ASTM-E1530-2011

Designation:E1530–11StandardTestMethodforEvaluatingtheResistancetoThermalTransmissionofMaterialsbytheGuardedHeatFlowMeterTechnique1ThisstandardisissuedunderthefixeddesignationE1530;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversasteady-statetechniqueforthedeterminationoftheresistancetothermaltransmission(ther-malresistance)ofmaterialsofthicknesseslessthan25mm.Forhomogeneousopaquesolidspecimensofarepresentativethickness,thermalconductivitycanbedetermined(seeNote1).Thistestmethodisusefulforspecimenshavingathermalresistanceintherangefrom10to400310-4m2·K·W-1,whichcanbeobtainedfrommaterialsofthermalconductivityintheapproximaterangefrom0.1to30W·m-1·K-1overtheapproxi-matetemperaturerangefrom150to600K.Itcanbeusedoutsidetheserangeswithreducedaccuracyforthickerspeci-mensandforthermalconductivityvaluesupto60W·m-1·K-1.NOTE1—Abodyisconsideredhomogeneouswhenthepropertytobemeasuredisfoundtobeindependentofspecimendimensions.1.2ThistestmethodissimilarinconcepttoTestMethodC518,butismodifiedtoaccommodatesmallertestspecimens,havingahigherthermalconductance.Inaddition,significantattentionhasbeenpaidtoensurethatthethermalresistanceofcontactingsurfacesisminimizedandreproducible.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Theadditionalvaluesaremathematicalconversionstoinch-poundunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.RelatedDocuments2.1ASTMStandards:2C518TestMethodforSteady-StateThermalTransmissionPropertiesbyMeansoftheHeatFlowMeterApparatusC1045PracticeforCalculatingThermalTransmissionProp-ertiesUnderSteady-StateConditionsE220TestMethodforCalibrationofThermocouplesByComparisonTechniquesE1142TerminologyRelatingtoThermophysicalPropertiesE1225TestMethodforThermalConductivityofSolidsbyMeansoftheGuarded-Comparative-LongitudinalHeatFlowTechniqueF104ClassificationSystemforNonmetallicGasketMate-rialsF433PracticeforEvaluatingThermalConductivityofGas-ketMaterials3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1heatfluxtransducer(HFT)—adevicethatproducesanelectricaloutputthatisafunctionoftheheatflux,inapredefinedandreproduciblemanner.3.1.2thermalconductance(C)—thetimerateofheatfluxthroughaunitareaofabodyinducedbyunittemperaturedifferencebetweenthebodysurfaces.3.1.2.1averagetemperatureofasurface—thearea-weightedmeantemperatureofthatsurface.3.1.2.2average(mean)temperatureofaspecimen(discshaped)—themeanvalueoftheupperandlowerfacetempera-tures.1ThistestmethodisunderthejurisdictionofASTMCommitteeE37onThermalMeasurementsandisthedirectresponsibilityofSubcommitteeE37.05onThermo-physicalProperties.CurrenteditionapprovedAug.15,2011.PublishedSeptember2011.Originallyapprovedin1993.Lastpreviouseditionapprovedin2006asE1530–06.DOI:10.1520/E1530-11.2ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.CopyrightASTMInternationalProvidedbyIHSunderlicensewithASTMNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---3.1.3thermalconductivity(l)—(ofasolidmaterial)—thetimerateofheatflow,understeadyconditions,throughunitarea,perunittemperaturegradientinthedirectionperpendicu-lartothearea:3.1.3.1apparentthermalconductivity—whenothermodesofheattransferthroughamaterialarepresentinadditiontoconduction,theresultsofthemeasurementsperformedinaccordancewiththistestmethodwillrepresenttheapparentoreffectivethermalconductivityforthematerialtested.3.1.4thermalresistance(R)—thereciprocalofthermalconductance.3.2Symbols:3.2.1l—thermalconductivity,W·m-1·K-1orBtu·in.·h-1·ft-2·°F-1.3.2.2C—thermalconductance,W·m-2·K-1orBtu·h-1·ft-2·°F-1.3.2.3R—thermalresistance,m2·K·W-1orh·ft2·°F·Btu-1.3.2.4Dx—specimenthickness,mmorin.3.2.5A—specimencross-sectionalarea,m2orft2.3.2.6Q—heatflow,WorBtu·h-1.3.2.7f—heatfluxtransduceroutput,mV.3.2.8N—heatfluxtransducercalibrationconstant,W·m-2·mV-1orBtu·h-1·ft-2·mV-1.3.2.9Nf—heatflux,W·m2orBtu·h-1·ft2.3.2.10DT—temperaturedifference,°Cor°F.3.2.11Tg—temperatureofguardheater,°Cor°F.3.2.12Tu—temperatureofupperheater,°Cor°F.3.2.13Tl—temperatureoflowerheater,°Cor°F.3.2.14T1—temperatureofonesurfaceofthespecimen,°Cor°F.3.2.15T2—temperatureoftheothersurfaceofthespeci-men,°Cor°F.3.2.16Tm—meantemperatureofthespecimen,°Cor°F.3.2.17s—unknownspecimen.3.2.18r—knowncalibrationorreferencespecimen.3.2.19o—contacts.4.SummaryofTestMethod4.1Aspecimenandaheatfluxtransducer