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【英文标准名称】:StandardTestMethodforThermalPerformanceofBuildingMaterialsandEnvelopeAssembliesbyMeansofaHotBoxApparatus
【原文标准名称】:用高温实验室法测定建筑材料和包装组件热性能的标准试验方法
【标准号】:ASTMC1363-2011
【标准状态】:现行
【国别】:
【发布日期】:2011
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:C16.30
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:建筑装配;建筑材料;热轴;试验方法;热性能
【英文主题词】:buildingassemblies;buildingmaterials;hotbox;testmethod;thermalproperties
【摘要】:Aneedexistsforaccuratedataonheattransferthroughinsulatedstructuresatrepresentativetestconditions.Thedataareneededtojudgecompliancewithspecificationsandregulations,fordesignguidance,forresearchevaluationsoftheeffectofchangesinmaterialsorconstructions,andforverificationof,orusein,simulationmodels.OtherASTMstandardssuchasTestMethodsC177andC518providedataonhomogeneousspecimensboundedbytemperaturecontrolledflatimperviousplates.Thehotboxtestmethodismoresuitableforprovidingsuchdataforlargebuildingelements,usuallyofabuilt-uporcompositenature,whichareexposedtotemperature-controlledaironbothsides.Fortheresultstoberepresentativeofabuildingconstruction,onlyrepresentativesectionsshallbetested.Thetestspecimenshallduplicatetheframinggeometry,materialcompositionandinstallationpractice,andorientationofconstruction(seeSection7).Thistestmethoddoesnotestablishtestconditions,specimenconfiguration,ordataacquisitiondetailsbutleavesthesechoicestobemadeinamannerconsistentwiththespecificapplicationbeingconsidered.Dataobtainedbytheuseofthistestmethodisrepresentativeofthespecimenperformanceonlyfortheconditionsofthetest.Itisunlikelythatthetestconditionswillexactlyduplicatein-useconditionsandtheuserofthetestresultsmustbecautionedofpossiblesignificantdifferences.Forexample,insomespecimens,especiallythosecontainingemptycavitiesorcavitiesopentoonesurface,theoverallresistanceortransmittancewilldependuponthetemperaturedifferenceacrossthetestspecimenduetointernalconvection.Detailedheatflowanalysisshallprecedetheuseofthehotboxapparatusforlarge,complexstructures.Astructurethatcontainscavityspacesbetweenadjacentsurfaces,forexample,anatticsectionincludingaceilingwithslopingroof,maybedifficulttotestproperly.Considerationmustbegiventotheeffectsofspecimensize,naturalairmovement,ventilationeffects,radiativeeffects,andbafflesattheguard/meterinterfacewhendesigningthetestspecimen.Forverticalspecimenswithairspacesthatsignificantlyaffectthermalperformance,themeteringchamberdimensionshallmatchtheeffectiveconstructionheight.Ifthisisnotpossible,horizontalconvectionbarriersshallbeinstalledinsidethespecimenaircavitiesatthemeteringchamberboundariestopreventairexchangebetweenthemeteringandguardingareas.Theoperatorshallnoteinthereportanyuseofconvectionbarriers.Thereportshallcontainawarningstatingthattheuseofthebarriersmightmodifytheheattransferthroughthesystemcausingsignificanterrors.Forceilingtestswithlowdensityinsulations,theminimumlateraldimensionofthespecimenshallbeatleastseveraltimesthedimensionoftheexpectedconvectioncells.Sincethistestmethodisusedtodeterminethetotalheatflowthroughthetestareademarcatedbythemeteringbox,itispossibletodeterminetheheatflowthroughabuildingelementsmallerthanthetestarea,suchasawindoworrepresentativeareaofapanelunit,iftheparallelheatflowthroughtheremainingsurroundingareaisindependentlydetermined.SeeAnnexA8forthegeneralmethod.Discussionofallspecialconditionsusedduringthetestshallbeincludedinthetestreport(seeSection13).1.1Thistestmethodestablishestheprinciplesforthedesignofahotboxapparatusandtheminimumrequirementsforthedeterminationofthesteadystatethermalperformanceofbuildingassemblieswhenexposedtocontrolledlaboratoryconditions.Thismethodisalsousedto......
【中国标准分类号】:
【国际标准分类号】:91_120_10
【页数】:44P.;A4
【正文语种】: