1993-03-23 | Dresser-Rand Company | Antisurge control system for compressors |
US5908462A (en) * | 1996-12-06 | 1999-06-01 | Compressor Controls Corporation | Method and apparatus for antisurge control of turbocompressors having surge limit lines with small slopes |
US20020062679A1 (en) * | 2000-06-20 | 2002-05-30 | Petr Petrosov | Method and apparatus of molecular weight determination for gases flowing through the compressor |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009092409A1 (de) * | 2008-01-21 | 2009-07-30 | Man Turbo Ag | Verfahren zur regelung einer strömungsmaschine |
Also Published As
Publication number | Publication date |
---|---|
ATE387584T1 (de) | 2008-03-15 |
EP1450046A3 (de) | 2005-10-26 |
US20040151576A1 (en) | 2004-08-05 |
DE502004006288D1 (de) | 2008-04-10 |
US7025558B2 (en) | 2006-04-11 |
EP1450046B1 (de) | 2008-02-27 |
DE10304063A1 (de) | 2004-08-12 |
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