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FR2009392A1 - Measurement of the thermal conductivity of gases and - liquids - Google Patents

Measurement of the thermal conductivity of gases and - liquids

Info

Publication number
FR2009392A1
FR2009392A1 FR6916966A FR6916966A FR2009392A1 FR 2009392 A1 FR2009392 A1 FR 2009392A1 FR 6916966 A FR6916966 A FR 6916966A FR 6916966 A FR6916966 A FR 6916966A FR 2009392 A1 FR2009392 A1 FR 2009392A1
Authority
FR
France
Prior art keywords
wire
liquids
gases
measurement
during
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.)
Pending
Application number
FR6916966A
Other languages
French (fr)
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.)
Siemens Corp
Original Assignee
Siemens Corp
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 Siemens Corp filed Critical Siemens Corp
Publication of FR2009392A1 publication Critical patent/FR2009392A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
    • G01N27/18—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by changes in the thermal conductivity of a surrounding material to be tested

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biochemistry (AREA)
  • Electrochemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Measuring Volume Flow (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

Measurement of the thermal conductivity of gases and liquids.. Is independent of the ambient temperature and of the speed of flow of the gases or liquids. A wire is stretched in a chamber, through which the fluids flow, and is heated by electric current pulses applied to the ends of the wire; during each interval between two current pulses, during which the wire is not heated, the cooling of the wire, produced by the surrounding thermal conductors, is measured and recorded. The wire is fed with square-wave voltage pulsed by the intermediary of a pair of rectifiers of staggered polarity which are mounted in series with resistances determining two different current densities. A constant resistance is mounted in series with the wire to eliminate residual temperature errors. The measurement is made without waiting for the wire to attain its equillibrium temperature but the process is operated with frequencies of up to several hundred Hz. A commutator is included which is controlled by the frequency of the repitition of the current pulses through the wire, so as to be closed during each measuring period and open during each heating period.
FR6916966A 1968-05-27 1969-05-23 Measurement of the thermal conductivity of gases and - liquids Pending FR2009392A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH781468A CH491375A (en) 1968-05-27 1968-05-27 Method for measuring the thermal conductivity of gases and liquids

Publications (1)

Publication Number Publication Date
FR2009392A1 true FR2009392A1 (en) 1970-02-06

Family

ID=4330867

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6916966A Pending FR2009392A1 (en) 1968-05-27 1969-05-23 Measurement of the thermal conductivity of gases and - liquids

Country Status (4)

Country Link
JP (1) JPS5113030B1 (en)
CH (1) CH491375A (en)
DE (1) DE1925970A1 (en)
FR (1) FR2009392A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2374638A1 (en) * 1976-12-20 1978-07-13 Potter Bronson M FLUID DETECTION DEVICE
EP0070801A1 (en) * 1981-07-13 1983-01-26 Battelle Memorial Institute Method and device for the determination of at least one instantaneous parameter of a fluid by means of heat exchange between a probe immersed in the fluid
WO1984002003A1 (en) * 1982-11-18 1984-05-24 Collins Hans Juergen Method and device to determine wether a limit value, expressed as a percentage of a liquid portion contained in a liquid mixture and having a lower evaporation temperature, has been reached or exceeded
USD790991S1 (en) * 2015-12-21 2017-07-04 Turlen Holding Sa Watch

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1123402A (en) * 1978-04-17 1982-05-11 Richard E. Widdowson Pressure operated hydraulic control valve
DE3105740C2 (en) * 1981-02-17 1983-07-14 Dornier System Gmbh, 7990 Friedrichshafen Method and device for examining the filling gas of insulating glass units
DE3122642C2 (en) * 1981-06-06 1986-04-24 Collins, Hans-Jürgen, Prof. Dr.-Ing., 3300 Braunschweig Method for determining the proportion of solid and / or liquid and / or gaseous substances in a mixture or stratification of these substances
JPS5934984U (en) * 1982-08-31 1984-03-05 三和テッキ株式会社 Spring guide for check valve device
US5177696A (en) * 1989-12-28 1993-01-05 Honeywell Inc. Method of determination of gas properties at reference conditions
JPH05107118A (en) * 1990-04-12 1993-04-27 De Beers Ind Diamond Div Ltd Method of measuring characteristic of medium
DE4408836C1 (en) * 1994-03-16 1995-05-04 Felten & Guilleaume Energie Sensor for measuring specific thermal resistance
DE19636673C2 (en) * 1996-09-10 1998-09-17 Barbara Dipl Phys Pause Method and device for measuring thermophysical parameters of plate-shaped samples, in particular textile fabrics, under different measuring conditions
DE102010047159B4 (en) * 2010-09-30 2015-03-05 Dräger Medical GmbH Apparatus and method for measuring the concentration of carbon dioxide in a gas sample
CN114353985B (en) * 2021-12-27 2025-05-16 中国航发沈阳发动机研究所 A wall temperature measurement correction method for contact temperature sensor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2374638A1 (en) * 1976-12-20 1978-07-13 Potter Bronson M FLUID DETECTION DEVICE
EP0070801A1 (en) * 1981-07-13 1983-01-26 Battelle Memorial Institute Method and device for the determination of at least one instantaneous parameter of a fluid by means of heat exchange between a probe immersed in the fluid
WO1984002003A1 (en) * 1982-11-18 1984-05-24 Collins Hans Juergen Method and device to determine wether a limit value, expressed as a percentage of a liquid portion contained in a liquid mixture and having a lower evaporation temperature, has been reached or exceeded
USD790991S1 (en) * 2015-12-21 2017-07-04 Turlen Holding Sa Watch

Also Published As

Publication number Publication date
JPS5113030B1 (en) 1976-04-24
CH491375A (en) 1970-05-31
DE1925970A1 (en) 1969-12-04

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