NL2012445A - Gas flowmeter and method for measuring a gas flow. - Google Patents

Gas flowmeter and method for measuring a gas flow. Download PDF

Info

Publication number
NL2012445A
NL2012445A NL2012445A NL2012445A NL2012445A NL 2012445 A NL2012445 A NL 2012445A NL 2012445 A NL2012445 A NL 2012445A NL 2012445 A NL2012445 A NL 2012445A NL 2012445 A NL2012445 A NL 2012445A
Authority
NL
Netherlands
Prior art keywords
upright tubes
parallel upright
gas
pressure
gas flow
Prior art date
Application number
NL2012445A
Other languages
Dutch (nl)
Other versions
NL2012445B1 (en
Inventor
Kooijman Guido
Original Assignee
Univ Delft Tech
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Univ Delft Tech filed Critical Univ Delft Tech
Priority to NL2012445A priority Critical patent/NL2012445B1/en
Publication of NL2012445A publication Critical patent/NL2012445A/en
Application granted granted Critical
Publication of NL2012445B1 publication Critical patent/NL2012445B1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F3/00—Measuring the volume flow of fluids or fluent solid material wherein the fluid passes through the meter in successive and more or less isolated quantities, the meter being driven by the flow
    • G01F3/30—Wet gas-meters

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Description

Gas flowmeter and method for measuring a gas flow
The invention relates to a gas flowmeter and a method for measuring a gas flow.
The article "A simple device to measure biogas production in laboratory scale digesters" by J. Mata-Alvarez et al, and published in Biotechnology Letters volume 8 No. 10, pages 719 - 720 (1986) as well as the article "A new device for measurement and control of gas production by bench scale anaerobic digesters" by M.C. Veiga et al, and published in Wat. Res. Volume 24, No. 12, pages 1551 - 1554, 1990 disclose such a gas flowmeter and method for measuring a gas flow.
The prior art gas flowmeter comprises connected parallel upstanding tubes with a first transverse connecting tube providing a fluid connection between the parallel upstanding tubes, wherein the parallel upstanding tubes and the first transverse connecting tube are at least partly fluid filled so as to arrange that the parallel upstanding tubes have a gas receiving room above the fluid in said parallel upstanding tubes. The prior art gas flowmeter further has a gas input providing a gas input to a first of the parallel upstanding tubes and a gas output providing a gas output from a second of the parallel upstanding tubes, and it has a second connecting tube between the parallel upstanding tubes that is provided with an input aperture in the first of the parallel upstanding tubes and an output aperture discharging to the second of the parallel upstanding tubes. The input aperture is lower than said output aperture and the second connecting tube at least partly projects into a U-shaped portion extending from and below the input aperture, whilst a connecting portion of the second connecting tube extends from a leg of the U-shaped portion which is positioned next to the leg of said U-shaped portion that is provided with the input aperture, and up to the output aperture discharging into the second of the parallel upstanding tubes.
The first mentioned article relating to a prior art gas flowmeter applies electrodes in the second of the two parallel upstanding tubes to which the gas output is connected. A counter connects to the electrodes for counting the number of times of short-circuiting of these electrodes caused by the gas flow through the meter. The gas flow entering the first of the upstanding tubes pushes the fluid in the second upstanding tube through the connection embodied by the first transverse tube to a level that both electrodes in the second upstanding tube get in contact with the fluid. At that time the second connecting tube between the parallel upstanding tubes provides that gas can escape from the first upstanding tube to the second upstanding tube, eventually resulting in a gas connection between the gas receiving rooms above the fluid in both parallel upstanding tubes. For this purpose the second connecting tube is arranged with an input aperture in the first of the parallel upstanding tubes and an output aperture discharging to the second of the parallel upstanding tubes. The fluid in both parallel upstanding tubes then returns to the original (starting) levels and the process repeats until a next gas escape from the first upstanding tube towards the second upstanding tube and short-circuiting of the electrodes in the second upstanding tube occurs. The counter measuring the number of these short-circuiting's thus provides a measure for the gas flow.
The second mentioned article relates to a gas flowmeter of essentially the same construction as the gas flowmeter of the first mentioned article, yet applies an external light source and a photoelectric cell in the second upstanding tube instead of electrodes to detect the occurrence of a high fluid level in the second upstanding tube where otherwise - with the meter of the first article - the short-circuiting of electrodes would occur.
It is an object of the invention to further improve the prior art gas flowmeter and the method of measuring a gas flow.
It is a further object of the invention to provide a low-cost alternative for the known method of measuring a gas flow and the prior art gas flowmeter.
It is still a further object of the invention to provide a method for measuring a gas flow and a gas flowmeter enabling the measuring of both relatively high and relatively low flows.
It is another object of the invention to provide a method of measuring a gas flow and a gas flowmeter with improved reliability.
These and other objects and advantages of the invention which will become apparent from the following disclosure, are promoted by a method of measuring a gas flow and a gas flowmeter in accordance with one or more of the appended claims .
In a first aspect of the invention at least one of the parallel upstanding tubes is provided with means to continuously measure directly or indirectly a fluid level in the first and/or the second of the upstanding tubes. The fluid level is a measure for the gas flow through the gas flowmeter, and thus provides a real-time measurement of this gas flow. A direct measurement of the fluid level is provided when the said means to continuously measure said fluid level is for instance sonar or a driver floating on the fluid and monitored by a camera.
An indirect measurement of the fluid level is provided when the said means to continuously measure said fluid level is a pressure sensor.
Desirably at least one of the parallel upstanding tubes of the gas flow meter is provided with such a pressure sensor to measure a pressure prevailing in the concerning tube. The pressure can be measured in the fluid of the first or second upstanding tube, but it is preferred that the pressure is measured in the gas receiving room of the first of the parallel upstanding tubes. Measuring said pressure enables that a pressure profile buildup and development is measured, which can be used for calculating the level of gas flow towards the gas flowmeter.
Within the scope of the invention it is feasible that the pressure sensor operates with a predefined sample rate. Such a digitized measurement is considered to equate with an analog continuous measurement. The continuous measurement makes a very accurate real-time measurement of the gas flow possible during the pressure profile buildup in the first of the parallel upstanding tubes in the timeframe delimited by the successively occurring gas escape conditions caused by the second connecting tube between the gas receiving rooms of both upstanding tubes, which result in repeated resumption of the pressure in the first upstanding tube to a starting pressure followed by a ramp shaped pressure buildup. The ramp shaped pressure buildup is completed at the moment the gas escape conditions are again met to release gas from the first upstanding tube through the second connecting tube towards the second upstanding tube.
Advantageously the pressure sensor connects to a counter for counting the number of completed pressure ramps measured with said pressure sensor. This counter then provides the most significant information on the level of the gas flow, whereas the actual pressure buildup in the first upstanding tube provides the least significant information on the level of the gas flow. The counter together with the measured pressure buildup provide an accurate and real-time measure of the gas flow.
To derive the least significant information on the gas flow it is desirable that the pressure sensor connects to a calculation and registration organ for monitoring the pressure profile buildup and development in the first of the parallel upstanding tubes. The functionality of the above-mentioned counter can also be embodied in this calculation and registration organ.
The calculation and registration organ is suitably arranged to calculate a flow value from an intermediate pressure value between a lowest and a highest pressure value of the pressure profile buildup measured with the pressure sensor .
The invention will hereinafter be further elucidated with reference to a drawing that schematically shows an example of the gas flow meter of the invention, which is not limiting as to the appended claims.
In the following example a pressure sensor is applied to measure the pressure of the gas in the gas receiving room of the first upstanding tube that receives the gas flow to be measured, yet it is also possible to apply a pressure sensor for measuring the pressure in the fluid present in the first or second upstanding tube. It is also possible not to apply a pressure sensor at all which in fact indirectly measures the fluid level in the first or second of the upstanding tubes of the gas flowmeter, but to apply means for directly measuring this fluid level, for instance by sonar. For practical purposes it is estimated that most likely an embodiment of the gas flowmeter of the invention will be applied in which a pressure sensor will be used.
The gas flowmeter 1 of the invention comprises connected parallel upstanding tubes 2, 3 with a first transverse connecting tube 4 providing a fluid connection between the parallel upstanding tubes 2, 3. The parallel upstanding tubes 2, 3 are at least partly fluid filled so as to arrange that in particular a first tube 2 of the parallel upstanding tubes 2, 3 which will receive the gas flow to be measured has a gas receiving room 5 above the fluid in said tube 2. Due to the fluid connection provided by the first transverse connecting tube 4 also the second tube 3 will have a gas receiving room 6 above the fluid in said tube 3. Of course the first connecting tube 4 is completely filled with fluid. It goes without saying that it is possible to apply any arrangement having to parallel upstanding tube parts with a transverse fluid connection, for instance a unitary U-shaped single tube having two upstanding tube parts that are connected by the U bent.
The gas flowmeter 1 further has a gas input 7 providing a gas input to a first 2 of the parallel upstanding tubes and a gas exit 8 providing a gas output from a second 3 of the parallel upstanding tubes. Further there is a second connecting tube 9 between the parallel upstanding tubes 2, 3 that is provided with an input aperture 10 in the first 2 of the parallel upstanding tubes 2, 3 and an output aperture 11 discharging to the second 3 of the parallel upstanding tubes 2, 3. The input aperture 10 is lower than said output aperture 11 and the second connecting tube 9 at least partly projects into a U-shaped portion 9' extending from and below the input aperture 10, whilst a connecting portion 9'' of the second connecting tube 9 that ends into the output aperture 11 discharging into the second 3 of the parallel upstanding tubes 2, 3, extends from a leg 9''' of the U-shaped portion 9' which is positioned next to the leg 9'rr' of said U-shaped portion 9' that is provided with the input aperture 10. So far the gas flow meter 1 of the invention is of same construction as the prior art gas flowmeter.
The gas flow meter 1 of the invention differentiates from the prior art in that means 12 are applied to continuously measure directly or indirectly a fluid level in at least one of the upstanding tubes 2, 3. Such means 12 to continuously and directly measure said fluid level can for instance be sonar.
As mentioned above in this example an indirect measurement by means of a pressure sensor 12 will be illustrated. In this example a pressure sensor 12 is provided to measure a gas pressure in the gas receiving room 5 of the first 2 of the parallel upstanding tubes 2, 3 that receives the gas flow to be measured. It is envisaged within the scope of the invention that the pressure sensor 12 measures the pressure digitally with a predefined sample rate, which equates with an analog continuous pressure measurement.
The gas flow meter 1 of the invention operates as follows. When the gas flow meter 1 receives no gas the fluid in the upstanding tubes 2, 3 is on the level indicated with references 13 and 14. When a gas flow enters the gas receiving room 5 of the first 2 of the upstanding tubes 2, 3 this gas flow pushes the fluid in the first upstanding tube 2 downwards and correspondingly in the second upstanding tube 3 upwards through the connection embodied by the first transverse tube 4 to eventually a level that is indicated with the striped lines 13' and 14'. At that time the second connecting tube 9 between the parallel upstanding tubes 2, 3 enables that gas releases from the first upstanding tube 2 towards the gas receiving room 6 above the fluid in the second upstanding tube 3. The fluid in both parallel upstanding tubes 2, 3 then returns to the original (starting) levels 13, 14 and the process repeats in a subsequent cycle until a next gas connection between the gas receiving rooms 5, 6 of both upstanding tubes 2, 3 occurs. The pressure buildup measured by the pressure sensor 12 in the gas receiving room 5 of the first upstanding tube 2 is in a single cycle shaped as a ramp. Consecutive cycles of pressure buildups in the gas receiving room 5 result into a sawtooth shaped pressure measured by the pressure sensor 12, which is connected to a counter 15 for counting the number of completed pressure ramps (cycles) measured with said pressure sensor 12. Further the pressure sensor 12 connects to a calculation and registration organ 16 for monitoring the pressure profile buildup and development in the gas receiving room 5 of the first 2 of the parallel upstanding tubes 2, 3. The calculation and registration organ 16 is arranged to calculate a flow value from an intermediate pressure value between a lowest and a highest pressure value of the pressure profile buildup in a single cycle measured with the pressure sensor 12. The counter 15 provides the most significant information on the level of the gas flow, whereas the actual pressure buildup during a particular cycle in the gas receiving room 5 of the first upstanding tube 2 provides the least significant information on the level of the gas flow. The counter 15 together with the pressure buildup established with the calculation and registration organ 16 provide an accurate and real-time measure of the gas flow, especially during the pressure buildup during each separate cycle.
Although the invention has been discussed in the foregoing with reference to an exemplary embodiment of the apparatus and method of the invention, the invention is not restricted to this particular embodiment which can be varied in many ways without departing from the gist of the invention. The discussed exemplary embodiment shall therefore not be used to construe the appended claims strictly in accordance therewith. On the contrary the embodiment is merely in tended to explain the wording of the appended claims without intent to limit the claims to this exemplary embodiment. The scope of protection of the invention shall therefore be construed in accordance with the appended claims only, wherein a possible ambiguity in the wording of the claims shall be resolved using this exemplary embodiment.

Claims (12)

1. Gasflowmeter (1) omvattende verbonden parallelle opstaande buizen (2, 3) met een eerste dwarsverbindende buis (4) welke een vloeistofverbinding verschaft tussen de parallelle opstaande buizen (2, 3), waarbij de parallelle opstaande buizen (2, 3) en de eerste dwarsverbindende buis (4) ten minste ten dele vloeistofgevuld zijn teneinde te bewerkstelligen dat de parallelle opstaande buizen (2, 3) een gasontvangst- ruimte (5, 6) bezitten boven de vloeistof in ten minste één van genoemde parallelle opstaande buizen (2, 3), waarbij er een gastoevoer (7) is voorzien welke een gasinlaat verschaft aan een eerste (2) van de parallelle opstaande buizen (2, 3) en een gasuitgang (8) welke een gasuitvoer ver schaft vanaf een tweede (3) van de parallelle opstaande buizen (2, 3), en waarbij er een tweede verbindende buis (9) tussen de parallelle opstaande buizen (2, 3) aanwezig is met een invoeropening (10) in de eerste (2) van de parallelle opstaande buizen (2, 3) en een uitvoeropening (11) welke uitmondt naar de tweede (3) van de parallelle opstaande buizen (2, 3), welke invoeropening (10) lager is dan genoemde uitvoeropening (11) en waarbij de tweede verbindende buis (9) ten minste ten dele overloopt in een U-vormig deel (9') welke zich uitstrekt vanaf en onder de invoeropening (10), waarbij een verbindend deel (9'') van de tweede verbindende buis (9) zich uitstrekt van een been (9''') van het U-vormige deel (9') welke gepositioneerd is naast het been (9'''') van genoemd U-vormig deel (9') dat voorzien is van de invoeropening (10), en naar boven in de richting van de uitvoeropening (11) die uitmondt in de tweede (3) van de parallelle opstaande buizen (2, 3), met het kenmerk, dat ten minste één van de parallelle opstaande buizen (2, 3) voorzien is van middelen (12) voor het continu en direct of indirect meten van een vloeistofniveau in de eerste (2) en/of tweede (3) van de opstaande buizen (2, 3) .A gas flow meter (1) comprising connected parallel upright tubes (2, 3) with a first cross-connecting tube (4) which provides a fluid connection between the parallel upright tubes (2, 3), wherein the parallel upright tubes (2, 3) and the first cross-connecting tube (4) is at least partially liquid-filled to cause the parallel upright tubes (2, 3) to have a gas receiving space (5, 6) above the liquid in at least one of said parallel upright tubes (2) 3) wherein a gas supply (7) is provided which provides a gas inlet to a first (2) of the parallel upright tubes (2, 3) and a gas outlet (8) which provides a gas outlet from a second (3) of the parallel upright tubes (2, 3), and wherein a second connecting tube (9) is present between the parallel upright tubes (2, 3) with an inlet opening (10) in the first (2) of the parallel upright tubes (2, 3) and an outlet opening (11) which opens to the second (3) of the parallel upright tubes (2, 3), which inlet opening (10) is lower than said outlet opening (11) and wherein the second connecting tube (9) at least partially overflows into a U-shaped part (9 ') extending from and below the inlet opening (10), wherein a connecting part (9' ') of the second connecting tube (9) extends from a leg (9' '') of the U-shaped part (9 ') which is positioned next to the leg (9' '' ') of said U-shaped part (9') which is provided with the inlet opening (10), and upwards in the direction of the outlet opening (11) which opens into the second (3) of the parallel upright tubes (2, 3), characterized in that at least one of the parallel upright tubes (2, 3) is provided with means (12) for continuous and direct or indirectly measuring a liquid level in the first (2) and / or second (3) of the upright tubes (2, 3). 2. Gasflowmeter (1) volgens conclusie 1, met het kenmerk, dat de genoemde middelen (12) voor het continu meten van genoemd vloeistofniveau geselecteerd zijn uit de groep omvattende sonar, en een drijflichaam op genoemde vloeistof waargenomen met een camera.Gas flow meter (1) according to claim 1, characterized in that said means (12) for continuously measuring said liquid level are selected from the group comprising sonar, and a floating body on said liquid observed with a camera. 3. Gasflowmeter (1) volgens conclusie 1, met het kenmerk, dat de genoemde middelen (12) voor het continu meten van genoemd vloeistofniveau een druksensor (12) is.Gas flow meter (1) according to claim 1, characterized in that said means (12) for continuously measuring said liquid level is a pressure sensor (12). 4. Gasflowmeter (1) volgens conclusie 3, met het kenmerk, dat de druksensor (12) een druk in de gasontvangstruimte (5) van de eerste (2) van de parallelle opstaande buizen (2, 3) meet.Gas flow meter (1) according to claim 3, characterized in that the pressure sensor (12) measures a pressure in the gas receiving space (5) of the first (2) of the parallel upright tubes (2, 3). 5. Gasflowmeter (1) volgens één der conclusies 3-4, met het kenmerk, dat de druksensor (12) in verbinding staat met een teller (15) voor het tellen van het aantal complete drukramps gemeten met genoemde druksensor (12).Gas flow meter (1) according to one of claims 3-4, characterized in that the pressure sensor (12) is connected to a counter (15) for counting the number of complete pressure disasters measured with said pressure sensor (12). 6. Gasflowmeter (1) volgens één der conclusies 3-5, met het kenmerk, dat de druksensor (12) verbindt met een reken- en registratieorgaan (16) voor het monitoren van de drukprofieltoename en ontwikkeling in de gasontvangstruimte (5) van de eerste (2) van de parallelle opstaande buizen (2, 3) .Gas flow meter (1) according to one of claims 3-5, characterized in that the pressure sensor (12) connects to a calculating and recording device (16) for monitoring the pressure profile increase and development in the gas receiving space (5) of the first (2) of the parallel upright tubes (2, 3). 7. Gasflowmeter (1) volgens conclusie 6, met het kenmerk, dat het reken- en registratieorgaan (16) is ingericht voor het berekenen van een stroomwaarde uit een tussenwaarde van de druk tussen een laagste en hoogste drukwaarde van de drukprofielopbouw gemeten met de druksensor (12).Gas flow meter (1) according to claim 6, characterized in that the calculating and recording device (16) is adapted to calculate a flow value from an intermediate value of the pressure between a lowest and highest pressure value of the pressure profile structure measured with the pressure sensor (12). 8. Werkwijze voor het meten van een gasstroom door een gasstroommeter (1) door: - het verschaffen van verbonden parallelle opstaande buizen (2, 3) en een eerste dwarsverbindende buis (4) welke een vloeistofverbinding verschaft tussen de parallelle opstaande buizen (2, 3); - het voorzien dat de parallelle opstaande buizen (2, 3) en de eerste dwarsverbindende buis (4) ten minste ten dele vloeistofgevuld zijn teneinde te bewerkstelligen dat de parallelle opstaande buizen (2, 3) ieder een gasontvangstruimte (5, 6) bezitten boven de vloeistof in genoemde parallelle opstaande buizen (2, 3); - het voorzien in een gasinvoer (7) voor een gasver- binding met een eerste (2) van de parallelle opstaande buizen (2, 3 ) ; - het voorzien in een gasuitvoer (8) voor een gas verbinding met een tweede (3) van de parallelle opstaande buizen ( 2, 3) ; - het verschaffen van een tweede verbindende buis (9) tussen de parallelle opstaande buizen (2, 3) met een in-voeropening (10) in de eerste (2) van de parallelle opstaande buizen (2, 3) en een uitvoeropening (11) die uitmondt naar de tweede (3) van de parallelle opstaande buizen (2, 3); - het voorzien dat de invoeropening (10) lager ligt dan de uitvoeropening (11); - het voorzien dat de tweede verbindende buis (9) ten minste ten dele uitmondt in een U-vormig deel (9') die zich uitstrekt vanaf en onder de invoeropening (10); - het voorzien in een verbindend deel (9'') van de tweede verbindende buis(9) die zich uitstrekt van een been (9''') van het U-vormige deel (9') welke gepositioneerd is naast het been (9'''') van genoemd U-vormig deel (9') dat voorzien is met de invoeropening (10), en het voorzien dat dit verbindende deel (9'') omhoog loopt tot de uitvoeropening (11) die uitmondt in de tweede (3) van de parallelle opstaande buizen ( 2, 3) ; gekenmerkt door - het voorzien in ten minste één van de parallelle opstaande buizen (2, 3) van middelen (12) voor het continu en direct of indirect meten van een vloeistofniveau in de eerste (2) en/of de tweede (3) van de opstaande buizen (2, 3).Method for measuring a gas flow through a gas flow meter (1) by: - providing connected parallel upright tubes (2, 3) and a first transverse connecting tube (4) which provides a fluid connection between the parallel upright tubes (2, 3); - providing that the parallel upright tubes (2, 3) and the first transverse connecting tube (4) are at least partially liquid-filled in order to ensure that the parallel upright tubes (2, 3) each have a gas receiving space (5, 6) above the liquid in said parallel upright tubes (2, 3); - providing a gas inlet (7) for a gas connection to a first (2) of the parallel upright tubes (2, 3); - providing a gas outlet (8) for a gas connection to a second (3) of the parallel upright tubes (2, 3); - providing a second connecting tube (9) between the parallel upright tubes (2, 3) with an inlet opening (10) in the first (2) of the parallel upright tubes (2, 3) and an outlet opening (11 ) which opens to the second (3) of the parallel upright tubes (2, 3); - providing that the inlet opening (10) is lower than the outlet opening (11); - providing that the second connecting tube (9) at least partially opens into a U-shaped part (9 ') that extends from and below the inlet opening (10); - providing a connecting part (9 '') of the second connecting tube (9) which extends from a leg (9 '' ') of the U-shaped part (9') which is positioned next to the leg (9) '' '') of said U-shaped part (9 ') provided with the inlet opening (10), and providing that this connecting part (9' ') rises up to the outlet opening (11) which opens into the second (3) of the parallel upright tubes (2, 3); characterized by - providing at least one of the parallel upright tubes (2, 3) with means (12) for continuously and directly or indirectly measuring a liquid level in the first (2) and / or the second (3) of the upright tubes (2, 3). 9. Werkwijze volgens conclusie 8, gekenmerkt door het voorzien van ten minste één van de parallelle opstaande buizen (2, 3) van een druksensor (12) voor het meten van een druk in één van de parallelle opstaande buizen (2, 3).Method according to claim 8, characterized by providing at least one of the parallel upright tubes (2, 3) with a pressure sensor (12) for measuring a pressure in one of the parallel upright tubes (2, 3). 10. Werkwijze volgens conclusie 9, gekenmerkt door het voorzien dat de druksensor (12) een gasdruk meet in de gasontvangstruimte (5) van de eerste (2) van de parallelle opstaande buizen (2, 3) .Method according to claim 9, characterized in that the pressure sensor (12) measures a gas pressure in the gas receiving space (5) of the first (2) of the parallel upright tubes (2, 3). 11. Werkwijze volgens conclusie 9 of 10, gekenmerkt door het voorzien dat een drukprofielopbouw en ontwikkeling in de gasontvangstruimte (5) van de eerste (2) van de parallelle opstaande buizen (2, 3) gemeten wordt en gebruikt wordt voor het berekenen van de gasstroom in de richting van de gasflowmeter (1).Method according to claim 9 or 10, characterized in that a pressure profile build-up and development in the gas receiving space (5) of the first (2) of the parallel upright tubes (2, 3) is measured and used for calculating the gas flow in the direction of the gas flow meter (1). 12. Werkwijze volgens conclusie 10 of 11, gekenmerkt doordat de drukprofielopbouw en ontwikkeling in de gasontvangstruimte (5) van de eerste (2) van de parallelle opstaande buizen (2, 3) gemeten wordt gedurende iedere drukrampop-bouw die volgt op een afgeronde voorgaande drukrampopbouw.Method according to claim 10 or 11, characterized in that the pressure profile structure and development in the gas receiving space (5) of the first (2) of the parallel upright tubes (2, 3) is measured during each pressure ram construction following a rounded preceding pressure ram construction.
NL2012445A 2014-03-14 2014-03-14 Gas flowmeter and method for measuring a gas flow. NL2012445B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL2012445A NL2012445B1 (en) 2014-03-14 2014-03-14 Gas flowmeter and method for measuring a gas flow.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2012445A NL2012445B1 (en) 2014-03-14 2014-03-14 Gas flowmeter and method for measuring a gas flow.

Publications (2)

Publication Number Publication Date
NL2012445A true NL2012445A (en) 2015-11-26
NL2012445B1 NL2012445B1 (en) 2016-01-06

Family

ID=50555221

Family Applications (1)

Application Number Title Priority Date Filing Date
NL2012445A NL2012445B1 (en) 2014-03-14 2014-03-14 Gas flowmeter and method for measuring a gas flow.

Country Status (1)

Country Link
NL (1) NL2012445B1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US779352A (en) * 1904-07-20 1905-01-03 Jean Romain Dupoy Constant-level gas-meter.
GB166191A (en) * 1917-08-01 1921-07-11 William Paterson An improved method of and apparatus for controlling or measuring a small flow of chlorine gas
DE824115C (en) * 1950-06-25 1951-12-10 Andreas Hofer Hochdruck Appbau Device for measuring gases
US2876641A (en) * 1955-03-14 1959-03-10 Jersey Prod Res Co Fluid measuring apparatus
US3075384A (en) * 1959-09-16 1963-01-29 Engstrom Carl-Gunnar Daniel Apparatus for measuring quantities of gases
US4064750A (en) * 1976-06-01 1977-12-27 Speece Richard E Gas flow totalizer
DE102010025251A1 (en) * 2010-06-26 2011-12-29 Bundesrepublik Deutschland, vertreten durch den Präsidenten der Bundesanstalt für Geowissenschaften und Rohstoffe Sub-aqueous gas measuring device for quantification of e.g. air blister, which is discharged or raised under water in open water body, has passage tubular section arranged in deeper manner than tubular openings during operating conditions

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US779352A (en) * 1904-07-20 1905-01-03 Jean Romain Dupoy Constant-level gas-meter.
GB166191A (en) * 1917-08-01 1921-07-11 William Paterson An improved method of and apparatus for controlling or measuring a small flow of chlorine gas
DE824115C (en) * 1950-06-25 1951-12-10 Andreas Hofer Hochdruck Appbau Device for measuring gases
US2876641A (en) * 1955-03-14 1959-03-10 Jersey Prod Res Co Fluid measuring apparatus
US3075384A (en) * 1959-09-16 1963-01-29 Engstrom Carl-Gunnar Daniel Apparatus for measuring quantities of gases
US4064750A (en) * 1976-06-01 1977-12-27 Speece Richard E Gas flow totalizer
DE102010025251A1 (en) * 2010-06-26 2011-12-29 Bundesrepublik Deutschland, vertreten durch den Präsidenten der Bundesanstalt für Geowissenschaften und Rohstoffe Sub-aqueous gas measuring device for quantification of e.g. air blister, which is discharged or raised under water in open water body, has passage tubular section arranged in deeper manner than tubular openings during operating conditions

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
J MATA-ALVAREZ ET AL: "A SIMPLE DEVICE TO MEASURE BIOGAS PRODUCTION IN LABORATORY SCALE DIGESTERS INTRODUCTION", BIOTECHNOLOGY LETTERS, vol. 8, no. 10, 31 December 1986 (1986-12-31), pages 719 - 720, XP055155413, DOI: 10.1007/BF01032569 *
VEIGA M C ET AL: "A NEW DEVICE FOR MEASUREMENT AND CONTROL OF GAS PRODUCTION BY BENCH SCALE ANAEROBIC DIGESTERS", WATER RESEARCH, ELSEVIER, AMSTERDAM, NL, vol. 24, no. 12, 1 December 1990 (1990-12-01), pages 1551 - 1554, XP000175526, ISSN: 0043-1354, DOI: 10.1016/0043-1354(90)90090-S *

Also Published As

Publication number Publication date
NL2012445B1 (en) 2016-01-06

Similar Documents

Publication Publication Date Title
AU2016201983B2 (en) Apparatus and Method for Determining an Amount of Non- Condensable Gas
WO2015150913A3 (en) Intravascular pressure and flow data diagnostic systems, devices, and methods
CN106468590A (en) The test method of fluid flowmeter and assay device
JP2013527424A5 (en)
RU2017115034A (en) METHOD AND DEVICE FOR MONITORING, ANALYSIS, AND MESSAGE OF INFORMATION ON THE QUANTITY OF LIQUID IN THE TANK
RU2011101740A (en) METHOD AND DEVICE FOR VOLUMETRIC GAS FLOW DETECTION
BR112014028705A2 (en) test apparatus for testing drilling fluid particle setting properties, method for testing drilling fluid particle setting properties and test cell for measuring particle setting properties of a sample drilling fluid
RU2010144054A (en) METHOD FOR MEASURING VOLUME CONSUMPTION OF ELECTRICALLY CONDUCTING LIQUIDS THROUGH VESSELS
NL2012445B1 (en) Gas flowmeter and method for measuring a gas flow.
CN104568664A (en) Automatic determination device applied to kinematic viscosity of pneumatic products
CN205053801U (en) Contact detection of water level mechanism is exempted from to coffee machine
RU2441204C1 (en) Method of measuring density and level of liquid
CN204154353U (en) Water level detector and comprise the water tank of this water level detector
JP5182638B2 (en) Heat loss evaluation system and evaluation method
CN203772669U (en) Wet steam dryness online detection device
EP2341335A3 (en) Sensor assembly and method for detecting fluids with a specific material composition
Liang et al. Online liquid calibration technologies
RU2566419C1 (en) Method to determine water flow rate
US2340751A (en) Volumeter for continuous measurement
RU2488791C1 (en) Product leakage measuring device
CN102706405A (en) Water level measurement method
SU530189A1 (en) Method for determining nozzle discharge ratio
SU531034A1 (en) The method of testing trubnevnevogo installations
CN107677332A (en) It is a kind of that the new method for expanding flow measurement range is balanced using hot type
SU638850A1 (en) Method of calibrating and testing gas flowmeters

Legal Events

Date Code Title Description
MM Lapsed because of non-payment of the annual fee

Effective date: 20170401