EP2786107A2 - Procédé de calorimétrie au moyen d'un débitmètre à ultrasons - Google Patents

Procédé de calorimétrie au moyen d'un débitmètre à ultrasons

Info

Publication number
EP2786107A2
EP2786107A2 EP12781062.0A EP12781062A EP2786107A2 EP 2786107 A2 EP2786107 A2 EP 2786107A2 EP 12781062 A EP12781062 A EP 12781062A EP 2786107 A2 EP2786107 A2 EP 2786107A2
Authority
EP
European Patent Office
Prior art keywords
fluid
temperature
determined
ultrasonic
heat exchanger
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.)
Withdrawn
Application number
EP12781062.0A
Other languages
German (de)
English (en)
Inventor
Achim Wiest
Oliver Brumberg
Andreas Berger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Endress and Hauser Flowtec AG
Original Assignee
Endress and Hauser Flowtec AG
Flowtec AG
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 Endress and Hauser Flowtec AG, Flowtec AG filed Critical Endress and Hauser Flowtec AG
Publication of EP2786107A2 publication Critical patent/EP2786107A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • G01K13/02—Thermometers specially adapted for specific purposes for measuring temperature of moving fluids or granular materials capable of flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K17/00—Measuring quantity of heat
    • G01K17/06—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device
    • G01K17/08—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device based upon measurement of temperature difference or of a temperature
    • G01K17/10—Measuring quantity of heat conveyed by flowing media, e.g. in heating systems e.g. the quantity of heat in a transporting medium, delivered to or consumed in an expenditure device based upon measurement of temperature difference or of a temperature between an inlet and an outlet point, combined with measurement of rate of flow of the medium if such, by integration during a certain time-interval
    • 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
    • G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/662—Constructional details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/22—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of acoustic effects
    • G01K11/24—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of acoustic effects of the velocity of propagation of sound
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
    • 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
    • G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
    • 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
    • G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/667—Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters
    • G01F1/668—Compensating or correcting for variations in velocity of sound

Definitions

  • the present invention relates to a method and a device for
  • Measuring the heat quantity wherein the flow rate of a fluid, whose chemical composition is known, is determined by the lumen of a pipeline with an ultrasonic flowmeter which operates according to the transit time difference principle, and wherein the temperature of the fluid downstream and upstream of a heat exchanger is determined.
  • the flow of a measuring medium is determined by a pipeline and by means of the temperature sensor the values of the temperature of the fluid before and after the heat exchanger.
  • a measuring medium usually a fluid
  • Temperature difference is determined by the heat exchanger transferred heat or energy.
  • Ultrasonic flowmeters are widely used in process and process
  • ultrasonic pulses are sent at a certain angle to the pipe axis both with and against the flow.
  • the runtime difference can be used to determine the flow velocity and, with a known diameter of the pipe section, the volume flow rate.
  • ultrasonic waves are generated or received with the help of so-called ultrasonic transducers.
  • ultrasonic transducers in the pipe wall of the relevant Pipe section firmly attached.
  • Clamp-on ultrasonic flowmeters are also available. In these systems, the
  • Ultrasonic transducer from outside the measuring tube pressed against the pipe wall.
  • a big advantage of clamp-on ultrasonic flow measuring systems is that they do not touch the measuring medium and on an already existing pipeline
  • the ultrasonic transducers normally consist of an electromechanical transducer element, e.g. a piezoelectric element, and a coupling layer.
  • the ultrasonic waves are generated as acoustic signals and passed over the coupling layer to the pipe wall and passed from there into the liquid, in clamp-on systems, or they are coupled in inline systems via the coupling layer in the measuring medium.
  • the coupling layer is also called rare membrane.
  • a further coupling layer may be arranged, a so-called adaptation layer.
  • Adaptation layer assumes the function of transmission of the
  • the object of the invention is to propose a method for measuring the amount of heat, which is simple and inexpensive to perform.
  • FIG. 2 shows a device according to the invention for measuring the amount of heat in a second embodiment
  • FIG. 3 shows a device according to the invention for measuring the amount of heat in a third embodiment
  • FIG. 4 shows a device according to the invention for measuring the amount of heat in a fourth embodiment
  • Fig. 5 shows the course of the speed of sound in water applied over the
  • a device according to the invention for measuring the heat quantity is shown in a first embodiment.
  • the device comprises an ultrasonic flow meter 1, which operates in particular according to the transit time difference principle, for determining the flow of a fluid through a pipe 2, which ultrasonic flow meter 1 in the flow direction of the fluid at a first location on a first side of a heat exchanger 5 on or in of the
  • Pipe 2 is arranged.
  • a fluid is a gas or a liquid.
  • the ultrasonic flowmeter 1 is further developed to a clamp-on ultrasonic flowmeter, which at the surface of the
  • Pipe 2 is arranged.
  • the device according to the invention comprises a first temperature sensor 3 for determining a value of the temperature of the fluid in the pipeline, which is arranged at a second location on the other, second side heat exchanger 5. If the ultrasonic flowmeter 1 is located upstream of the heat exchanger 5, the first temperature sensor 3 is arranged downstream of the heat exchanger 5 on or in the pipeline 2. Is that the other way around Ultrasonic flow meter 1 downstream of the heat exchanger 5 on or arranged in the pipe 2, the first temperature sensor 3 is upstream of the heat exchanger 5.
  • the ultrasonic flow meter 1 is inventively designed to determine the speed of sound of the fluid in the pipe 2.
  • the device comprises a means, in particular a further, second temperature sensor 4, which is suitable for determining a value of the temperature outside the lumen of the pipeline 2 at the first location on the first side of the heat exchanger 5.
  • a heat exchanger 5 can be both heat sink and heat source. For example, heat is transferred from a heating system, such as a gas or oil burner or an electric heater to the fluid, or the fluid is removed through the heat exchanger heat, for example, in a radiator of the heating system or in an air conditioner. Further examples of heat exchangers are heat exchangers in the process industry or
  • Heat engines or heat pumps The device according to the invention finds the execution of the following
  • Flow of the fluid whose chemical composition is known determined by the lumen of the pipe 2.
  • values of the temperature of the fluid upstream and downstream of the heat exchanger 5, ie before and after the heat exchanger are determined. This is done according to the invention in that the sound velocity of the fluid with the ultrasonic flowmeter and a second value of the temperature outside the lumen of the pipeline 2 are determined for a first determination of a first value of the fluid at the first location on the first side of the heat exchanger ,
  • the first value of the temperature outside the lumen of the pipeline is determined, for example, with a second temperature sensor 4 arranged on the pipeline surface, in particular a resistance thermometer determined, for example, in a coupling element of an ultrasonic transducer of the ultrasonic flowmeter by transit time measurement.
  • a second temperature sensor 4 arranged on the pipeline surface, in particular a resistance thermometer determined, for example, in a coupling element of an ultrasonic transducer of the ultrasonic flowmeter by transit time measurement.
  • Ultrasonic signal from the ultrasonic transducer element to the reflection surface and back can be easily determine the temperature of the coupling element.
  • the second value of the temperature at the second location on the second side of the heat exchanger is determined, for example, with an ultrasonic transducer as an ultrasonic temperature sensor, which determines the speed of sound of the fluid and optionally determines a third value of the temperature outside the pipeline according to, for example, the above-mentioned ways or for determining the second value of the temperature at the second location on the second side of the heat exchanger serves a temperature sensor contacting the fluid, in particular a resistance thermometer, as illustrated in FIG. 2.
  • the device according to the invention is designed in each case accordingly, so has the corresponding temperature sensor.
  • Fig. 2 differs from Fig. 1 only in the manner of determining the value of the temperature at the second location.
  • a known dependence of the speed of sound on the temperature of the material, here the fluid is used. If the speed of sound of the fluid additionally depends on the pressure in the fluid, according to one embodiment of the invention, the pressure in the fluid is additionally determined and used to determine the temperature of the fluid.
  • Fig. 5 shows the dependence of the speed of sound in water of the
  • the invention requires a sensitive and therefore relatively expensive
  • Another advantage of the invention is the fact that the value of the flow can be corrected by means of the value of the temperature of the second temperature sensor and thus its accuracy is increased.
  • Another advantage of the determination of the temperature of the fluid by means of ultrasound is the integral determination of the temperature over the entire sound path and not only at the point of a temperature sensor. Thus, you can
  • the device according to the invention has, for example, a measuring transducer 6 in which, for the known fluid, curves of the speed of sound as a function of the temperature and optionally of the pressure and / or further
  • thermodynamic variables such as the state of aggregation, are stored and which transmitter 6 is suitable, from the value of the temperature of the fluid at the appropriate location, here
  • the device according to the invention has at least one pressure transducer 7 in order to measure the pressure, in particular the absolute pressure, in the fluid.
  • the invention comprises the
  • the heat quantity calculator can itself be part of the transmitter.
  • This embodiment of the invention is particularly advantageous for measuring the heat quantity of gases, by a simple measurement of the energy of the gas before and after the heat exchanger by means of the pressure transducer.
  • the invention relates to a temperature sensor to a flow meter, which is adapted to determine the temperature of the fluid, for example, an ultrasonic flowmeter, a thermal flowmeter or a Coriolis flowmeter.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Measuring Volume Flow (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

L'invention concerne le procédé et le dispositif de calorimétrie. Ledit procédé consiste : à déterminer avec un débitmètre à ultrasons qui fonctionne selon le principe de la différence de temps de propagation le débit d'un fluide dont la composition chimique est connue à travers le lumen d'une conduite tubulaire; et à déterminer la température du fluide en amont et en aval d'un échangeur de chaleur, la première détermination de la température du fluide étant effectuée en déterminant la vitesse du son du fluide avec le débitmètre à ultrasons et une température à l'extérieur du lumen de la conduite tubulaire.
EP12781062.0A 2011-11-28 2012-10-24 Procédé de calorimétrie au moyen d'un débitmètre à ultrasons Withdrawn EP2786107A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011087215A DE102011087215A1 (de) 2011-11-28 2011-11-28 Verfahren zur Wärmemengenmessung mit einem Ultraschall-Durchflussmessgerät
PCT/EP2012/070998 WO2013079264A2 (fr) 2011-11-28 2012-10-24 Procédé de calorimétrie au moyen d'un débitmètre à ultrasons

Publications (1)

Publication Number Publication Date
EP2786107A2 true EP2786107A2 (fr) 2014-10-08

Family

ID=47137684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12781062.0A Withdrawn EP2786107A2 (fr) 2011-11-28 2012-10-24 Procédé de calorimétrie au moyen d'un débitmètre à ultrasons

Country Status (4)

Country Link
US (1) US20150043612A1 (fr)
EP (1) EP2786107A2 (fr)
DE (1) DE102011087215A1 (fr)
WO (1) WO2013079264A2 (fr)

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GB2482004A (en) * 2010-07-14 2012-01-18 Influx Measurements Ltd Monitoring apparatus
DE102012112750A1 (de) * 2012-12-20 2014-06-26 Endress + Hauser Wetzer Gmbh + Co. Kg Messeinrichtung zur Bestimmung einer Wärmemenge
GB2520978A (en) * 2013-12-05 2015-06-10 Zonealone Ltd A domestic hot water installation
DE102015107750A1 (de) 2015-05-18 2016-11-24 Endress + Hauser Flowtec Ag Meßsystem zum Messen wenigstens eines Parameters eines Fluids
GB2556904A (en) * 2016-11-24 2018-06-13 Univ Warwick Ultrasonic clamp-on flow meter
SE540630C2 (en) * 2016-12-30 2018-10-09 3Eflow Ab A method and apparatus for flow measurement in a fluid distribution system having a number of fluid tap units
DE102017010727A1 (de) * 2017-11-21 2019-05-23 Diehl Metering Gmbh Messeinrichtung zur Ermittlung eines Drucks in einem Messvolumen
DE102017129561B3 (de) 2017-12-12 2019-04-25 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Vorrichtung und Verfahren zum Messen einer Heizleistung in einem Kühlsystem
DE102018003671B4 (de) * 2018-05-05 2026-03-26 Diehl Metering Gmbh Fluidzähler
NO349145B1 (en) * 2019-05-08 2025-10-13 Scanwell Tech As Determination of temperature and temperature profile in a wellbore
CN112763008A (zh) * 2020-12-04 2021-05-07 武汉雅洛诗商贸有限公司 气体流量测量站

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Also Published As

Publication number Publication date
WO2013079264A2 (fr) 2013-06-06
WO2013079264A3 (fr) 2014-01-09
US20150043612A1 (en) 2015-02-12
DE102011087215A1 (de) 2013-05-29

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