Standard Test Method for Evaluating the Resistance to Thermal Transmission of Materials by the Guarded Heat Flow Meter Technique

SCOPE
1.1 This test method covers a steady-state technique for the determination of the resistance to thermal transmission (thermal resistance) of materials in thicknesses of less than 25 mm. For homogeneous opaque solid specimens of a representative thickness, thermal conductivity can be determined (see Note 0). This test method is useful for specimens having a thermal resistance in the range from 10 to 400 104 m2K/W, which can be obtained from materials of thermal conductivity in the approximate range from 0.1 to 30 W/(mK) over the approximate temperature range from 150 to 600 K. It can be used outside these ranges with reduced accuracy for thicker specimens and for thermal conductivity values up to 60 W/(mK).Note 0
A body is considered homogeneous when the property to be measured is found to be independent of specimen dimensions.
1.2 This test method is similar in concept to Test Method C 518, but is modified to accommodate smaller test specimens, having a higher thermal conductance. In addition, significant attention has been paid to ensure that the thermal resistance of contacting surfaces is minimized and reproducible.
1.3 The values stated in SI units are considered standard.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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ASTM E1530-04 - Standard Test Method for Evaluating the Resistance to Thermal Transmission of Materials by the Guarded Heat Flow Meter Technique
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E 1530 – 04
Standard Test Method for
Evaluating the Resistance to Thermal Transmission of
1
Materials by the Guarded Heat Flow Meter Technique
This standard is issued under the fixed designation E1530; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope C 1045 Practice for Calculating Thermal Transmission
Properties Under Steady-State Test Conditions
1.1 This test method covers a steady-state technique for the
E220 Method for Calibration of Thermocouples by Com-
determination of the resistance to thermal transmission (ther-
parison Techniques
mal resistance) of materials in thicknesses of less than 25 mm.
E1142 TerminologyRelatingtoThermophysicalProperties
For homogeneous opaque solid specimens of a representative
E1225 Test Method for Thermal Conductivity of Solids by
thickness, thermal conductivity can be determined (see Note
Means of the Guarded-Comparative-Longitudinal Heat
1). This test method is useful for specimens having a thermal
−4 2
Flow Technique
resistance in the range from 10 to 400 3 10 m ·K/W, which
F104 Classification System for Nonmetallic Gasket Mate-
can be obtained from materials of thermal conductivity in the
rials
approximate range from 0.1 to 30 W/(m·K) over the approxi-
F433 Practice for Evaluating Thermal Conductivity of
mate temperature range from 150 to 600 K. It can be used
Gasket Materials
outside these ranges with reduced accuracy for thicker speci-
mens and for thermal conductivity values up to 60 W/(m·K).
3. Terminology
NOTE 1—A body is considered homogeneous when the property to be
3.1 Definitions of Terms Specific to This Standard:
measured is found to be independent of specimen dimensions.
3.1.1 heatfluxtransducer(HFT)—adevicethatproducesan
1.2 This test method is similar in concept to Test Method
electrical output that is a function of the heat flux, in a
C518,butismodifiedtoaccommodatesmallertestspecimens,
predefined and reproducible manner.
having a higher thermal conductance. In addition, significant
3.1.2 thermal conductance (C)—the time rate of heat flux
attention has been paid to ensure that the thermal resistance of
through a unit area of a body induced by unit temperature
contacting surfaces is minimized and reproducible.
difference between the body surfaces.
1.3 The values stated in SI units are considered standard.
3.1.2.1 average temperature of a surface—the area-
1.4 This standard does not purport to address all of the
weighted mean temperature of that surface.
safety concerns, if any, associated with its use. It is the
3.1.2.2 average (mean) temperature of a specimen (disc
responsibility of the user of this standard to establish appro-
shaped)—themeanvalueoftheupperandlowerfacetempera-
priate safety and health practices and determine the applica-
tures.
bility of regulatory limitations prior to use.
3.1.3 thermal conductivity (l)—(of a solid material)—the
time rate of heat flow, under steady conditions, through unit
2. Related Documents
area,perunittemperaturegradientinthedirectionperpendicu-
2
2.1 ASTM Standards:
lar to the area:
C518 Test Method for Steady-State Heat Flux Measure-
3.1.3.1 apparent thermal conductivity—When other modes
ments and Thermal Transmission Properties by Means of
of heat transfer through a material are present in addition to
the Heat Flow Meter Apparatus
conduction, the results of the measurements performed in
accordance with this test method will represent the apparent or
effective thermal conductivity for the material tested.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeE37onThermal
3.1.4 thermal resistance (R)—the reciprocal of thermal
Measurements and is the direct responsibility of Subcommittee E37.05 onThermo-
conductance.
physical Properties.
3.2 Symbols:
Current edition approved May 1, 2004. Published June 2004. Originally
approved in 1993. Last previous edition approved in 1999 as E1530–99.
3.2.1 l—thermal conductivity, W/(m·K) or Btu·in./
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 2
(h·ft ·°F).
contact ASTM Customer service at service@astm.org. For Annual Book of ASTM
2 2
3.2.2 C—thermal conductance, W/m( ·K) or Btu/(h·ft ·°F).
Standards volume information, refer to the standard’s Document Summary page on
2 2
the ASTM website. 3.2.3 R—thermal resistance, m ·K/W or h·ft ·°F/Btu.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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E1530–04
3.2.4 Dx—specimen thickness, mm or in. together with the electrical output of the HFT. This output
2 2
3.2.5 A—
...

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