EVITherM EVITherM Bruno HAY 16/09/2003 Task 4.1 : Best Practice Guides Compile information on...
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Transcript of EVITherM EVITherM Bruno HAY 16/09/2003 Task 4.1 : Best Practice Guides Compile information on...
EVITherM
EVITherM Bruno HAY 16/09/2003
Task 4.1 : Best Practice Guides
Compile information on measurement methods and
laboratories
Direct the Evitherm user quickly to this information
A user of Evitherm could find on our website :
Information on measurement techniques of thermophysical properties
Information on method to calibrate his own equipment
a help to choose :
- the measurement technique suitable to his problem
- a list of laboratories using this relevant technique
1
Scheme for guiding Evitherm userto measurement method or laboratories
1
Scheme for guiding Evitherm userto measurement method or laboratories
2
Search information on measurement and calibration techniques, laboratories and equipment suppliers
Choice of a measurement technique and/or laboratories
EVITherM Bruno HAY 16/09/2003
1
2
Scheme for guiding Evitherm userto measurement method or laboratories
Physical properties
Thermal diffusivity
EVITherM Bruno HAY 16/09/2003
Specific heat
Thermal conductivity
Emissivity
1 Information on measurement and calibration techniques, laboratories and equipment suppliers
…Thermal expansion
3
Scheme for guiding Evitherm userto measurement method or laboratories
Measurement techniques
Guarded hot plate
EVITherM Bruno HAY 16/09/2003
Hot wire method
Flash method
Axial heat flow method
Heat flow meter
Radial flow method Comparative method
…
(P)
(P)
(P)
(S)
(S)
(P)
(P)
P : Primary or absolute method / S : Secondary method
1 Information on measurement and calibration techniques, laboratories and equipment suppliers
4
Scheme for guiding Evitherm userto measurement method or laboratories
Flash method
EVITherM Bruno HAY 16/09/2003
Laboratories
Calibration
Measurement
Apparatus suppliers
1 Information on measurement and calibration techniques, laboratories and equipment suppliers
5
Scheme for guiding Evitherm userto measurement method or laboratories
Flash method – Measurement / Calibration
- Principle of measurement (short description)
- Advantages / Disadvantages
- Range of applicability
EVITherM Bruno HAY 16/09/2003
Guides Standards Databases
1 Information on measurement and calibration techniques, laboratories and equipment suppliers
6
Scheme for guiding Evitherm userto measurement method or laboratories
Laboratories and measurement providers using the flash method
Name Contact Website Country
LNE Bruno Hay www.lne.fr France PTB IKE NPL …
EVITherM Bruno HAY 16/09/2003
12345
1 Information on measurement and calibration techniques, laboratories and equipment suppliers
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Scheme for guiding Evitherm userto measurement method or laboratories
EVITherM Bruno HAY 16/09/2003
Technique Temperature Range Further information Laser flash technique 20 °C - 1500 °C Uncertainty : 3 % to 5 %
Atmosphere : vacuum, inert gas Cylindrical specimens
Diameter : 10 mm Thickness : from 1 to 4 mm
LABORATOIRE NATIONAL D’ESSAIS
Adress Contact Qualification
29, avenue Roger Hennequin Bruno HAY COFRAC 78197 Trappes Cedex [email protected] NMI France Tel: 33 1 30 69 12 20 Fax: 33 1 30 69 12 34
1 Information on measurement and calibration techniques, laboratories and equipment suppliers
8
Scheme for guiding Evitherm userto measurement method or laboratories
Flash method - Suppliers of apparatus
Name Website Country
Netzsch Gerätebau GmbH www.ngb.netzsch.com Germany
…
…
…
EVITherM Bruno HAY 16/09/2003
1
2
3
4
1 Information on measurement and calibration techniques, laboratories and equipment suppliers
9
Scheme for guiding Evitherm userto measurement method or laboratories
EVITherM Bruno HAY 16/09/2003
Netzsch Gerätebau GmbH
Adress
NETZSCH Gerätebau GmbH Tel +49 9287/881-0 Wittelsbacherstraße 42 Fax +49 9287/881-144 D-95100 Selb/Bayern E-mail:
1 Information on measurement and calibration techniques, laboratories and equipment suppliers
10
Scheme for guiding Evitherm userto measurement method or laboratories
2 Choice of a measurement technique and/or laboratories
EVITherM Bruno HAY 16/09/2003
Physical properties
Thermal diffusivity
Specific heat
Thermal conductivity
Emissivity
…Thermal expansion
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Scheme for guiding Evitherm userto measurement method or laboratories
2 Choice of a measurement technique and/or laboratories
Type of material
Insulating material
EVITherM Bruno HAY 16/09/2003
Ceramics / Glasses
Polymers
Metals / Alloys
… …
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Scheme for guiding Evitherm userto measurement method or laboratories
2 Choice of a measurement technique and/or laboratories
Characteristics of the material
EVITherM Bruno HAY 16/09/2003
Liquid
State
Composite
Homogeneity
Porous With coating
Semi-transparent
Transparency
OpaqueSolid Homogeneous
Thin film
Furthercharacteristics
Moisture
…
Powder
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Scheme for guiding Evitherm userto measurement method or laboratories
2 Choice of a measurement technique and/or laboratories
Temperature range
Below RT
EVITherM Bruno HAY 16/09/2003
500 °C - 1500 °C Above 1500 °C
Above 1500 °C500 °C - 1500 °CBelow RT
Minimum
Maximum
Uncertainty
< 2% < 10 % < 15 %< 5%
RT - 500 °C
RT - 500 °C
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Scheme for guiding Evitherm userto measurement method or laboratories
EVITherM Bruno HAY 16/09/2003
2 Choice of a measurement technique and/or laboratories
Summary of the requirements
Physical property Material StateThermal conductivity Metals / Alloys Solid,
homogeneous, opaque
Temperature range Uncertainty
RT to 1500 °C < 5 %
M
1
2
3
Results of the request
Technique Sample Geometry
Laser Flash Technique Cylindrical specimens - Flat and parallel faces Diameter 5 mm to 20 mm - Thickness : 1 mm to 5 mm
Hot Wire Technique Pair of square specimens with grooves - Flat and parallel faces L: 100 mm to 250 mm - W : 30 mm to 100 mm - T : 20 mm to 50 mm
Guarded Hot Plate Pair of cylindrical or square specimens - Flat and parallel faces Diameter or square 100 mm to 500 mm - Thickness : 20 mm to 50 mm
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Scheme for guiding Evitherm userto measurement method or laboratories
2 Choice of a measurement technique and/or laboratories
Geographical situation
EVITherM Bruno HAY 16/09/2003
All countries
Austria
England
France
Germany
…Italy
France
Qualification
All laboratories
Certified labs.
NMI’s
Qualified labs.
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Scheme for guiding Evitherm userto measurement method or laboratories
EVITherM Bruno HAY 16/09/2003
Technique Temperature Range Further information Laser flash technique 20 °C - 1500 °C Uncertainty : 3 % to 5 %
Atmosphere : vacuum, inert gas Cylindrical specimens
Diameter : 10 mm Thickness : from 1 to 4 mm
LABORATOIRE NATIONAL D’ESSAIS
Adress Contact Qualification
29, avenue Roger Hennequin Bruno HAY COFRAC 78197 Trappes Cedex [email protected] NMI France Tel: 33 1 30 69 12 20 Fax: 33 1 30 69 12 34
2 Choice of a measurement technique and/or laboratories
17
Selection of measurement methods
Selection of measurement methods
To propose to a Evitherm user the measurement method suitable to his requirements, we should :
- Fix selection criteria (sample geometry, temperature range, material …)
- Quantify these criteria for each measurement methods
- Define a method allowing to find the suitable method from the criteria
EVITherM Bruno HAY 16/09/2003
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Selection of measurement methods
EVITherM Bruno HAY 16/09/2003
Table 1 Thermal Conductivity – Measurement MethodsMeasurement
MethodMain type
of materialsTemperature
range Sample geometry Measurement
rangeLaboratoriesAtm.
Flashmethod
[20 - 2000°C]Cylindrical sample
diameter : 5 to 20 mmthickness : 1 to 5 mm
[1-500 W/mK]Inert gasvacuum
air
ARCS, LNE NPL…
OpaqueHomogeneous
Guarded hotplate
OpaqueSemi-transp.
HomogeneousComposites
[20 - 500 °C]2 cylindrical or square samplesflat and parallel faces diameter : 100 to 500 mmThickness : 20 mm to 50 mm
< 1 W/mK air IKE, LNE NPL, PTB…
Hot wiremethod
Refractorymaterials
including powder[20 - 1500 °C]
2 square samples with groovesflat and parallel faces
Length : 100 mm to 250 mmWidth : 30 mm to 100 mm
Thickness : 20 mm to 50 mm
< 5 W/mK air IKE, NPL
PTB…
TemperatureWave method
OpaqueHomogeneous
[20 - 2000 °C]Cylindrical sample
Diameter : 5 mm to 10 mmThickness : 1 mm to 5 mm
[1-500 W/mK]Inert gasvacuum
air IKE
Four ProbeTechnique
ElectricConductingmaterials
[50 - 1200 °C]Cylindrical sampleDiameter : 5.5 mm,
Length : 90 mm [1-500 W/mK] IKE
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Selection of measurement methods
EVITherM Bruno HAY 16/09/2003
Table 2 Thermal Conductivity – Laboratories
Labs MeasurementMethods
Temp. Range (°C)
Sample geometry
Country
LNE
Cylindrical samplediameter : 10 mm
thickness : 1 to 5 mm
Guarded hotplate
Solid materials (alloys, ceramics
polymers)20
Pair of square samplesflat and parallel facessquare : 500 mmThickness : 20 to 50 mm
Laser flashmethod
Main typeof materials
Solid materials (thermal insulation
products)
min max
1500
-10 60
Uncert. of measur.
5 %to 6 %
0.5 % to 1
%
France
Qualif.
COFRAC NMI
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Selection of measurement methods
Selection of measurement methods
EVITherM Bruno HAY 16/09/2003
1 - Evitherm user expresses his requirements
2 - Coherences between the requirements and the characteristics of each method are checked
3 - The most relevant methods are proposed
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Selection of measurement methods
Selection of measurement methods
EVITherM Bruno HAY 16/09/2003
User requirementsState of material
Flash method
Guarded hot plate
Hot wire method
Solid Homog. Opaque
Temperature
1500 °C 1-5 W/mK
Total
1 111 1 5
1 011 0 3
1 011 1 4
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