WO2010003890A2 - Verfahren und vorrichtung zur regelung oder überwachung von feuerungsanlagen sowie zur überwachung von gebäuden mit gasbrennern - Google Patents
Verfahren und vorrichtung zur regelung oder überwachung von feuerungsanlagen sowie zur überwachung von gebäuden mit gasbrennern Download PDFInfo
- Publication number
- WO2010003890A2 WO2010003890A2 PCT/EP2009/058384 EP2009058384W WO2010003890A2 WO 2010003890 A2 WO2010003890 A2 WO 2010003890A2 EP 2009058384 W EP2009058384 W EP 2009058384W WO 2010003890 A2 WO2010003890 A2 WO 2010003890A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gas
- carbon monoxide
- light source
- absorption
- methane
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 238000010304 firing Methods 0.000 title claims abstract 4
- 239000007789 gas Substances 0.000 claims abstract description 86
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 66
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 48
- 238000010521 absorption reaction Methods 0.000 claims abstract description 21
- 238000000862 absorption spectrum Methods 0.000 claims abstract description 11
- 238000011156 evaluation Methods 0.000 claims abstract description 5
- 238000004611 spectroscopical analysis Methods 0.000 claims abstract description 5
- 230000003595 spectral effect Effects 0.000 claims abstract 2
- 238000002485 combustion reaction Methods 0.000 claims description 21
- 238000005259 measurement Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000004065 semiconductor Substances 0.000 claims description 4
- 239000002737 fuel gas Substances 0.000 claims description 2
- 230000002123 temporal effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000003570 air Substances 0.000 description 3
- 238000001307 laser spectroscopy Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- VNWKTOKETHGBQD-YPZZEJLDSA-N carbane Chemical compound [10CH4] VNWKTOKETHGBQD-YPZZEJLDSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000001285 laser absorption spectroscopy Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
- G01J3/433—Modulation spectrometry; Derivative spectrometry
- G01J3/4338—Frequency modulated spectrometry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M2900/00—Special features of, or arrangements for combustion chambers
- F23M2900/11041—Means for observing or monitoring flames using photoelectric devices, e.g. phototransistors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2231/00—Fail safe
- F23N2231/18—Detecting fluid leaks
Definitions
- the invention relates to the simultaneous detection of the concentration of carbon monoxide and methane by laser absorption spectroscopy. Furthermore, an apparatus for carrying out the method is presented. Method and apparatus are used for control and / or monitoring of combustion plants or buildings in which gas burners are used.
- VCSEL Vertical Cavity Surface Emitting Laser
- metal oxide semiconductor gas sensors which can simultaneously detect at least two gases in a sample gas volume.
- these sensors require that a gas-sensitive layer is brought to different temperature levels Liehe so that the gas-sensitive layer having the optical ⁇ male temperature for the specific detection of a gas. This is associated with temperature change processes or with heating and cooling processes.
- reaction times in a heating gas control or safety system are desired.
- reaction times of the sensors for measuring at least two gas components can not be represented by metal oxide semiconductor sensors.
- the invention is therefore based on the object to provide a method and an apparatus for the simultaneous detection of the concentration of carbon monoxide and methane.
- the invention is based on the use of spectroscopy with monochromatic wavelength tunable light sources.
- laser diodes are used in particular.
- the invention is based on the simultaneous detection of the carbon monoxide and methane concentration in the spectroscopy with a monochromatic tunable in wavelength light source, in particular laser spectroscopy, wherein the measuring gas is acted upon in an absorption path and by means of a photodetector an absorption spectrum of the in a Ab-. Suction path located measuring gas is recorded where ⁇ at least the absorption bands of carbon monoxide and methane are present.
- a monochromatic tunable in wavelength light source in particular laser spectroscopy
- a Laserdio ⁇ de For rapid detection of the concentrations of both carbon monoxide and methane, it is advantageous to use a Laserdio ⁇ de, in particular to use a VCSEL.
- the selection of the frequency of the laser diode is such that in a monochrome tuning the absorption bands of both carbon monoxide and methane are swept over. Recorded absorption spectra are evaluated not only on the Exis ⁇ tence of these gases, but the concentrations of the gases will be determined. This can be done by evaluating the corresponding amplitudes for respective bands.
- the reference cell advantageously contains at least one target gas, so that a reference measurement can be made for this.
- monitoring of the carbon monoxide concentration can serve, for example. Accordingly, it is possible to monitor and regulate an optimal combustion state by readjustment in the event of deviations from a desired value.
- the method can be advantageously used in buildings that are heated with gas burners. Can be monitored ne ⁇ ben carbon monoxide concentration and the Me thankonzentra- tion wherein the fuel used has proportions of methane.
- Figure 1 shows a measured derivative spectrum in the range of 2.363-2.368 microns with the absorption lines of
- FIG. 2 shows the installation location of a CO / CH 4 sensor in the exhaust gas of a gas burner
- FIG. 3 shows the installation location in a living space which is in connection with the operating room of a gas heater / gas boiler.
- a monitoring function registers both the carbon monoxide and the methane concentration in an exhaust gas and runs in such a way that the carbon monoxide concentration rises above the ignition limit as the oxygen deficiency increases during combustion. With further increased lack of oxygen and unburned hydrocarbons such as methane get into the exhaust gas. The carbon monoxide concentration may drop again. In other words, a dangerous operating condition can not be unequivocally detected by monitoring the carbon monoxide concentration alone. Only the simultaneous measurement of carbon monoxide and methane enables reliable detection of the respective operating state. If, for example, a combustible gas mixture is present in the exhaust gas tract, this dangerous operating state can be detected directly. For example, a gas water heater in a home in ⁇ stalled, so in particular, two potential hazards occur:
- a The leakage of the supplied fuel gas, for example natural gas.
- b The emission of carbon monoxide from the combustion into the room air.
- Light source such as a VCSEL
- an absorption path and a photodetector needed.
- the gas to be examined is located in the absorption measuring section.
- the monochrome and spectrally tunable light source the absorption spectrum of the gas mixture present in the measuring section was recorded with the photodetector.
- the target gases are carbon monoxide CO and methane CH4.
- the proposed wavelength of the light source can be, for example, 2.35 ⁇ m.
- the laser diode remains monochrome, but can be tuned in the fine range such that let absorb an absorption spectrum of a sample gas. In principle, any wavelength range in which carbon monoxide and methane absorb can be used.
- the evaluation of the absorption spectrum is based on the concentrations of the individual gases in the mixture. This is done, for example, by comparing the measured spectrum with a calculated spectrum of the gas mixture.
- a measurement gas line or a reference gas cell is mounted. This is a pre-absorption with a gas.
- the reference gas cell can be directly in the gas stream or in a separate Be arranged light path. In the latter case, it would contain part of the radiation of the light from the main stream.
- a separate reference gas cell can be omitted if the housing of the photodetector and / or the housing of the light source are filled with the reference gas and light beams are ⁇ hm practicgebowt accordingly.
- the reference gas consists either of at least one of the target gases or at least one further gas absorbing in the measurement spectrum.
- a target gas can be determined, wherein an atom of the gas is replaced by an isotope. Gas mixtures of more than two components are possible.
- the concentration measurement of carbon monoxide is used to maximize combustion efficiency and avoid unwanted emissions of, for example, carbon monoxide and nitrogen oxide, as well as unburned hydrocarbons.
- control of the volume flow of air is supplied to the combustion and readjusted depending on the measured CO concentration.
- Dangerous operating conditions are associated, for example, with an explosion hazard. These operating states can be detected by exceeding defined limit values such as, for example, the MAK values / maximum workplace concentration.
- Hazardous operating conditions can be detected, for example:
- a carbon monoxide concentration exceeding a specified limit, at a methane concentration exceeding a specified limit, or at a charac- terized time evolution of carbon monoxide and methane concentrations can be used to assess the condition of a furnace in addition.
- the combustion exhaust gas contains several percent by volume of water vapor. In the case of incomplete combustion, the moisture concentration drops to about 1% by volume when the flame goes out, to the value of the ambient air.
- FIG. 1 shows an absorption spectrum which can be covered with a tunable VCSEL in the range from 2.363 to 2.368 ⁇ m, wherein the bands of carbon monoxide / 10 ppm, methane / 85 ppm and water / 1200 ppm are swept over. The numerical values simultaneously indicate the measured concentration.
- FIG. 2 shows the installation location of a CO / CH 4 sensor in the exhaust gas of a gas or oil burner, which can be regulated via the CO content.
- the methane content can be determined simultaneously to capture more critical Be ⁇ drove into being for security reasons.
- the in - is associated with the operation space of a gas heater / gas heater, may be additionally wherein a smoke detector is installed or tegriert in ⁇ .
- the target gases including water vapor, are lighter than air, so attaching them to the ceiling makes sense.
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Optics & Photonics (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09780118A EP2304320A2 (de) | 2008-07-09 | 2009-07-03 | Verfahren und vorrichtung zur regelung oder überwachung von feuerungsanlagen sowie zur überwachung von gebäuden mit gasbrennern |
CN200980124297XA CN102077028A (zh) | 2008-07-09 | 2009-07-03 | 用于调节或监测燃烧设备以及监测具有燃气燃烧器的建筑的方法和装置 |
US13/003,443 US20120031167A1 (en) | 2008-07-09 | 2009-07-03 | Method and device for controlling or monitoring firing systems and for monitoring buildings having gas burners |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008032223.7 | 2008-07-09 | ||
DE102008032223 | 2008-07-09 | ||
DE102009009314A DE102009009314A1 (de) | 2008-07-09 | 2009-02-17 | Verfahren und Vorrichtung zur Regelung oder Überwachung von Feuerungsanlagen sowie zur Überwachung von Gebäuden mit Gasbrennern |
DE102009009314.1 | 2009-02-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2010003890A2 true WO2010003890A2 (de) | 2010-01-14 |
WO2010003890A3 WO2010003890A3 (de) | 2010-03-18 |
Family
ID=41427397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/058384 WO2010003890A2 (de) | 2008-07-09 | 2009-07-03 | Verfahren und vorrichtung zur regelung oder überwachung von feuerungsanlagen sowie zur überwachung von gebäuden mit gasbrennern |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120031167A1 (de) |
EP (1) | EP2304320A2 (de) |
CN (1) | CN102077028A (de) |
DE (1) | DE102009009314A1 (de) |
WO (1) | WO2010003890A2 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012069850A1 (en) * | 2010-11-25 | 2012-05-31 | Oxford Catalysts Limited | Steam production |
DE102013207720B4 (de) | 2013-04-26 | 2019-10-17 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zur Überwachung von Verbrennungsanlagen |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101994509B1 (ko) * | 2012-04-19 | 2019-06-28 | 존 징크 컴파니 엘엘씨 | 이동식 가변형 다이오드 레이저 흡수 분광기를 구비한 노 내 역-반사기 |
CN108829021A (zh) * | 2018-06-09 | 2018-11-16 | 深圳市中电数通智慧安全科技股份有限公司 | 一种工业园废气处理物联监控系统 |
US12017506B2 (en) | 2020-08-20 | 2024-06-25 | Denso International America, Inc. | Passenger cabin air control systems and methods |
US11828210B2 (en) | 2020-08-20 | 2023-11-28 | Denso International America, Inc. | Diagnostic systems and methods of vehicles using olfaction |
US11636870B2 (en) | 2020-08-20 | 2023-04-25 | Denso International America, Inc. | Smoking cessation systems and methods |
US11881093B2 (en) | 2020-08-20 | 2024-01-23 | Denso International America, Inc. | Systems and methods for identifying smoking in vehicles |
US11760169B2 (en) | 2020-08-20 | 2023-09-19 | Denso International America, Inc. | Particulate control systems and methods for olfaction sensors |
US11760170B2 (en) | 2020-08-20 | 2023-09-19 | Denso International America, Inc. | Olfaction sensor preservation systems and methods |
US11813926B2 (en) | 2020-08-20 | 2023-11-14 | Denso International America, Inc. | Binding agent and olfaction sensor |
US11932080B2 (en) | 2020-08-20 | 2024-03-19 | Denso International America, Inc. | Diagnostic and recirculation control systems and methods |
DE102021103729A1 (de) | 2021-02-17 | 2022-08-18 | Vaillant Gmbh | Verfahren und Anordnung zur Beobachtung eines Verbrennungsprozesses in einem Heizgerät |
CN114184559B (zh) * | 2021-10-22 | 2023-08-25 | 安徽大学 | 基于激光开放光路的早期室内火场预判检测装置 |
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US7012696B2 (en) * | 2000-07-12 | 2006-03-14 | Macquarie Research Ltd. | Optical heterodyne detection in optical cavity ringdown spectroscopy |
EP1816464A1 (de) * | 2006-02-01 | 2007-08-08 | Siemens Aktiengesellschaft | Anordnung zur Konzentrationsessung für Abgaskomponenten im Abgasbereich einer Feuerungsanlage |
DE102006036563A1 (de) * | 2006-08-04 | 2008-02-07 | Siemens Building Technologies Hvac Products Gmbh | Überwachung von Verbrennungsvorgängen an einem Ort durch schnellen Sauerstoffsensor |
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US4059356A (en) * | 1975-02-24 | 1977-11-22 | Environmental Research & Technology, Inc. | Gas detector |
US4083367A (en) * | 1976-07-28 | 1978-04-11 | Andros Incorporated | Method and apparatus for pulmonary function analysis |
US4990780A (en) * | 1989-06-19 | 1991-02-05 | General Motors Corporation | Method for determining fuel and engine oil comsumption using tunable diode laser spectroscopy |
US5252060A (en) * | 1992-03-27 | 1993-10-12 | Mckinnon J Thomas | Infrared laser fault detection method for hazardous waste incineration |
DE19717145C2 (de) * | 1997-04-23 | 1999-06-02 | Siemens Ag | Verfahren zur selektiven Detektion von Gasen und Gassensor zu dessen Durchführung |
DE19808175C1 (de) * | 1998-02-26 | 1999-10-07 | Siemens Ag | Sensor und Verfahren zur selektiven, separaten Detektion von CO und/oder CH¶4¶ mit einen solchen neuen Sensor |
US6121627A (en) * | 1998-08-31 | 2000-09-19 | Tulip; John | Gas detector with reference cell |
FR2785050B1 (fr) * | 1998-10-23 | 2001-01-19 | Aerospatiale | Systeme de detection et de mesure d'un ou de plusieurs gaz d'un melange gazeux |
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-
2009
- 2009-02-17 DE DE102009009314A patent/DE102009009314A1/de not_active Withdrawn
- 2009-07-03 EP EP09780118A patent/EP2304320A2/de not_active Withdrawn
- 2009-07-03 WO PCT/EP2009/058384 patent/WO2010003890A2/de active Application Filing
- 2009-07-03 CN CN200980124297XA patent/CN102077028A/zh active Pending
- 2009-07-03 US US13/003,443 patent/US20120031167A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7012696B2 (en) * | 2000-07-12 | 2006-03-14 | Macquarie Research Ltd. | Optical heterodyne detection in optical cavity ringdown spectroscopy |
EP1816464A1 (de) * | 2006-02-01 | 2007-08-08 | Siemens Aktiengesellschaft | Anordnung zur Konzentrationsessung für Abgaskomponenten im Abgasbereich einer Feuerungsanlage |
DE102006036563A1 (de) * | 2006-08-04 | 2008-02-07 | Siemens Building Technologies Hvac Products Gmbh | Überwachung von Verbrennungsvorgängen an einem Ort durch schnellen Sauerstoffsensor |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012069850A1 (en) * | 2010-11-25 | 2012-05-31 | Oxford Catalysts Limited | Steam production |
DE102013207720B4 (de) | 2013-04-26 | 2019-10-17 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zur Überwachung von Verbrennungsanlagen |
Also Published As
Publication number | Publication date |
---|---|
US20120031167A1 (en) | 2012-02-09 |
EP2304320A2 (de) | 2011-04-06 |
CN102077028A (zh) | 2011-05-25 |
WO2010003890A3 (de) | 2010-03-18 |
DE102009009314A1 (de) | 2010-01-21 |
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