【英文标准名称】:StandardPracticeforDeterminingThermalResistanceofBuildingEnvelopeComponentsfromtheIn-SituData
【原文标准名称】:通过现场数据测定建筑包覆物的热阻的标准实施规程
【标准号】:ASTMC1155-1995(2007)
【标准状态】:现行
【国别】:
【发布日期】:1995
【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】:(Practice)
【标准水平】:()
【中文主题词】:热阻;门窗头线条板;元部件
【英文主题词】:calculation;heatflow;heatfluxtransducers;HFT;in-situ;meantemperature;measurement;thermalresistance
【摘要】:1.1Thispracticecovershowtoobtainandusedatafromin-situmeasurementoftemperaturesandheatfluxesonbuildingenvelopestocomputethermalresistance.ThermalresistanceisdefinedinTerminologyC168intermsofsteady-stateconditionsonly.Thispracticeprovidesanestimateofthatvaluefortherangeoftemperaturesencounteredduringthemeasurementoftemperaturesandheatflux.1.2Thispracticepresentstwospecifictechniques,thesummationtechniqueandthesumofleastsquarestechnique,andpermitstheuseofothertechniquesthathavebeenproperlyvalidated.ThispracticeprovidesameansforestimatingthemeantemperatureofthebuildingcomponentforestimatingthedependenceofmeasuredR-valueontemperatureforthesummationtechnique.Thesumofleastsquarestechniqueproducesacalculationofthermalresistancewhichisafunctionofmeantemperature.1.3Eachthermalresistancecalculationappliestoasubsectionofthebuildingenvelopecomponentthatwasinstrumented.Eachcalculationappliestotemperatureconditionssimilartothoseofthemeasurement.Thecalculationofthermalresistancefromin-situdatarepresentsin-serviceconditions.However,fieldmeasurementsoftemperatureandheatfluxmaynotachievetheaccuracyobtainableinlaboratoryapparatuses.1.4Thispracticepermitscalculationofthermalresistanceonportionsofabuildingenvelopethathavebeenproperlyinstrumentedwithtemperatureandheatfluxsensinginstruments.Thesizeofsensorsandconstructionofthebuildingcomponentdeterminehowmanysensorsshallbeusedandwheretheyshouldbeplaced.Becauseofthevarietyofpossibleconstructiontypes,sensorplacementandsubsequentdataanalysisrequirethedemonstratedgoodjudgmentoftheuser.1.5Eachcalculationpertainsonlytoadefinedsubsectionofthebuildingenvelope.Combiningresultsfromdifferentsubsectionstocharacterizeoverallthermalresistanceisbeyondthescopeofthispractice.1.6Thispracticesetscriteriaforthedata-collectiontechniquesnecessaryforthecalculationofthermalproperties(seeNote1).Anyvalidtechniquemayprovidethedataforthispractice,buttheresultsofthispracticeshallnotbeconsideredtobefromanASTMstandard,unlesstheinstrumentationtechniqueitselfisanASTMstandard.Note18212;CurrentlyonlyPracticeC1046canprovidethedataforthispractice.Italsooffersguidanceonhowtoplacesensorsinamannerrepresentativeofmorethanjusttheinstrumentedportionsofthebuildingcomponents.1.7Thispracticepertainstolight-throughmedium-weightconstructionasdefinedbyexamplein5.8.Thecalculationsapplytotherangeofindoorandoutdoortemperaturesobserved.1.8ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.9Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P31
【国际标准分类号】:91_120_10
【页数】:8P.;A4
【正文语种】: