ASTM E1530-06用保护的热流计技术评定材料的耐传热性能的测试标准_

Designation:E1530–06StandardTestMethodforEvaluatingtheResistancetoThermalTransmissionofMaterialsbytheGuardedHeatFlowMeterTechnique1ThisstandardisissuedunderthefixeddesignationE1530;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversasteady-statetechniqueforthedeterminationoftheresistancetothermaltransmission(ther-malresistance)ofmaterialsinthicknessesoflessthan25mm.Forhomogeneousopaquesolidspecimensofarepresentativethickness,thermalconductivitycanbedetermined(seeNote1).Thistestmethodisusefulforspecimenshavingathermalresistanceintherangefrom10to400310−4m2·K/W,whichcanbeobtainedfrommaterialsofthermalconductivityintheapproximaterangefrom0.1to30W/(m·K)overtheapproxi-matetemperaturerangefrom150to600K.Itcanbeusedoutsidetheserangeswithreducedaccuracyforthickerspeci-mensandforthermalconductivityvaluesupto60W/(m·K).NOTE1—Abodyisconsideredhomogeneouswhenthepropertytobemeasuredisfoundtobeindependentofspecimendimensions.1.2ThistestmethodissimilarinconcepttoTestMethodC518,butismodifiedtoaccommodatesmallertestspecimens,havingahigherthermalconductance.Inaddition,significantattentionhasbeenpaidtoensurethatthethermalresistanceofcontactingsurfacesisminimizedandreproducible.1.3ThevaluesstatedinSIunitsareconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.RelatedDocuments2.1ASTMStandards:2C518TestMethodforSteady-StateThermalTransmissionPropertiesbyMeansoftheHeatFlowMeterApparatusC1045PracticeforCalculatingThermalTransmissionPropertiesUnderSteady-StateConditionsE220TestMethodforCalibrationofThermocouplesByComparisonTechniquesE1142TerminologyRelatingtoThermophysicalPropertiesE1225TestMethodforThermalConductivityofSolidsbyMeansoftheGuarded-Comparative-LongitudinalHeatFlowTechniqueF104ClassificationSystemforNonmetallicGasketMate-rialsF433PracticeforEvaluatingThermalConductivityofGasketMaterials3.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.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·K)orBtu·in./(h·ft2·°F).3.2.2C—thermalconductance,W/m(2·K)orBtu/(h·ft2·°F).1ThistestmethodisunderthejurisdictionofASTMCommitteeE37onThermalMeasurementsandisthedirectresponsibilityofSubcommitteeE37.05onThermo-physicalProperties.CurrenteditionapprovedSept.1,2006.PublishedNovember2006.Originallyapprovedin1993.Lastpreviouseditionapprovedin2004asE1530–04.2ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.LicensedbyWEXtoAMERICANUNIVERSITYOFBEIRUT.Downloaded:8/31/20078:25:26AMsingle-userlicenseonly,copyingandnetworkingprohibited./3.2.3R—thermalresistance,m2·K/Worh·ft2·°F/Btu.3.2.4Dx—specimenthickness,mmorin.3.2.5A—specimencross-sectionalarea,m2orft2.3.2.6Q—heatflow,WorBtu/h.3.2.7f—heatfluxtransduceroutput,mV.3.2.8N—heatfluxtransducercalibrationconstant,W/(m2·mV)orBtu/(h·ft2·mV).3.2.9Nf—heatflux,W/m2orBtu/h·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(HFT)aresandwichedbetweentwoflatplatescontrolledatdifferenttemperatures,toproduceaheatflowthroughtheteststack.Areproducibleloadisappliedtotheteststackbypneumaticorothermeans,toensurethatthereisare