EP3458172A1 - Unterdruck-entgasungsvorrichtung für eine flüssigkeit sowie verfahren zu deren betrieb - Google Patents
Unterdruck-entgasungsvorrichtung für eine flüssigkeit sowie verfahren zu deren betriebInfo
- Publication number
- EP3458172A1 EP3458172A1 EP17743300.0A EP17743300A EP3458172A1 EP 3458172 A1 EP3458172 A1 EP 3458172A1 EP 17743300 A EP17743300 A EP 17743300A EP 3458172 A1 EP3458172 A1 EP 3458172A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid
- pressure
- degassing
- gas
- sensor
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0036—Flash degasification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0063—Regulation, control including valves and floats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/08—Arrangements for drainage, venting or aerating
- F24D19/082—Arrangements for drainage, venting or aerating for water heating systems
- F24D19/083—Venting arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/032—Analysing fluids by measuring attenuation of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/01—Indexing codes associated with the measuring variable
- G01N2291/015—Attenuation, scattering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/024—Mixtures
- G01N2291/02433—Gases in liquids, e.g. bubbles, foams
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/102—Number of transducers one emitter, one receiver
Definitions
- the invention relates to a vacuum degassing device for a liquid according to claim 1 and a method for its operation according to claim 7 or 13.
- the invention further relates to a use of such a device or such a method according to claim 16.
- the resulting Ver ⁇ heat loss from the active region of the fuel cell must be strengge ⁇ starting removed in order to avoid local overheating (so called “not spots”). This is done most effectively by a liquid coolant that flows through the fuel cell ⁇ .
- the electrodes are in contact with a so-called bipolar plate on the side facing away from an electrolyte membrane. The purpose of the bipolar plate is to separate the individual fuel cells (media side), to provide current flow in the cell stack and to remove the heat of reaction.
- the bipolar plates can also perform a cooling function by a cooling liquid, in particular the water is passed through it. Due to its high specific heat capacity, low electrical conductivity, good fluid compatibility and low operating costs (deionized water) is used in PEM fuel cells mainly deionized water as the cooling liquid for a ⁇ set.
- the coolant may only have a very small Leitfä ⁇ ability and should be gas-free as possible so that no gas bubbles adhere to the surface of the bipolar plates, as areas with gas bubbles are cooled worse and therefore may be overheated locally.
- a lying behind the throttle proportional valve is controlled by a controller such that the component of the undissolved gas in the plant between Drossel ⁇ point and proportional valve is as small as possible.
- kon ⁇ stant temperature of the pressure of the liquid in the controlled system is measured and according to the Henry's law (or Henry Dalton see 'law) of the gas content of the fluid calculated.
- Vacuum degassing devices may be used to remove dissolved gases in liquids, including a vacuum degassing space (eg, a container) and vacuum generating means for producing a pressure below an operating pressure of the liquids to be degassed ⁇ stechnik, in particular a vacuum in the vacuum Ent ⁇ gassing space.
- the fluid to be degassed is introduced into the lower pressure ⁇ -degassing.
- the vacuum falls dissolved gas in the liquid while the bubbles and is deposited.
- 2014/029675 AI in the case that gas is detected in the measurement, issued a corresponding signal, with a switched after ⁇ vacuum degasser is turned on and operated until the liquid is again gas-free.
- ⁇ through the formation of a two-phase mixture (Gas / water) avoided in the coolant, so that a gas accumulation and thus a local overheating on the bipolar plate can not occur.
- Liquid in particular a vacuum, in the degassing ⁇ space and arranged in the vacuum degassing sensor for detecting a gas bubble portion in the entga ⁇ send liquid.
- the invention is based on the consideration that in a vacuum degassing already a liquid to be degassed is already relaxed and thereby dissolved gas precipitates in the form of small bubbles. This effect can be used not only to reduce the gas content, but also to monitor and / or determine the gas content or gas saturation state of the liquid.
- the liquid flow in the degasification space, in particular the incoming liquid flow can be observed with the sensor.
- Liquid also increases the pressure in the degassing, initially creates a large amount of gas bubbles. With increasing pressure in the room, the amount and size of the gas bubbles Smaller, until a pressure is exceeded at which no more bubbles. This pressure is related to the dissolved amount of gas via Henry's Law.
- vorlie ⁇ constricting conditions eg filling level of the liquid in the degassing chamber, pressure in the degassing chamber
- vorlie ⁇ constricting conditions eg filling level of the liquid in the degassing chamber, pressure in the degassing chamber
- given given conditions eg defined pressure range in the degassing, defined range for the level height in the degassing
- the gas content can continuously, cyclically or when predefined boundary conditions are reached (eg reaching a predefined fill level of the liquid in the degassing space or a predefined pressure in
- Will be degassing is calculated and monitored for reaching, overwriting ⁇ th and / or below a threshold value and concluded at an unacceptably high or approved high gas concentration
- gas bubble fraction is understood to mean the proportion of the volume of the gas bubbles (ie of the gas dissolved) in relation to a defined measuring volume. void fraction is determined by the amount of gas bubbles and their large ⁇ SSE. For measuring the gas void fraction may be understood for waves menippo together by a change in a ⁇ Ver change in the transmission and reflection of the liquid fluid / gas from the liquid is caused.
- the invention thus intelligently uses the degasification process in a vacuum degassing device in order to monitor and / or determine the gas content or gas saturation state of a liquid by means of a sensor integrated therein. This results in a significantly reduced apparatus and cost and space requirements compared to a separate from the degassing monitoring and / or measuring device for the gas content.
- a vacuum degassing device in order to monitor and / or determine the gas content or gas saturation state of a liquid by means of a sensor integrated therein.
- Another advantage is that all different types of dissolved gases are taken into account.
- a gas that does not bubble at high concentration may remain in the cooling liquid while another gas that bubbles out at a lower concentration is safely detected and removed.
- it can be used commercially available vacuum degassing (eg vacuum degasser), which only need to be supplemented by the sensor.
- vacuum degassing eg vacuum degasser
- a particularly accurate measurement of the gas content is mög ⁇ Lich here if the degassing chamber holds a container having a supply pipe for liquid to be degassed to the container implement and the sensor is arranged in the supply line. Since the diameter of the supply line is usually smaller than that of the container, it is there to a particular star ⁇ ken development and good distribution of the gas bubbles and the haze can be determined very precisely.
- the pressure of the fluid must be known.
- a pressure sensor for determining the pressure of the liquid in the degassing space is present for this purpose.
- a sensor for determination a level of liquid level in the degassing be present and be closed on the basis of the level of the pressure. If the device still further comprises a temperature sensor for determining the temperature of the liquid, then a determination of the gas saturation level of the gas or ⁇ content using the Henry's law in the whole pressure / temperature range is possible.
- the detection of the gas bubble fraction can be effected in a particularly simple and cost-effective manner by the sensor comprising a transmitter for irradiating the liquid with a wave-shaped signal, in particular an ultrasonic signal, and a detector for measuring the wave-shaped signal after contact with the liquid.
- the sensor comprising a transmitter for irradiating the liquid with a wave-shaped signal, in particular an ultrasonic signal, and a detector for measuring the wave-shaped signal after contact with the liquid.
- a transmitter for irradiating the liquid with a wave-shaped signal in particular an ultrasonic signal
- a detector for measuring the wave-shaped signal after contact with the liquid.
- other optical or physical methods are possible.
- the vacuum generating device for generating the gas bubbles comprises a pressure throttle, in particular a nozzle, and a pump.
- the pressure throttle is preferably arranged in a supply line for liquid to be degassed.
- the pump is preferably either a degassed liquid feed pump located in a degassed liquid discharge line or a vacuum pump (especially vacuum pump) connected to the degassing space.
- a pressure below an operating pressure of the liquid, in particular a vacuum is generated in a first step in the vacuum degassing space, and in a second step the liquid to be degassed is introduced into the vacuum degassing space introduced, wherein in the introduced into the degassing liquid with the sensor, a gas bubble fraction is detected.
- the second step can then be continuously, cyclically or upon reaching a predetermined or predetermined pressure of the liquid to be degassed in the degassing and / or upon reaching a predetermined or predetermined level in the degassing space, the gas bubble content to be compared with a threshold and a signal generated if the gas bubble content reaches the threshold, exceeds (ie, the gas content is impermissibly high) and / or falls below (ie, the gas content is permissible high).
- This signal can then be evaluated and, for example, in the case of a fuel cell system, an error reaction (eg a power reduction) initiated.
- the gas content in the degassing space may also be continuous, cyclical or upon reaching or exceeding a predetermined or predefinable threshold value for the pressure of the liquid to be degassed in the degassing space and / or upon reaching or exceeding a predetermined or predefinable level Liquid can be determined on the basis of the Henry Law.
- the gas content thus determined can then be evaluated and if unzuläs ⁇ sig an error reaction be initiated high. If, in addition, the temperature of the liquid is measured, the threshold value for the pressure, the fill level and / or the threshold value for the gas bubble fraction can be predefined as a function of the temperature.
- liquid to be degassed is introduced into the vacuum degassing space, wherein the pressure of the liquid to be degassed in the vacuum degassing space to a predetermined or
- the degassing device is thus supplied with a continuous liquid volume flow.
- the gas bubbles can then be generated when the gas void fraction reaches the threshold value, exceeds and / or falls ⁇ tet with a threshold value and a signal vergli ⁇ chen.
- This signal can then be evaluated and, for example, in the case of a fuel cell system, an error reaction (eg a power reduction) initiated.
- the pressure is known, the gas content can also be determined on the basis of Henry's Law. If in addition the temperature of the liquid is measured, the value of the pressure in dependence on the temperature Tem ⁇ can be specified. Thereby monitoring and / or determination of the gas saturation level of the gas or ⁇ content in the whole pressure / temperature range is possible.
- a particularly advantageous use of the above erläu ⁇ failed apparatus or method described above lies in the monitoring and / or determination of the gas saturation level or gas content of a liquid in a cooling or heating circuit, in particular a cooling liquid of an electrochemical cell such as a fuel cell.
- FIG. 3 shows a detailed representation of the ultrasonic sensor of FIG.
- FIG. 1 shows a simplified representation of a fuel cell lena position 1, comprising a fuel cell module 2, the egg ⁇ NEN stack 3 of the fuel cell 4 which is surrounded by a protective casing 5, the N2 nitrogen as
- Inert gas is filled.
- the fuel cells 4 of the fuel cell stack 3 ⁇ operable with gaseous oxygen 02, and water serstoff H2 as the reactants.
- a Wasserstoffzu- driving circuit 6 serves to supply of hydrogen H2 to the fuel cell stack 3 and a hydrogen discharge pipe 7 is used for the discharge of (residual) hydrogen from the fuel ⁇ cell stack 3.
- an oxygen supply line 8 for the supply of oxygen 02 to the
- the discharged via the discharge lines 7, 9 (residual) oxygen and (residual) hydrogen can then either entirely from the fuel cell system. 1 be discharged or fed in ei ⁇ nem circulation operation the fuel cell 4 via the supply lines 6, 8 again.
- Nitrogen N2 can also be used for purging the gas chambers of the fuel cells 3, for example when the fuel cell system 1 is switched off.
- the fuel cell stack 3 is cooled by a cooling liquid circuit 10.
- the cooling liquid is passed through this non-illustrated bipolar plates of the fuel cell ⁇ . 4
- the cooling liquid used is preferably deionized water.
- the coolant circuit 10 comprises, for example, a memory 11 for the cooling fluid. stechnik, a feed pump 12 for the cooling liquid, a negative pressure degassing device 13, a supply line 14 for supplying cooling liquid to the fuel cell stack 3 and a discharge line 15 for the removal of cooling liquid from the fuel cell stack. 3
- a controller 16 is used to control the operation of the fuel cell system 1.
- the fuel cell system 1 is consequently operated with the three Be ⁇ operating gases hydrogen H2, oxygen 02 and nitrogen N2.
- gelan ⁇ gene by low leakage hydrogen, oxygen and / or nitrogen in the cooling liquid.
- the vacuum degassing device 13 serves to detect and reduce the gas content of the cooling liquid and is shown in more detail in FIG.
- the vacuum degassing device 13 is connected with its terminals 21, 22 to the cooling circuit 10 so that an inlet 23 on the high pressure side and a return ⁇ run 24 on the low pressure side of the cooling circuit 10 befin ⁇ the.
- the vacuum degassing device 13 comprises, surrounded by a common housing 25, a vacuum degassing ⁇ space 26, in turn, a container 27, a supply line 28 for degassing liquid, a discharge line 29 for degassed liquid and a discharge line (Entlwestungslei ⁇ tion) 44 for dissolved gas.
- a negative pressure generating device 30 serves to generate a pressure below an operating pressure to be degassed coolant (ie, below the pressure of the cooling ⁇ liquid in the circuit 10, in particular of a vacuum, in the degassing chamber 26) and thus to generate gas bubbles in the to be degassed Liquid.
- the vacuum generating device 30 comprises a nozzle 31 arranged at the inlet of the feed line 28 and a controllable feed pump 32 for the liquid arranged at the outlet of the discharge line 29.
- the nozzle 31 is thus arranged in front of the degassing chamber 26 and the pump 32 after the degassing 26th
- a vacuum pump (vacuum pump) 46 may be connected via a not-shown valve to the degassing space ⁇ addition.
- a sensor 33 arranged in the supply line 28 serves to detect a portion of gas bubbles in the cooling liquid to be degassed.
- the sensor 33 comprises - as shown in simplified manner in FIG. 3 - a transmitter 34 for irradiating the liquid with an ultrasound signal, a detector 35 for measuring the ultrasound signal after contact with the liquid and a measuring cell 37 permeable to the ultrasound signal.
- the detector 35 is present is provided for a measurement of the transmitted through the cooling liquid in the measuring cell 37 ultrasonic ⁇ signal and is arranged such that the measuring cell 37 is located between it and the transmitter 34.
- a second detector 36 can be present, which is arranged on the same side of the measuring cell 37 as the transmitter 34 and measures the ultrasonic signal reflected by the cooling liquid.
- the degassing device 13 comprises a pressure sensor 40 arranged on the container 27 for determining the
- a controllable valve 43 In the discharge line 29 is a controllable valve 43 and in the ⁇ to the container 27 ⁇ closed vent line 44 for discharging dissolved gas, a controllable valve 45 is connected.
- In the inlet 23 is a temperature sensor 50 for determining the temperature of the Liquid, a pressure sensor 51 for measuring the operating ⁇ pressure of the cooling liquid in the inlet 23 to the Entgasungsvor ⁇ direction 13 and a controllable valve 52 connected.
- a control and evaluation device 60 detects the signal generated by the sensors or detectors 35, 36, 40, 41, 42, 50, 51 via signal lines and controls via control ⁇ lines the controllable valves 43, 45, 52, the pump 32 and the transmitter 34.
- the Ven ⁇ tile 43, 45 and 52 are closed here.
- the valve 52 is then opened and then liquid is sucked from the inlet 23 via the nozzle 31 and the supply line 28 into the container 27 by the negative pressure in the degassing space 26.
- the sensor 33 By the sensor 33, a gas bubble fraction is detected in the liquid flowing through the supply line 28. In this case, is measured with the pressure sensor 40, the pressure in the container 27 and gemes ⁇ sen to the sensors 50, 51 the temperature or pressure of the liquid in the inlet 23rd
- the level in the container 27 is measured by means of the sensors 41, 42.
- From the control and evaluation device 60 can then continuously, cyclically or upon reaching a predetermined or predetermined pressure in the container of the liquid to be degassed in the degassing and / or upon reaching the signaled by the level sensor 41 level in the container 27, the gas bubble content with a threshold Vergli ⁇ chen and a signal S are generated when the gas ⁇ blower portion reaches or exceeds the threshold (ie, the gas content is impermissibly high) and / or falls below (ie, the gas content is permissible high).
- This Sig ⁇ nal can then output to the system controller 16 and from an error response of the fuel cell system (eg, a power reduction) be initiated.
- the dissolved gas collects in the upper region of the container 27 and can be discharged by opening the valve 45 via the venting ⁇ performance 44.
- the second step can also be continuously, cyclically or when reaching or exceeding a predetermined or predeterminable threshold value for the pressure in the container 27 and / or upon reaching or exceeding the signaled by the level sensor 41 level by the control and evaluation device 60, the gas content in the liquid ness based on Henry's law determined (ie be ⁇ included). The gas content so determined can then be evaluated and if ⁇ be initiated unacceptably high by generating a signal S for the system controller 16 an error response.
- the threshold value for the pressure and / or the threshold value for the gas bubble fraction can be predetermined as a function of the temperature.
- monitoring and / or determination of the gas saturation state or of the gas content in the entire pressure / temperature range is possible with the aid of the Henry Law.
- the liquid state in the container 27 can then be brought back to the initial state in which no or only little liquid is present in the container 27.
- the first, the second and the third step can be cyclically repeated and thus a quasi-continuous operation can be performed.
- the vacuum degassing device 13 For the operation of the vacuum degassing device 13, it is first brought into a ready-to-operate state by means of a suitable filling and venting process.
- the pump sucks 32 with open Venti ⁇ len 52, 43 and closed valve 45, the liquid from the container 27 and thus generates in this a negative pressure.
- the nozzle 31 and the pump 32 are for this purpose ⁇ sioned in accordance with dimen.
- the gas bubble content is determined by the amount and size of the gas bubbles.
- the gas bubble development and size is in addition to the saturation state of the liquid from the pressure difference between inlet 23 and the interior of the container 27, the temperature of
- the degassing device 13 a continuous liquid volume flow from the cooling circuit 10 is supplied.
- the gas void fraction is then compared by the control and evaluation ⁇ device 60 with a threshold value and from this generates a signal S and output to the higher-level systems ⁇ controller 16 when the gas void fraction to
- Threshold reached exceeds and / or falls below.
- This signal can then be evaluated by the parent Anlagensteue ⁇ tion 16, and an error response (such as a tung Leis ⁇ reduction) to be initiated.
- an error response such as a tung Leis ⁇ reduction
- the value of the pressure which is regulated in the container 27, can be predetermined as a function of the temperature. Alternatively, an exact calculation of the gas content in the entire temperature range is possible.
- the methods described here thus come to gas content monitoring or detection without further additional measuring ⁇ device. It is observed only formed during the degassing anyway bubble stream and determines, for example, from egg ⁇ ner simple temperature and pressure measurement of the gas content and gas saturation.
- the nozzle 31 can be additionally heated or the liquid is additionally degassed with ultrasound ⁇ who.
- FIGS. 1 to 3 can likewise be transferred to cooling circuits of other technical devices in which reliable cooling lines are required. It can also be applied to many other fluid circuits, e.g. Heating circuits (e.g., central heating) are transmitted.
- Heating circuits e.g., central heating
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Thermal Sciences (AREA)
- Acoustics & Sound (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel Cell (AREA)
- Degasification And Air Bubble Elimination (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16181943.8A EP3275524A1 (de) | 2016-07-29 | 2016-07-29 | Unterdruck-entgasungsvorrichtung für eine flüssigkeit sowie verfahren zu deren betrieb |
PCT/EP2017/068071 WO2018019649A1 (de) | 2016-07-29 | 2017-07-18 | Unterdruck-entgasungsvorrichtung für eine flüssigkeit sowie verfahren zu deren betrieb |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3458172A1 true EP3458172A1 (de) | 2019-03-27 |
Family
ID=56555328
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16181943.8A Withdrawn EP3275524A1 (de) | 2016-07-29 | 2016-07-29 | Unterdruck-entgasungsvorrichtung für eine flüssigkeit sowie verfahren zu deren betrieb |
EP17743300.0A Pending EP3458172A1 (de) | 2016-07-29 | 2017-07-18 | Unterdruck-entgasungsvorrichtung für eine flüssigkeit sowie verfahren zu deren betrieb |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16181943.8A Withdrawn EP3275524A1 (de) | 2016-07-29 | 2016-07-29 | Unterdruck-entgasungsvorrichtung für eine flüssigkeit sowie verfahren zu deren betrieb |
Country Status (2)
Country | Link |
---|---|
EP (2) | EP3275524A1 (de) |
WO (1) | WO2018019649A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108956778A (zh) * | 2018-08-03 | 2018-12-07 | 德淮半导体有限公司 | 超声波扫描显微镜水处理装置、及其使用方法 |
WO2020104420A1 (de) * | 2018-11-20 | 2020-05-28 | Fachhochschule Nordwestschweiz Fhnw | Vorrichtung zur entgasung von flüssigkeiten |
NO20191352A1 (no) * | 2019-11-14 | 2021-05-17 | Searas As | Fremgangsmåte for å bestemme mengden av en gass oppløst i en væske |
DE102020202024A1 (de) | 2020-02-18 | 2021-08-19 | Thyssenkrupp Ag | Vakuumentgaser mit einer Messfunktion zur Ermittlung der Konzentration an gelöstem Gas in einem Fluid und Verfahren zum Betreiben des Vakuumentgasers |
DE102022112153A1 (de) | 2022-05-16 | 2023-11-16 | Vaillant Gmbh | Verfahren zur Entgasung eines Heizkreises, Computerprogramm, Regel- und Steuergerät und Klimagerät |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4400385C2 (de) | 1994-01-08 | 1997-02-20 | Horst Dipl Ing Peschel | Verfahren und Vorrichtung zum kontinuierlichen Messen des Gasgehaltes in Flüssigkeiten, insbesondere in in Schmiermittelkreisläufen befindlichen Mineralölen |
AT409673B (de) | 2001-03-23 | 2002-10-25 | Anton Paar Gmbh | Verfahren und vorrichtung zur bestimmung der gehalte von in flüssigkeiten gelösten gasen |
AU2003233490A1 (en) * | 2002-04-08 | 2003-10-27 | Dominion Engineering, Inc. | Liquid degassing system for power plant system layup |
EP2700940A1 (de) * | 2012-08-21 | 2014-02-26 | Siemens Aktiengesellschaft | Verfahren und Vorrichtung zur Messung des Gasgehalts in einer Flüssigkeit sowie Verwendung einer solchen Vorrichtung |
EP2873649A1 (de) * | 2013-11-13 | 2015-05-20 | Mitsubishi Electric Corporation | Wasserkreislaufsystem mit Entgasungsvorrichtung |
DE102014222510A1 (de) * | 2014-11-04 | 2016-05-04 | Robert Bosch Gmbh | Vorrichtung zum Entgasen einer Hydraulikflüssigkeit |
-
2016
- 2016-07-29 EP EP16181943.8A patent/EP3275524A1/de not_active Withdrawn
-
2017
- 2017-07-18 WO PCT/EP2017/068071 patent/WO2018019649A1/de unknown
- 2017-07-18 EP EP17743300.0A patent/EP3458172A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
EP3275524A1 (de) | 2018-01-31 |
WO2018019649A1 (de) | 2018-02-01 |
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