GB1246670A - Improvements in or relating to methods of and apparatus for measuring flow of liquids - Google Patents

Improvements in or relating to methods of and apparatus for measuring flow of liquids

Info

Publication number
GB1246670A
GB1246670A GB4322268A GB4322268A GB1246670A GB 1246670 A GB1246670 A GB 1246670A GB 4322268 A GB4322268 A GB 4322268A GB 4322268 A GB4322268 A GB 4322268A GB 1246670 A GB1246670 A GB 1246670A
Authority
GB
United Kingdom
Prior art keywords
heating
tube
fluid
flow
cooling
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
GB4322268A
Inventor
Douglas Harold Lucas
Raymond Clifford Wratten
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.)
Central Electricity Generating Board
Original Assignee
Central Electricity Generating Board
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 Central Electricity Generating Board filed Critical Central Electricity Generating Board
Priority to GB4322268A priority Critical patent/GB1246670A/en
Publication of GB1246670A publication Critical patent/GB1246670A/en
Expired legal-status Critical Current

Links

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
    • 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
    • G01F1/6888—Thermoelectric elements, e.g. thermocouples, thermopiles
    • 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
    • G01F1/696—Circuits therefor, e.g. constant-current flow 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
    • G01F1/68—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
    • G01F1/696—Circuits therefor, e.g. constant-current flow meters
    • G01F1/698—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters
    • G01F1/6986—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters with pulsed heating, e.g. dynamic methods

Landscapes

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

Abstract

1,246,670. Measuring fluid-flow electrically. CENTRAL ELECTRICITY GENERATING BOARD. Dec. 11, 1969 [Sept. 11, 1968], No.43222/68. Heading G1N. The flow-rate of a fluid through a tube is deter-, mined by measuring its cooling or heating effect on a temperature sensing probe 10 held against the tube and connected to a portable indicator unit 13 by a flexible connection 12. In an embodiment a thermocouple probe is held by a magnetic clamp against a locally pre-heated spot and signals 17 representing the temperature difference from a reference temperature are applied to a control unit together with timing signals, the rate of cooling being measured, either over a predetermined temperature drop, or over a predetermined time, and indicated at 21. The localized heating may be effected by radiant electric heater, induction heating, gas burner or propane torch. The heater may be mounted alongside the thermocouple in the probe, and energized at a standard rate during the measuring period. Alternatively, cooling instead of heating may be used, for example by a liquid spray or application of a cold mass. The heating may also be effected by causing a fluid at known temperature to flow through the tube. The method may be used for checking boiler tubes for blockages.
GB4322268A 1968-09-11 1968-09-11 Improvements in or relating to methods of and apparatus for measuring flow of liquids Expired GB1246670A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4322268A GB1246670A (en) 1968-09-11 1968-09-11 Improvements in or relating to methods of and apparatus for measuring flow of liquids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4322268A GB1246670A (en) 1968-09-11 1968-09-11 Improvements in or relating to methods of and apparatus for measuring flow of liquids

Publications (1)

Publication Number Publication Date
GB1246670A true GB1246670A (en) 1971-09-15

Family

ID=10427806

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4322268A Expired GB1246670A (en) 1968-09-11 1968-09-11 Improvements in or relating to methods of and apparatus for measuring flow of liquids

Country Status (1)

Country Link
GB (1) GB1246670A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4848147A (en) * 1987-07-10 1989-07-18 Bailey James L Thermal transient anemometer
WO2011058095A2 (en) 2009-11-11 2011-05-19 Ably As A method and apparatus for the measurement of flow in gas or oil pipes
US10508966B2 (en) 2015-02-05 2019-12-17 Homeserve Plc Water flow analysis
US10704979B2 (en) 2015-01-07 2020-07-07 Homeserve Plc Flow detection device

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4848147A (en) * 1987-07-10 1989-07-18 Bailey James L Thermal transient anemometer
WO2011058095A2 (en) 2009-11-11 2011-05-19 Ably As A method and apparatus for the measurement of flow in gas or oil pipes
WO2011058095A3 (en) * 2009-11-11 2011-07-21 Ably As A method and apparatus for the measurement of flow in gas or oil pipes
US20120279316A1 (en) * 2009-11-11 2012-11-08 Gaarder Paal Even Method and Apparatus for the Measurement of Flow in Gas or Oil Pipes
US20130276549A1 (en) * 2009-11-11 2013-10-24 Paal Even Gaarder Method and Apparatus for the Measurement of Flow in Gas or Oil Pipes
US8910530B2 (en) * 2009-11-11 2014-12-16 Thomson Reuters (Markets) Norge As Method and apparatus for the measurement of flow in gas or oil pipes
US10330512B2 (en) * 2009-11-11 2019-06-25 Ralugnis As Method and apparatus for the measurement of flow in gas or oil pipes
US10704979B2 (en) 2015-01-07 2020-07-07 Homeserve Plc Flow detection device
US10942080B2 (en) 2015-01-07 2021-03-09 Homeserve Plc Fluid flow detection apparatus
US11209333B2 (en) 2015-01-07 2021-12-28 Homeserve Plc Flow detection device
US10508966B2 (en) 2015-02-05 2019-12-17 Homeserve Plc Water flow analysis

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