DE508511C - Procedure for measuring flowing liquids - Google Patents

Procedure for measuring flowing liquids

Info

Publication number
DE508511C
DE508511C DESCH82902D DESC082902D DE508511C DE 508511 C DE508511 C DE 508511C DE SCH82902 D DESCH82902 D DE SCH82902D DE SC082902 D DESC082902 D DE SC082902D DE 508511 C DE508511 C DE 508511C
Authority
DE
Germany
Prior art keywords
amount
procedure
flowing liquids
measuring
measuring flowing
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.)
Expired
Application number
DESCH82902D
Other languages
German (de)
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.)
Individual
Original Assignee
Individual
Publication date
Priority to DESCH82902D priority Critical patent/DE508511C/en
Application granted granted Critical
Publication of DE508511C publication Critical patent/DE508511C/en
Expired legal-status Critical Current

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Classifications

    • 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
    • G01F1/68—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 thermal effects
    • 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
    • G01F1/68—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 thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/6847—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow where sensing or heating elements are not disturbing the fluid flow, e.g. elements mounted outside the flow duct
    • 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
    • G01F1/68—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 thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/688—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element

Description

Verfahren zur Messung strömender Flüssigkeiten Es sind bereits kalorimetrische Methoden der Mengenmessung strömender Medien bekannt, bei denen also die von dem Medium abgegebene, seinem Gewicht proportionale Wärmemenge gemessen wird. Bei den be- kannten Verfahren sind zur Wärmemengenmessung besondere, die Meßanordnung komplizierende Einrichtungen erforderlich. Diese werden erfindungsgemäß dadurch vereinfacht, daß die Wärmemenge aus zwei Temperaturmessungen ermittelt wird, nämlich der Temperaturdifferenz des Mediums gegenüber Luft vor und hinter der Abkühlungsstrecke.Method for measuring flowing liquids Calorimetric methods of measuring the quantity of flowing media are already known, in which the amount of heat given off by the medium and proportional to its weight is measured. In the known processes the measurement arrangement complicating facilities are for heat quantity measurement special required. According to the invention, these are simplified in that the amount of heat is determined from two temperature measurements, namely the temperature difference between the medium and air upstream and downstream of the cooling section.

Die Messung kann im Hauptstrom oder in an sich bekannter Weise in einem Teilstrom, der dein Hauptstrom proportional ist, erfolgeil. Wenn das Verhältnis der beiden Ströme zueinander bekannt ist, genügt die Messung der kleinen Menge in der Teilstromleitung.The measurement can be carried out in the main stream or in a manner known per se in a partial flow that is proportional to your main flow. When the relationship of the two currents to each other is known, it is sufficient to measure the small amount in the partial flow line.

Die Abbildung zeigt das Verfahren bei der Messung einer Gasmenge im Teilstrom.The figure shows the procedure for measuring an amount of gas in the Partial flow.

L ist die Hauptleitung mit dem Durchmesser D, t die Teilstromleitung, die bei E pitotrohrartig, bei A gradlinig ausgebildet ist, mit dem Durchmesser d. Haupt- und Teilmenge stehen daher im Verhältnis An der Meßleitung t werden an zwei auseinanderliegenden Stellen, zwischen denen eine Abkühlungsfläche eingeschaltet ist, die Tenlperaturdifferenzen T°-t° und T,'-t' gemessen, was sich mit Thermoelementen oder Widerstandsthermometern o. dgl. leicht ausführen läßt. Dabei ist t° die Temperatur der Luft.L is the main line with the diameter D, t the partial flow line, which is shaped like a pitot tube at E and straight at A, with the diameter d. The main and subset are therefore in relation On the measuring line t, the temperature differences T ° -t ° and T, '- t' are measured at two points apart, between which a cooling surface is switched on, which can easily be carried out with thermocouples or resistance thermometers or the like. T ° is the temperature of the air.

Vorausgesetzt ist, daß T`-- t° ist, was bzi Gasen und Dämpfen fast immer der Fall ist, d.li. das Gas ist wärmer als die uingebend#-Luft.It is assumed that T`-- t ° , which is almost always the case for gases and vapors, i.e. the gas is warmer than the # air.

Die durch die M°ßieitung d strömende Gasmenge ergibt sich dann zu: Der Quotient läßt sich thermoelektrisch leicht bilden und auf die Elektrizitätszähler EN und ET übertragen, welche dann addierend die durchgeströmte Gasmenge angeben. Die elektrische Schaltung läßt sich aber auch so treffen,- daß die Gasmenge nur von einem Elektrizitätszähler angezeigt wird.The amount of gas flowing through the pipe d is then given by: The quotient can easily be formed thermoelectrically and transferred to the electricity meters EN and ET , which then add up the amount of gas that has flowed through. The electrical circuit can also be made in such a way - that the amount of gas is only displayed by an electricity meter.

Das Verfahren läßt sich in gleicher Weise für Flüssigkeiten verwenden.The method can be used in the same way for liquids.

Claims (1)

PATRNTANSPRL CII Verfahren zur Messung strömender Flüssigkeiten, bei dem die an einer Abkühlungsstrecke von der Flüssigkeit abgegebene Wärmemenge gemessen wird, dadurch gekennzeichnet, daß am Anfang und Ende der Abkühlungsstrecke die Temperaturdifferenzen mit der umgebenden Luft gemessen werden und durch Multiplikation des Quotienten aus der Summe und Differenz dieser Temperaturdifferenzen mit einer Konstanten die gesuchte Flüssigkeitsmenge ermittelt wird.PATRNTANSPRL CII Method of Measuring Flowing Liquids, at which measures the amount of heat given off by the liquid in a cooling section is, characterized in that the temperature differences at the beginning and end of the cooling section can be measured with the surrounding air and by multiplying the quotient from the sum and difference of these temperature differences with a constant die the amount of liquid sought is determined.
DESCH82902D Procedure for measuring flowing liquids Expired DE508511C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DESCH82902D DE508511C (en) Procedure for measuring flowing liquids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH82902D DE508511C (en) Procedure for measuring flowing liquids

Publications (1)

Publication Number Publication Date
DE508511C true DE508511C (en) 1930-09-29

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Family Applications (1)

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DESCH82902D Expired DE508511C (en) Procedure for measuring flowing liquids

Country Status (1)

Country Link
DE (1) DE508511C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2694928A (en) * 1948-07-29 1954-11-23 Mine Safety Appliances Co Electrical system for measuring the rate of motion of a fluid
US3314290A (en) * 1965-07-26 1967-04-18 Technion Res & Dev Foundation Shunt flow meter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2694928A (en) * 1948-07-29 1954-11-23 Mine Safety Appliances Co Electrical system for measuring the rate of motion of a fluid
US3314290A (en) * 1965-07-26 1967-04-18 Technion Res & Dev Foundation Shunt flow meter

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