BS EN 12939-2001 建筑材料和产品的热性能.用护热板和热流计测定热阻.高和中热阻的厚产品

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【英文标准名称】:Thermalperformanceofbuildingmaterialsandproducts-Determinationofthermalresistancebymeansofguardedhotplateandheatflowmetermethods-Thickproductsofhighandmediumthermalresistance
【原文标准名称】:建筑材料和产品的热性能.用护热板和热流计测定热阻.高和中热阻的厚产品
【标准号】:BSEN12939-2001
【标准状态】:现行
【国别】:英国
【发布日期】:2001-01-15
【实施或试行日期】:2001-01-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:测量技术;描述;测定;实验室试验;测量仪器;材料;套管;施工材料;热阻;建筑;测量板;热防护;厚度;热传递系数;检验设备;热力学性质;热传递;试验设备;导热性;热流;数学计算;测量设备;试样;试样;温差;预处理;热流密度;试验;板材;仪器;测量;热量测量仪表;板式装置
【英文主题词】:Boards;Bushings;Checkingequipment;Construction;Constructionmaterials;Descriptions;Determination;Heatflow;Heatflowdensity;Heattransfer;Heat-measuringinstruments;Instruments;Laboratorytesting;Materials;Mathematicalcalculations;Measurement;Measuringequipment;Measuringinstruments;Measuringplates;Measuringtechniques;Plateapparatus;Pretreatment;Samples;Temperaturedifferences;Testequipment;Testspecimens;Testing;Thermalconductivity;Thermalprotection;Thermalresistance;Thermaltransmissioncoefficient;Thermaltransmittance;Thermodynamicproperties;Thickness
【摘要】:Thisstandardgivestheprocedurestodeterminethethermalresistanceofproductsthethicknessesofwhichexceedthemaximumthicknessforguardedhotplateorheatflowmeterapparatus.Inanycasemostoftheproceduresdescribedinthisstandardrequireapparatusthatallowstestsonspecimensupto100mmthick.Thisstandardgivesguidelinestoassesstherelevanceofthethicknesseffect,i.e.toestablishwhetherthethermalresistanceofathickproductcanorcannotbecalculatedasthesumofthethermalresistancesofslicescutfromtheproduct,theseguidelinescomplementtheindicationsgiveninISO8302:1991ontheguardedhotplateapparatus.Thisstandarddescribestestingconditionswhichpreventtheonsetofconvection,whichcouldtakeplaceinsomeproductsundertheconsideredtemperaturedifferencesandthicknesses.
【中国标准分类号】:Q04
【国际标准分类号】:91_100_60
【页数】:36P.;A4
【正文语种】:英语