EP4127855A1 - Dosing unit for generating a mixed gas - Google Patents
Dosing unit for generating a mixed gasInfo
- Publication number
- EP4127855A1 EP4127855A1 EP21719025.5A EP21719025A EP4127855A1 EP 4127855 A1 EP4127855 A1 EP 4127855A1 EP 21719025 A EP21719025 A EP 21719025A EP 4127855 A1 EP4127855 A1 EP 4127855A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- line
- mixed gas
- main
- mixed
- 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.)
- Pending
Links
- 238000005259 measurement Methods 0.000 claims abstract description 19
- 238000009423 ventilation Methods 0.000 claims abstract description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 abstract description 14
- 239000007789 gas Substances 0.000 description 212
- 239000000446 fuel Substances 0.000 description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 150000002835 noble gases Chemical class 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/38—Borides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/12—Arrangements for supervising or controlling working operations for injecting a composition into the line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/065—Arrangements for producing propulsion of gases or vapours
- F17D1/075—Arrangements for producing propulsion of gases or vapours by mere expansion from an initial pressure level, e.g. by arrangement of a flow-control valve
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
- G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
- G05D11/131—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components
- G05D11/132—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by measuring the values related to the quantity of the individual components by controlling the flow of the individual components
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
-
- 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 metering unit for generating a mixed gas with a main gas source, a main gas secondary line via which the main gas can be conveyed from the main gas source and in which a first mass flow regulator is arranged, an additional gas source, an additional gas line via which additional gas can be conveyed, and in which a second Mass flow regulator is arranged, a storage container which is connected to the main gas secondary line and the additional gas line and in which a mixed gas from the main gas and the additional gas is stored, a vent line via which the mixed gas can be discharged from the storage container, a check valve or pressure relief valve with a defined Opening pressure which is arranged in the vent line and a mixed gas line via which the mixed gas can be conveyed from the storage container and in which a third mass flow regulator is arranged.
- Such metering units are used, for example, to generate a mixed gas flow for testing fuel cells, in which one or more harmful gases are mixed with the hydrogen in order to then determine what effects the harmful gases have on the fuel cell stack.
- This can also be used on the cathode side to simulate the effects of different gas compositions in the oxygen-containing air flow. For this purpose, a precisely metered, defined mass flow of the mixed gas is fed to the fuel cell stack.
- Such a mixing unit is for example in CN 209406081 U for the production of a mixture of hydrogen and monophosphane described.
- the monophosphane and the hydrogen are guided to a storage container in a controlled manner via a membrane valve, a check valve and a mass flow sensor and stored there.
- a vent line in which a pressure relief valve is arranged, leads to the outside from the reservoir.
- a line branches off from the storage container, in which a gas analyzer is arranged.
- the object is therefore to always be able to mix the desired concentrations very precisely down to the ppm, ppb or ppt range, regardless of the proportion of the additional gas to be added. Furthermore, it should be possible to carry out measurements continuously and to be able to continuously generate correspondingly accurate mixtures. A change in the mixing ratio during the measurement is also desirable.
- a metering unit for generating a mixed gas with the features of main claim 1.
- the metering unit has a main gas source and at least one additional gas source, via which the gas to be admixed is supplied.
- the main gas can be conveyed into a main gas line and a main gas secondary line in which a first mass flow regulator is arranged.
- the additional gas can be conveyed into an additional gas line in which a second mass flow regulator is arranged.
- the main gas branch line and the additional gas line either open individually into a storage container or are brought together in front of the storage container so that the mixed gas flows into the storage container, which is connected either directly or indirectly to the main gas branch line and the additional gas line and in which the mixed gas is made up of the main gas and the additional gas is stored.
- the storage container is also fluidically connected to a ventilation line, via which the mixed gas can be discharged from the storage container, and in which a check valve or pressure relief valve with a defined opening pressure is arranged.
- a mixed gas line via which the mixed gas can be conveyed from the storage container and in which a third mass flow regulator is arranged, leads from the storage container into a mixing zone.
- the main gas line also opens into this mixing zone, so that at least the main gas from the main gas line and the mixed gas from the mixed gas line flow into the mixing zone and form at least part of a measurement gas which flows via an outlet line to a consumer, which is designed as a fuel cell, for example .
- the metering unit has a two-stage structure, in which a first mixing ratio is established in a first stage and an additional dilution takes place in the second stage by adding the main gas. With these two stages, very precise mixing ratios can be achieved up to the ppt concentration range of the additional gas in the main gas. In this way, pure gases can also be used as additional gases, which are accordingly not diluted with nitrogen, since the low concentrations can be achieved on the dosing unit itself.
- the pressure in the storage tank can always be kept constant by constantly discharging some mixed gas via the vent line.
- a constant mass flow of the mixed gas is maintained and, on the one hand, a constant mixing ratio can be maintained in the mixing zone and, on the other hand, desired mixing ratios can be set and changed continuously during operation.
- the non-return valve and the resulting continuous flow prevent the gases from segregating.
- hydrogen and nitrogen or oxygen can be used as the main gas, to which carbon dioxide, carbon monoxide, noble gases or the like is added as an additional gas.
- the mixing zone is preferably formed upstream of or in a buffer container in which the measurement gas is stored, whereby the desired mixed gas flows with the defined concentrations can still be continuously supplied to the outlet line even in the event of sudden changes in consumption.
- the buffer tank cushions changes in consumption and must be designed so large that incorrect dosages occurring during a flow change due to the subsequent regulation remain negligible.
- the buffer container is connected to a recirculation line, via which the measuring gas can be fed out of the buffer container and back in again and in which a gas analyzer for the additional gas is arranged, whereby the mixing accuracy can be additionally increased, since the proportion of Additional gas in the finished mixed gas can be determined and readjusted accordingly.
- the flow prevents the gases from segregating in the buffer tank.
- an outlet pressure regulator is arranged in the outlet line, so that the fuel cell is supplied with a mixed gas flow at a constant pressure and undesired pressure fluctuations or mass flow fluctuations resulting therefrom are avoided.
- a check valve is arranged in the main gas line between the main gas source and the buffer container, so that a backflow of the mixed gas to the main gas source is prevented.
- pure main gas is fed to the buffer tank and a necessary pressure difference is made available for the mass flow controller.
- the metering unit has several main gas secondary lines, each with a first mass flow regulator and several additional gas lines, which are each connected to a different additional gas source and in each of which a second mass flow regulator is arranged, one of the main gas secondary lines and one of the additional gas lines in each case are connected to a storage container, which is connected to a vent line each, in which a check valve or pressure relief valve is arranged, via which the respective mixed gas can be discharged from the storage container, and is connected to a mixed gas line via which the respective mixed gas from the respective storage container can be conveyed and in each of which a third mass flow regulator is arranged, with all mixed gas lines opening into the mixing zone with the main gas line.
- additional gases can thus be generated in parallel as premixed gases and fed to the main gas flow in the main gas line. Any number of additional gases can accordingly be added and, for example, different air compositions can also be mixed specifically. All mixed gases are generated continuously.
- the main gas secondary lines are all connected to the one main gas source, so that several main gas sources are not required, but rather only several branches have to be provided.
- a second storage container with a vent line is arranged between the mixing zone and the first storage container, in which a check valve or pressure relief valve is arranged and into which the first mixed gas line and a second main gas branch line open and which is connected to the mixing zone via a second mixed gas line .
- This structure creates a third mixing stage so that extremely small concentrations of the additional gas can be produced in the mixed gas without having to use extremely finely regulating mass flow regulators, since its proportion in the main gas decreases with each stage. Any number of further stages can be connected downstream of this structure, with this third stage already making it possible to produce concentrations in the ppt range, so that the verifiable limits can already be reached.
- a mass flow regulator is arranged in each of the second main gas branch line, the first mixed gas line and the second mixed gas line.
- a vent line branches off from the mixing zone of the measurement gas, in which a non-return valve or pressure relief valve is arranged.
- a check valve enables the dosing unit to operate continuously. This is of particular interest when the additional gas is added to an inexpensive main gas flow, for example on the oxygen side of the fuel cell unit, since losses of the main gas are justifiable there.
- a buffer container can then be dispensed with and still has a very fast-reacting, maximum-precision operation with little space requirement.
- a gas analyzer for each additional gas is arranged upstream of the check valve in the vent line, so that an exact analysis of the composition of the gas flow is also possible here.
- an outlet pressure regulator is arranged in the main gas line between the main gas source and the buffer tank or the non-return valve, which regulates the pressure of the main gas source, for example by about 1 bar, so that there is a pressure reserve to fill the buffer tank in the event of jumps in consumption.
- the outlet pressure regulator prevents pressure fluctuations in the main gas source from affecting the dosing unit.
- a metering unit for generating a mixed gas is thus provided with which both very small concentrations of a gas to be admixed can be mixed in the main gas flow of down to below ppt (parts per trillion) and mixtures can be produced in amounts of the same order of magnitude.
- These mixtures can consist of any number of different gases and, in preferred embodiments, can also be mixed continuously, with the proportions of the components being able to be changed continuously. Since very small amounts can be added in relation to the total amount, a pure gas source, which for example consists of a gas cylinder, can be used despite the possible continuous operation.
- a mixed gas of constant composition can be continuously generated for subsequent measurement, even in the event of larger jumps in gas consumption.
- FIG. 1 shows a flow diagram of a metering unit according to the invention.
- FIG. 2 shows a flow diagram of a second alternative metering unit according to the invention.
- FIG. 3 shows a flow diagram of a third metering unit according to the invention.
- FIG. 4 shows a flow diagram of a fourth metering unit according to the invention.
- the inventive metering unit shown in FIG. 1 is used to mix hydrogen as the main gas with carbon monoxide as an additional gas, which is mixed with the hydrogen in small amounts in order to be able to assess its effect on a fuel cell stack as the consumer 10 to be tested.
- the consumer 10 is fluidically connected via a main gas line 12 to a main gas source 14 in which the hydrogen is contained.
- a mass flow measurement and pressure control unit 16 is arranged in the main gas line 12, in which the pressure of the main gas source 14 is regulated down to the constant pressure required for the consumer 10 designed as a fuel cell unit and a corresponding mass flow is made available for the anode side of the consumer 10.
- the main gas source 14 is also via a main gas secondary line 18, which branches off from the main gas line 12, and in which a first Mass flow regulator 20 is arranged, connected to a storage container 22 which, in the present exemplary embodiment, is designed as a gas divider pipe and has a correspondingly small volume which, for example, can only correspond to the piping of the gas divider. Due to this very small volume, a change in composition is immediately available, while a storage tank that is too large would dampen a change in concentration and could possibly have a segregating effect.
- the storage container 22 is additionally connected via an additional gas line 24 in which a second mass flow regulator 26 is arranged to an additional gas source 28 in which the gas to be admixed, for example carbon monoxide, is stored.
- the mass flow controllers 20, 26 feed two regulated mass flows to the storage container 22, so that a mixed gas with a defined mixing ratio is fed to the storage container 22.
- the mixed gas is conveyed into a first mixed gas line 34 via a third mass flow regulator 36 into a mixing zone 38 in which the mixed gas line 34 opens into the main gas line 12, where the main gas flow mixes with the mixed flow.
- the check valve 32 is continuously open, so that the mixed gas flow that is not required is continuously discharged.
- a two-stage dilution of the additional gas with the mixed gas is produced in order to generate the measurement gas.
- This measurement gas is fed to the consumer 10, that is to say to the fuel cell unit in the present exemplary embodiment, via an outlet line 40 and can be fed into the main gas secondary line 18 and the additional gas line by changing the mass flows 24 can be changed continuously, with the use of a small storage volume of the storage container 22 this change can take place in very short time segments.
- the check valve 32 is constantly open in this case, so that a small mixed gas flow is lost via the vent line, but a first mixed gas is always available at a constant pressure.
- the first mass flow controller 20 is set to a volume flow of 101 / min and the second mass flow controller 26 to a volume flow of 1 ml / min, a mixed gas with an additional gas concentration in the storage container 22 of 100 ppm is produced. If a volume flow of this mixed gas of again 1 ml / min is now mixed with a main flow of 101 / min, a concentration of the additional gas in the range of about 10 ppb results.
- a buffer container 42 is arranged in the main gas line 12 in front of the mass flow measurement and pressure control unit 16, in which the measurement gas is stored and which forms the mixing zone 38 .
- the mixed gas line is connected directly to the buffer container 42 in the present exemplary embodiment.
- an outlet pressure regulator 43 is arranged between the buffer container 42 and the main gas source 14 in the main gas line 12, via which the main gas flow is regulated down to a constant pressure so that no pressure fluctuations occur at the mass flow regulators.
- the three mass flow controllers 20, 26, 36 can only react with a delay, as a result of which the composition of the measurement gas would briefly change significantly without a buffer container 42. Due to a sufficiently large design of this buffer container 42, a largely constant concentration is contained in the buffer container 42 over a certain period of time, even if too little or too much additional gas is added for a short time, because before the concentration in the buffer tank changes measurably, the mass flow controllers 20, 26, 36 react again so that the desired concentration is present in the buffer tank 42 by briefly adding a slightly larger or smaller amount of additional gas is added in order to then have the desired concentration in the buffer container 42 again.
- the size of the buffer container 42 can be designed as a function of the maximum permissible deviation in the concentration.
- FIG. 1 An expanded variant of the invention is shown in FIG.
- the metering unit accordingly initially has three parallel first main gas secondary lines 18, 18 ', 18 "which are connected to the main gas source 14.
- a first mass flow regulator 20, 20', 20" is arranged in each of these main gas secondary lines 18, 18 ', 18 "
- the metering unit has three different additional gas lines 24, 24 ', 24 "which are connected to different additional gas sources 28, 28', 28" and in each of which a second mass flow regulator 26, 26 ', 26 "is arranged.
- the dosing unit also has a further mixing stage.
- three second main gas secondary lines 44, 44 ', 44 are connected to the main gas source 14, in each of which a fourth mass flow regulator 46, 46', 46" is arranged, each in an additional second Storage tank 48, 48 ', 48 "open into which one of the first mixed gas lines 34, 34', 34" opens, in each of which the third mass flow regulator 36, 36 ', 36 "is arranged.
- This second storage tank 48, 48' , 48 is in turn connected again to a second vent line 50, 50 ', 50", in each of which a second check valve 52, 52', 52 "is arranged.
- the buffer tank 42 and thus the mixing zone 38 in this embodiment is connected to the main gas source 14 via the outlet pressure regulator 43 and a further check valve 58 in the main gas line 12, the check valve 58 serving to prevent sample gas from flowing back from the buffer tank 42 in the direction of the Main gas source and into the main gas secondary lines 18, 18 ', 18 ", 44, 44', 44" flows.
- a recirculation line 60 leads from the buffer store 42 via a pump 62 and a gas mixer 64 to three gas analyzers 66, 66 ', 66 ", which are each assigned to one of the additional gases and can determine their quantity chemically or physically in the measuring gas in a correspondingly highly sensitive manner.
- the mixture of the measuring gas in the buffer container can be continuously checked and, if necessary, via the mass flow controllers 20, 20 ', 20 “, 26, 26', 26", 36, 36 ', 36 “, 46, 46', 46” , 56, 56 ', 56 "can be readjusted.
- Downstream of the buffer container 42 is the mass flow measurement and pressure control unit 16, via which the consumer 10 is supplied with the measurement gas.
- an adjustable throttle 57 is arranged in front of the check valve 58 in the main line 12, downstream of the branching of the main gas secondary flow line 18, which can be designed as a needle valve in order to be able to adjust the mass flow in the main line 12 so that there is no excessive mass flow via the Vent line 68 is lost.
- a mass flow controller can also be used.
- the gas analyzers 66, 66 ′, 66 ′′ are arranged in the vent line 68 upstream of the check valve 70.
- This version is particularly suitable for main gas streams whose gas can be obtained inexpensively and is available in sufficient quantities.
- the dosing unit can be regulated with a very short delay so that concentrations can be changed at short notice while the measuring operation is in progress. If there is a sufficiently large pressure gradient and thus a high amount of gas that is discharged via the non-return valve 70 and the vent line 68, jumps in consumption can also be compensated, so that a highly transient operation is achieved in which metering is as accurate as possible.
- This is of interest, for example, on the cathode side, that is to say the air side of a fuel cell as consumer 10, since the air can be dosed cost-effectively as the main gas flow, so that the loss via the vent line 68 does not interfere.
- such a dosing unit can be made very small, since the buffer container can also be dispensed with and therefore no larger ones in the dosing unit Containers are more required in which segregation could occur.
- the recirculation line is also omitted
- the described embodiments accordingly enable very precise metering of one or more additional gases into a main gas flow due to the multi-stage design, with clean gases being able to be mixed in.
- the high level of accuracy can be achieved both for mixtures in which similar proportions are mixed with one another and when one or more additional gases are mixed in in the ppm, ppb or ppt range.
- such a metering unit can be operated continuously, and the concentrations can be changed during operation. A concentration can also be kept largely constant in the case of rapidly changing consumption quantities. Separation of the measuring gas is also avoided.
- check valves can also be replaced by overpressure valves that open when a defined pressure is reached. It is crucial that by using these valves in the ventilation lines there is always a mixed gas or measurement gas with sufficient pressure and thus in the desired amount without having to regulate the mass flow with a delay.
- the number of circuits connected in series and the number of parallel circuits can be adjusted depending on the application.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Metallurgy (AREA)
- Sustainable Development (AREA)
- Materials Engineering (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Sustainable Energy (AREA)
- Electrochemistry (AREA)
- Accessories For Mixers (AREA)
- Sampling And Sample Adjustment (AREA)
- Fuel Cell (AREA)
- Feeding And Controlling Fuel (AREA)
- Control Of Non-Electrical Variables (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50250/2020A AT523678B1 (en) | 2020-03-27 | 2020-03-27 | Dosing unit for generating a mixed gas |
PCT/AT2021/060103 WO2021189093A1 (en) | 2020-03-27 | 2021-03-26 | Dosing unit for generating a mixed gas |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4127855A1 true EP4127855A1 (en) | 2023-02-08 |
Family
ID=75539021
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21719025.5A Pending EP4127855A1 (en) | 2020-03-27 | 2021-03-26 | Dosing unit for generating a mixed gas |
Country Status (6)
Country | Link |
---|---|
US (1) | US20240218985A1 (en) |
EP (1) | EP4127855A1 (en) |
JP (1) | JP2023518524A (en) |
CN (1) | CN115362427A (en) |
AT (1) | AT523678B1 (en) |
WO (1) | WO2021189093A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6799603B1 (en) * | 1999-09-20 | 2004-10-05 | Moore Epitaxial, Inc. | Gas flow controller system |
JP5055883B2 (en) * | 2005-09-07 | 2012-10-24 | トヨタ自動車株式会社 | Hydrogen supply device |
JP5145667B2 (en) * | 2006-08-03 | 2013-02-20 | トヨタ自動車株式会社 | Hydrogen supply device |
US20110051546A1 (en) * | 2009-08-31 | 2011-03-03 | Steven Finley | Fluid blending apparatus and process |
WO2011045983A1 (en) * | 2009-10-14 | 2011-04-21 | 大陽日酸株式会社 | Method and apparatus for supplying hydrogen selenide mixed gas for solar cells |
US20120227816A1 (en) * | 2011-03-10 | 2012-09-13 | Xuemei Song | Dynamic gas blending |
CN209406081U (en) | 2018-12-29 | 2019-09-20 | 上海正帆科技股份有限公司 | A kind of PH3/H2 on-line mixing system |
-
2020
- 2020-03-27 AT ATA50250/2020A patent/AT523678B1/en active
-
2021
- 2021-03-26 WO PCT/AT2021/060103 patent/WO2021189093A1/en active Application Filing
- 2021-03-26 EP EP21719025.5A patent/EP4127855A1/en active Pending
- 2021-03-26 US US17/913,830 patent/US20240218985A1/en active Pending
- 2021-03-26 JP JP2022558082A patent/JP2023518524A/en active Pending
- 2021-03-26 CN CN202180025090.8A patent/CN115362427A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
AT523678A1 (en) | 2021-10-15 |
US20240218985A1 (en) | 2024-07-04 |
CN115362427A (en) | 2022-11-18 |
JP2023518524A (en) | 2023-05-01 |
WO2021189093A1 (en) | 2021-09-30 |
AT523678B1 (en) | 2021-12-15 |
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