WO2022112245A1 - Procédé de mesure de débit et/ou de volume dans une canalisation conductrice de fluide avec des volumes d'écoulement largement fluctuants, et agencement pour la mise en œuvre du procédé - Google Patents

Procédé de mesure de débit et/ou de volume dans une canalisation conductrice de fluide avec des volumes d'écoulement largement fluctuants, et agencement pour la mise en œuvre du procédé Download PDF

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Publication number
WO2022112245A1
WO2022112245A1 PCT/EP2021/082676 EP2021082676W WO2022112245A1 WO 2022112245 A1 WO2022112245 A1 WO 2022112245A1 EP 2021082676 W EP2021082676 W EP 2021082676W WO 2022112245 A1 WO2022112245 A1 WO 2022112245A1
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WO
WIPO (PCT)
Prior art keywords
fluid
component
flow
pressure
bypass
Prior art date
Application number
PCT/EP2021/082676
Other languages
German (de)
English (en)
Inventor
Mulundu Sichone
Miguel Linares
Original Assignee
PYDRO GmbH
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 PYDRO GmbH filed Critical PYDRO GmbH
Priority to EP21820477.4A priority Critical patent/EP4251957A1/fr
Publication of WO2022112245A1 publication Critical patent/WO2022112245A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F7/00—Volume-flow measuring devices with two or more measuring ranges; Compound meters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
    • G01F1/10—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects using rotating vanes with axial admission
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F5/00—Measuring a proportion of the volume flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F7/00—Volume-flow measuring devices with two or more measuring ranges; Compound meters
    • G01F7/005—Volume-flow measuring devices with two or more measuring ranges; Compound meters by measuring pressure or differential pressure, created by the use of flow constriction

Definitions

  • the invention relates to a method for flow and / or quantity measurement in a fluid-carrying pipeline with greatly fluctuating flow rates and an arrangement for carrying out the method.
  • a pitot tube can be used for flow and quantity measurement in a pipe system, with a small tube within a pipeline being aligned with the flow so that the flow hits a pipe opening head-on in order to carry out a measurement.
  • this method of measurement has a very high flow profile sensitivity.
  • Woltmann meters are suitable for nominal flow rates (Qn) of 15 m 3 /h to 1500 m 3 /h.
  • Qn nominal flow rates
  • Woltmann meters work according to the principle of measuring currents using hydrometric vanes described by the German hydraulic engineer Reinhard Woltmann in 1790.
  • Typical pipe diameters range from nominal sizes DN 50 to DN 500.
  • Compound water meters are therefore used in cases where the measuring range of a simple meter is not sufficient to accurately record all flows that occur. They consist of a bulk water meter as the main meter, usually an impeller flow meter, a domestic water meter as an auxiliary meter and a switching valve.
  • the switching valve controls the switching on and off of the large main meter, which is usually designed as a Woltmann meter and the volume measurement only for larger, predetermined flow rates in addition to the secondary counter. When certain flow rates are reached, the switching valve opens or closes.
  • Compound water meters have the disadvantage that they are more expensive than simple water meters because two meters and a switching valve are used, which switches between large and small flow rate measurements. Furthermore, two separate values must be recorded and totaled for the reading, which leads to additional expenditure for cabling, reading and data processing or billing. Another technical and economic disadvantage results from the necessary switching processes between the main meter and the secondary meter. Depending on whether the flow is increasing or decreasing, there are different measurement errors in the switching range. In addition, the compound water meter consists of many moving individual parts, which makes the compound water meter more susceptible to wear and requires additional effort for calibration and verification. Further disadvantages result from additional pressure losses and associated energy losses caused by the built-in switching valve.
  • a composite water meter with an ultrasonic transducer as the main water meter is known from disclosure DE102013008781 B4.
  • the switching valve is kept closed until a predefined flow rate is recorded in the secondary meter. Only when the flow rate increases does the changeover valve open automatically so that a flow rate can be set that is in the optimum measuring range of the main meter.
  • the method according to the invention for flow rate and/or quantity measurement is carried out in a fluid-carrying pipeline with greatly fluctuating flow rates.
  • the fluid-carrying pipeline has at least one component which causes a pressure loss in the fluid-carrying pipeline.
  • the method has the following method steps: a. Carrying out a flow and/or quantity measurement in a bypass, the bypass being arranged on the fluid-carrying pipeline in such a way that part of the fluid can bypass the component, and/or detecting the pressure loss in the fluid-carrying pipeline caused by the component, b. determining an operating mode of the component, c. Selection of a characteristic based on the determined one
  • An operating mode can be, for example, engine operation, generator operation, idling operation or standstill.
  • At least one characteristic curve of the at least one component is preferably recorded before method step a).
  • a characteristic curve is recorded for a specific operating mode. For example, when using the operating modes engine operation, generator operation and idling operation, three characteristic curves are recorded, with a first characteristic curve for the engine operation operating mode, a second characteristic curve for the generator operation mode and a third characteristic curve for the idling operating mode being determined. Recording additional characteristics for additional operating modes is conceivable, for example a fourth characteristic for a standstill.
  • the characteristic curves can be recorded, for example, by means of a test stand.
  • a test stand which has a calibrated flow meter
  • the relationship between the flow in the pipeline and the flow in the bypass can be recorded for each operating mode.
  • a function/equation is created which is used to form an inverse function.
  • the values for the flow in the pipeline are determined with the aid of the inverse function.
  • a measurement of a rotational speed of the component is carried out to determine the operating mode.
  • the current operating mode of the component can be inferred from the determined speed.
  • the pressure difference is formed from a pressure that is in front of the rotating component and a pressure that is behind the rotating component.
  • the pressure difference is formed from a pressure that is in front of the rotating component and a pressure that is behind the rotating component, according to various embodiments.
  • a first pressure P1 is measured in front of the component and a second pressure P2 is measured after the component, and from this a pressure difference DR between P1 and P2 is determined.
  • the pressure measurement is preferably a dynamic pressure measurement. Differential pressure sensors can also be used for this.
  • a flow can be measured in a bypass, which leads around the rotating component.
  • the arrangement has a fluid-carrying pipeline, the fluid-carrying pipeline also having at least one component which causes a pressure loss in the fluid-carrying pipeline, and the fluid-carrying pipeline has a bypass, softersuch on the fluid-carrying Pipeline is arranged that the fluid can bypass the component, further comprising at least one sensor unit and an evaluation unit.
  • the at least one component is coupled to an electromechanical converter, with the electromechanical converter preferably having a speed controller in motor operation and/or in generator operation.
  • the at least one component is driven in such a way that a specific pressure difference DR is set between the pressure P1 in front of the rotating component and the pressure P2 after the rotating component.
  • the flow rate in the pipe can be adjusted by using the filter, for example the pressure loss can be minimized. However, this can lead to a different characteristic depending on the value to which the pressure drop is reduced. On the one hand, one would try to reduce the pressure losses caused by the rotating component. A corresponding evaluation unit and/or a corresponding software program would have to include the falsification in the calculation.
  • the inventive method for flow and quantity measurement is for use in a measuring device for fluid-carrying pipelines with strongly fluctuating flow rates, which at least one has a rotating component, determined, the rotating component causing a pressure loss.
  • the rotating component is an impeller.
  • the device has a sensor unit, the sensor unit being designed to carry out the pressure loss measurements in the pipe system and/or the flow measurements or quantity measurements in a bypass.
  • the pressure (P1) in front of and the pressure (P2) behind the rotating component which is, for example, an impeller, is measured, for example, by means of two absolute pressure sensors and/or relative pressure sensors and/or by means of a differential pressure sensor.
  • the flow or the quantity in the bypass which leads around the rotating component, which is, for example, an impeller, is measured, for example, by means of an ultrasonic flow meter or magnetic-inductive flow meter or by means of a water meter.
  • a computer program can be used which evaluates sensor data, for example pressures and/or quantities and/or flow rate data, for flow rate and quantity determination.
  • the computer program recognizes that the pressure difference between the pressure in front of the rotating component and a pressure after the rotating component or the flow in the bypass is related to a specific flow or a quantity in the fluid-carrying pipeline system.
  • the advantage of this invention is that fewer structural parts are required, thereby reducing the maintenance effort or the effort for calibration and the pressure loss. [0035] Furthermore, the invention enables a precise and cost-effective method for flow rate and quantity measurement in fluid-carrying pipelines with strongly fluctuating flow rates.
  • FIG 1 An impeller meter installed in a pipeline
  • Figure 2 Exploded view of meter showing flow measurement and volume measurement in a bypass
  • Figure 3 Diagram describing the behavior of bypass flow or pressure drop as a function of flow in the pipe
  • connection as well as “coupled” used to describe both a direct and an indirect connection (e.g. ohmic and/or electrically conductive, e.g. in an electrically conductive connection), a direct or indirect connection and a direct or indirect coupling.
  • an indirect connection e.g. ohmic and/or electrically conductive, e.g. in an electrically conductive connection
  • a direct or indirect connection e.g. in an electrically conductive connection
  • Coupled or “coupling” can be understood in the sense of a mechanical, hydrostatic, thermal and/or electrical connection.
  • Coupled can be understood in the sense of a mechanical (physical or physical) coupling.
  • a clutch may be configured to transmit mechanical interaction (e.g., force, torque).
  • FIG. 1 shows an arrangement (1) according to the invention.
  • the arrangement (1) for carrying out the method according to the invention according to claim 1 has a fluid-carrying pipeline (2).
  • the fluid-carrying pipeline (2) has at least one component (8) which causes a pressure loss.
  • the arrangement (1) according to the invention and/or the fluid-carrying pipeline (2) has a bypass (6) which is arranged on the fluid-carrying pipeline (2) in such a way that the fluid can bypass the component (8).
  • the arrangement (1) has at least one sensor unit (10) and an evaluation unit. According to various embodiments, this is at least one
  • Component (8) is movably mounted and/or is coupled to an electromechanical converter (7).
  • the at least one component (8) is preferably an impeller.
  • the electromechanical converter (7) has a
  • the at least one component 8 has a drive device. It is preferably driven in such a way that a certain pressure difference DR between the pressure P1 upstream of the component 8 and the pressure P2 downstream of the component 8 is established.
  • FIG. 1 shows a measuring device 1 in a fluid-carrying pipe system/pipeline 2 which is connected via a flange connection between flanges 4 and 5 by means of a screw connection 3 .
  • a bypass system 6 with a flow meter for measuring the flow and amount in the bypass is shown.
  • FIG. 2 shows an exploded view of the arrangement according to the invention for flow rate and quantity measurement in fluid-carrying pipelines with strongly fluctuating flow rates, the device having a measuring device 1 for installation in a fluid-carrying pipe system 2.
  • the arrangement also has at least one rotating component 8 which is arranged in the bulb turbine 1 and causes a pressure loss in the fluid-carrying tube system 2 . The pressure loss in turn causes part of the flow to be diverted through the bypass 6 .
  • the arrangement has a computer unit (not shown here), which is designed to evaluate sensor data for determining flow and quantity.
  • a computer program uses the sensor data to identify the flow in the bypass 6 and reproduces the flow and/or quantity in the fluid-carrying pipeline system 2 in relation thereto.
  • the device has a sensor unit 10 for flow rate and quantity measurement or pressure difference.
  • the sensor unit 10 is mounted on the bypass 6 connecting the front holes and fittings 12 to the rear holes and fitting s13
  • One or more holes and fittings 12 can be located behind the rotating component 8 .
  • the pressure difference DR is formed from a pressure P1, which prevails in front of the rotating component 8 and a pressure P2, which prevails after the rotating component 8 in the pipe system.
  • the pressure difference DR and the bypass flow are equivalent to each other since a given pressure difference DP causes an equivalent bypass flow.
  • the bypass 6 consists of a bypass channel 11 and the sensor unit 10.
  • the bypass channel can consist of various fittings and pipes of different materials, shapes and sizes.
  • the sensor 10 may be a magnetic flowmeter, mechanical turbine type, ultrasonic or other type.
  • the method according to the invention for flow and/or quantity measurement in a fluid-carrying pipeline 2 with strongly fluctuating flow rates, the fluid-carrying pipeline 2 having at least one component 8 which causes a pressure loss, has the following method steps:
  • the pressure loss caused by the component 8 in the fluid-carrying pipeline 2 can be detected. It is also conceivable to carry out both alternatives and to compare them with one another in order to achieve more precise measurement results.
  • an operating mode of the component 8 is determined. Furthermore, a selection is made Characteristic curve (14, 15, 16, 17, 18, 19, 20) based on the determined operating status.
  • the flow rate and/or the quantity in the fluid-carrying pipeline 2 is determined using the measured flow rate and/or the measured quantity in the bypass 6 and/or by means of the determined pressure loss in the fluid-carrying pipeline 2 using the selected characteristic (14, 15, 16, 17, 18, 19, 20).
  • An operating mode is, for example, engine operation, generator operation, idling operation or standstill.
  • characteristic curves 14, 15, 16, 17, 18, 19, 20 are recorded and stored before method step a).
  • An appropriate storage medium can be used to store the characteristic curve.
  • a first characteristic curve for the engine operation mode is determined (not shown here).
  • the motor operation operating mode can also be referred to as pump operation.
  • a second characteristic curve for the generator operation mode is determined (16).
  • a third characteristic curve for the idling operating mode is determined (18). In the idle operating mode, the electromechanical converter is decoupled.
  • a fourth characteristic curve for the standstill operating mode is determined (14).
  • the flow in the pipeline can be calculated using the bypass flow value registered by the sensor 10 using the various characteristic curves.
  • FIG. 3 shows a diagram which describes the behavior of the bypass flow as a function of the pipe flow. The more flow there is in the fluid-carrying pipe system 2, the more Flow prevails in the bypass 6, since the rotating component 8 generates a greater pressure drop.
  • the rotating component 8 is coupled to at least one electromechanical converter 7, so that there are different operating modes with different causal effects, for example energy recovery in generator operation, or pressure loss reduction in engine operation. These modes of operation mean that the relationship between flow in pipe 2 and flow in bypass 6 is not continuous.
  • FIG. 3 shows a rotating component 8 at rest (standstill operating mode).
  • the characteristic curve 16 of the curve shown shows how the flow rate of the bypass 6 increases with the increase in the flow in the pipe 2 when the generator operation mode is set. In this case at least one component 8 rotates and generates electricity.
  • a control unit acts at point 17 by isolating the component 8 from an electromechanical converter 7 to produce a lower pressure drop.
  • Section 18 describes how the flow in bypass 6 continues to increase when component 8 is idling (electromechanical converter is decoupled).
  • a computer unit/evaluation unit In order to be able to carry out precise flow measurements in the pipeline 2, a computer unit/evaluation unit must know where it is on the curve in FIG. 3 at all times. Depending on the bypass flow rate values, the speed of the component 8 and the operating mode, a control unit/evaluation unit and/or a computer program decides in which area of the curve the flow rate is now to be determined. Depending on the part of the curve where the bypass flow is located, functions such as inverse functions are applied to calculate the value of the flow in pipe 2. Inverse functions are, for example, with a test bench of a calibrated flow meter has determined. The test stand can record the relationship between the flow in the pipeline and the flow in the bypass for each operating mode.
  • the measuring system described can work bidirectionally. If in Figure 1, the flow in the pipe is from left to right, the flow in the bypass 6 is also from left to right, or the pressure on the left side of the rotating component 8 is higher than on the right side. If in Figure 1, the flow in the pipe is from right to left, the flow in the bypass 6 is also from right to left, or the pressure on the right side of the rotating component 8 is higher than on the left side. Bidirectionality also applies when the system is installed vertically or in another spatial direction
  • the rotational speed of component 8 is preferably measured.
  • a first pressure P1 is measured upstream of the component and a second pressure P2 downstream of the component for the pressure loss measurement, and a pressure difference DR between P1 and P2 is determined therefrom.
  • the pressure measurement described is a dynamic pressure measurement.
  • Sensor unit Flow and quantity measurement or pressure difference measurement

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

Abstract

L'invention concerne un procédé de mesure de débit et/ou de volume dans une canalisation conductrice de fluide avec des volumes d'écoulement largement fluctuants, ainsi qu'un dispositif pour la mise en œuvre du procédé. Le but de l'invention est donc de surmonter les inconvénients de l'état de la technique et d'obtenir un procédé économique, précis et à faibles pertes pour mesurer le débit et le volume dans des conduites conductrices de fluide avec des fluides largement fluctuants, et de fournir un agencement économique, précis et à faibles pertes pour mesurer le débit et le volume dans des conduites conductrices de fluide avec des fluides largement fluctuants. L'invention vise à résoudre ce problème au moyen d'un procédé de mesure de débit et/ou de volume dans une canalisation conductrice de fluide (2) avec des volumes d'écoulement largement fluctuants, la canalisation conductrice de fluide (2) présentant au moins un composant (8) qui provoque une perte de pression, le procédé comprenant les étapes de procédé suivantes : a. la réalisation d'une mesure de débit et/ou de volume dans une dérivation (6) qui est disposée au niveau de la canalisation conductrice de fluide (2) de sorte qu'une partie du fluide puisse contourner le composant (8), et/ou la détection de la perte de pression provoquée par le composant (8) dans la canalisation conductrice de fluide (2), b. la détermination d'un mode de fonctionnement du composant (8), c. la sélection d'une courbe caractéristique sur la base du mode de fonctionnement déterminé, d. la détermination du débit et/ou du volume dans la canalisation conductrice de fluide (2) sur la base du débit mesuré et/ou du volume mesuré dans la dérivation (6) et/ou au moyen de la perte de pression déterminée dans la canalisation conductrice de fluide (2) dans la courbe caractéristique sélectionnée.
PCT/EP2021/082676 2020-11-26 2021-11-23 Procédé de mesure de débit et/ou de volume dans une canalisation conductrice de fluide avec des volumes d'écoulement largement fluctuants, et agencement pour la mise en œuvre du procédé WO2022112245A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21820477.4A EP4251957A1 (fr) 2020-11-26 2021-11-23 Procédé de mesure de débit et/ou de volume dans une canalisation conductrice de fluide avec des volumes d'écoulement largement fluctuants, et agencement pour la mise en oeuvre du procédé

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020131298.9 2020-11-26
DE102020131298.9A DE102020131298A1 (de) 2020-11-26 2020-11-26 Verfahren zur Durchfluss- und/oder Mengenmessung in einer fluidführenden Rohrleitung mit stark schwankenden Durchflussmengen sowie eine Anordnung zur Durchführung des Verfahrens

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WO2022112245A1 true WO2022112245A1 (fr) 2022-06-02

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EP (1) EP4251957A1 (fr)
DE (1) DE102020131298A1 (fr)
WO (1) WO2022112245A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0403806A1 (fr) * 1989-06-21 1990-12-27 WILO GmbH Pompe centrifuge ou ventilateur
DE3929381C2 (de) 1989-09-05 1996-02-15 Meinecke Ag H Verbundwasserzähler
DE69224849T2 (de) * 1991-12-17 1998-10-22 Goeran Bahrton Durchflussmesser
DE102013008781B4 (de) 2013-05-23 2015-10-08 Diehl Metering Gmbh Ultraschalldurchflusszähler
DE102017001315A1 (de) * 2017-02-11 2018-08-16 Diehl Metering Gmbh Adaptierbarer Nebenzähler für einen Verbundzähler zur Durchflussbestimmung eines strömenden Mediums
EP3496263A1 (fr) * 2016-09-20 2019-06-12 Daikin Industries, Ltd. Système de génération d'énergie hydroélectrique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0403806A1 (fr) * 1989-06-21 1990-12-27 WILO GmbH Pompe centrifuge ou ventilateur
DE3929381C2 (de) 1989-09-05 1996-02-15 Meinecke Ag H Verbundwasserzähler
DE69224849T2 (de) * 1991-12-17 1998-10-22 Goeran Bahrton Durchflussmesser
DE102013008781B4 (de) 2013-05-23 2015-10-08 Diehl Metering Gmbh Ultraschalldurchflusszähler
EP3496263A1 (fr) * 2016-09-20 2019-06-12 Daikin Industries, Ltd. Système de génération d'énergie hydroélectrique
DE102017001315A1 (de) * 2017-02-11 2018-08-16 Diehl Metering Gmbh Adaptierbarer Nebenzähler für einen Verbundzähler zur Durchflussbestimmung eines strömenden Mediums

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Publication number Publication date
EP4251957A1 (fr) 2023-10-04
DE102020131298A1 (de) 2022-06-02

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