ASTM C1667-15
(Test Method)Standard Test Method for Using Heat Flow Meter Apparatus to Measure the Center-of-Panel Thermal Transmission Properties of Vacuum Insulation Panels
Standard Test Method for Using Heat Flow Meter Apparatus to Measure the Center-of-Panel Thermal Transmission Properties of Vacuum Insulation Panels
SIGNIFICANCE AND USE
5.1 Heat flow meter apparatus are being used to measure the center-of-panel portion of a vacuum insulation panel, which typically has a very high value of thermal resistivity (that is, equal to or greater than 90 m-K/W). As described in Specification C1484, the center-of-panel thermal resistivity is used, along with the panel geometry and barrier material thermal conductivity, to determine the effective thermal resistance of the evacuated panel.
5.2 Using a heat flow meter apparatus to measure the thermal resistivity of non-homogenous and high thermal resistance specimens is a non-standard application of the equipment, and shall only be performed by qualified personnel with understanding of heat transfer and error propagation. Familiarity with the configuration of both the apparatus and the vacuum insulation panel is necessary.
5.3 The center-of-panel thermal transmission properties of evacuated panels vary due to the composition of the materials of construction, mean temperature and temperature difference, and the prior history. The selection of representative values for the thermal transmission properties of an evacuated panel for a particular application must be based on a consideration of these factors and will not apply necessarily without modification to all service conditions.
SCOPE
1.1 This test method covers the measurement of steady-state thermal transmission through the center of a flat rectangular vacuum insulation panel using a heat flow meter apparatus.
1.2 Total heat transfer through the non-homogenous geometry of a vacuum insulation panel requires the determination of several factors, as discussed in Specification C1484. One of those factors is the center-of-panel thermal resistivity. The center-of-panel thermal resistivity is an approximation of the thermal resistivity of the core evacuated region.
1.3 This test method is based upon the technology of Test Method C518 but includes modifications for vacuum insulation panel applications as outlined in this test method.2
1.4 This test method shall be used in conjunction with Practice C1045 and Practice C1058.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 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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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C1667 − 15
Standard Test Method for
Using Heat Flow Meter Apparatus to Measure the Center-of-
Panel Thermal Transmission Properties of Vacuum
1
Insulation Panels
This standard is issued under the fixed designation C1667; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope Properties by Means of the Heat Flow Meter Apparatus
C740Practice for Evacuated Reflective Insulation In Cryo-
1.1 Thistestmethodcoversthemeasurementofsteady-state
genic Service
thermal transmission through the center of a flat rectangular
C1045Practice for Calculating Thermal Transmission Prop-
vacuum insulation panel using a heat flow meter apparatus.
erties Under Steady-State Conditions
1.2 Total heat transfer through the non-homogenous geom-
C1058Practice for Selecting Temperatures for Evaluating
etryofavacuuminsulationpanelrequiresthedeterminationof
and Reporting Thermal Properties of Thermal Insulation
several factors, as discussed in Specification C1484. One of
C1484Specification for Vacuum Insulation Panels
those factors is the center-of-panel thermal resistivity. The
E691Practice for Conducting an Interlaboratory Study to
center-of-panel thermal resistivity is an approximation of the
Determine the Precision of a Test Method
thermal resistivity of the core evacuated region.
E177Practice for Use of the Terms Precision and Bias in
ASTM Test Methods
1.3 This test method is based upon the technology of Test
MethodC518butincludesmodificationsforvacuuminsulation
2
panel applications as outlined in this test method. 3. Terminology
1.4 This test method shall be used in conjunction with
3.1 Definitions—TerminologyC168appliestotermsusedin
Practice C1045 and Practice C1058. this specification.
1.5 The values stated in SI units are to be regarded as
3.2 Definitions of Terms Specific to This Standard:
standard. No other units of measurement are included in this
3.2.1 center-of-panel—the location at the center of the
standard.
largest planar surface of the panel, equidistant from each pair
of opposite edges of that surface.
1.6 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.2.2 center-of-panel apparent thermal resistivity—the ther-
responsibility of the user of this standard to establish appro-
malperformanceofvacuuminsulationpanelsincludesanedge
priate safety and health practices and determine the applica-
effect due to heat flow through the barrier material and this
bility of regulatory limitations prior to use.
shunting of heat around the evacuated volume of the panel
becomes more prevalent with greater barrier thermal
2. Referenced Documents
conductivity, as shown in Fig. 1. For panels larger than a
3
2.1 ASTM Standards: minimum size (as described in AnnexA1), the center-of-panel
C168Terminology Relating to Thermal Insulation apparent thermal resistivity is a close approximation of the
C518Test Method for Steady-State Thermal Transmission intrinsic core thermal resistivity of the vacuum insulation
panel. The effective thermal performance of a panel will vary
with the size and shape of the panel.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC16onThermal
3.2.2.1 Discussion—Thermal resistivity, the reciprocal of
Insulation and is the direct responsibility of Subcommittee C16.30 on Thermal
apparent thermal conductivity, is used when discussing the
Measurement.
Current edition approved Oct. 1, 2015. Published October 2015. Originally center-of-panel thermal behavior.
approved in 2007. Last previous edition approved in 2009 as C1667–09. DOI:
3.2.3 core—the material placed within the evacuated vol-
10.1520/C1667-15.
2
ume of a vacuum insulation panel. This material may perform
AllreferencestoparticularsectionsofTestMethodC518withinthisdocument
refer to the 2010 edition of Test Method C518.
any or all of the following functions: prevent panel collapse
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
duetoatmosphericpressure,reduceradiationheattransfer,and
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
reduce gas-phase conduction.The apparent thermal conductiv-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ity of the core, or λ , is defined as the apparent thermal
core
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C1667 − 09 C1667 − 15
Standard Test Method for
Using Heat Flow Meter Apparatus to Measure the Center-of-
Panel Thermal Resistivity Transmission Properties of
1
Vacuum Insulation Panels
This standard is issued under the fixed designation C1667; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the measurement of steady-state thermal transmission through the center of a flat rectangular
vacuum insulation panel using a heat flow meter apparatus.
1.2 Total heat transfer through the non-homogenous geometry of a vacuum insulation panel requires the determination of
several factors, as discussed in Specification C1484. One of those factors is the center-of-panel thermal resistivity. The
center-of-panel thermal resistivity is an approximation of the thermal resistivity of the core evacuated region.
1.3 This test method is based upon the technology of Test Method C518 but includes modifications for vacuum insulation panel
2
applications as outlined in this test method.
1.4 This test method shall be used in conjunction with Practice C1045 and Practice C1058.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 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.
2. Referenced Documents
3
2.1 ASTM Standards:
C168 Terminology Relating to Thermal Insulation
C518 Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus
C740 Practice for Evacuated Reflective Insulation In Cryogenic Service
C1045 Practice for Calculating Thermal Transmission Properties Under Steady-State Conditions
C1058 Practice for Selecting Temperatures for Evaluating and Reporting Thermal Properties of Thermal Insulation
C1484 Specification for Vacuum Insulation Panels
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
3. Terminology
3.1 Definitions—Terminology C168 applies to terms used in this specification.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 center-of-panel—the location at the center of the largest planar surface of the panel, equidistant from each pair of opposite
edges of that surface.
3.2.2 center-of-panel apparent thermal resistivity—the thermal performance of vacuum insulation panels includes an edge effect
due to heat flow through the barrier material and this shunting of heat around the evacuated volume of the panel becomes more
1
This test method is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.30 on Thermal
Measurement.
Current edition approved April 1, 2009Oct. 1, 2015. Published May 2009October 2015. Originally approved in 2007. Last previous edition approved in 20072009 as
C1667–07.–09. DOI: 10.1520/C1667-09.10.1520/C1667-15.
2
All references to particular sections of Test Method C518 within this document refer to the 20042010 edition of Test Method C518.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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C1667 − 15
prevalent with greater barrier thermal conductivity, as shown in Fig. 1. For panels larger than a minimum size (as described in
Annex A1), the center-of-panel apparent thermal resistivity is a close approximation of the intrinsic core thermal resistivity of the
vacuum insulation panel. The effective thermal performance of a panel will vary with the size and shape of the panel.
3.2.2.1 Discussion—
Thermal resistivity, the reciprocal of apparent thermal conductivity, is used when discussing the center-of-panel thermal behavior.
3.2.3 core—the material placed within the evacuated volum
...
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