【英文标准名称】:Glassinbuilding.Determinationofthermaltransmittance(Uvalue).Guardedhotplatemethod
【原文标准名称】:建筑玻璃.热传递系数(U值)的测定.保护热板法
【标准号】:BSEN674-2011
【标准状态】:现行
【国别】:英国
【发布日期】:2011-07-31
【实施或试行日期】:2011-07-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Construction;Definitions;Determination;Glass;Glassforbuildingpurposes;Glazing;Heattransmission;Measurement;Measuringtechniques;Multipleglazing;Plateapparatus;Testequipment;Thermalinsulation;Thermalprotection;Thermalresistance;Thermaltransmissioncoefficient;Thermaltransmittance;U-values;Windowglass;Windows
【摘要】:ThisEuropeanStandardspecifiesameasurementmethodtodeterminethethermaltransmittanceofglazingwithflatandparallelsurfaces.Structuredsurfaces,e.g.patternedglass,canbeconsideredtobeflat.ThisEuropeanStandardappliestomultipleglazingwithouterpaneswhicharenottransparenttofarinfraredradiation,whichisthecaseforsodalimesilicateglassproducts,borosilicateglassandglassceramics.Internalelementsmaybefarinfraredtransparent.TheprocedurespecifiedinthisEuropeanStandarddeterminestheUvalue1)(thermaltransmittance)inthecentralareaofglazing.Theedgeeffects,duetothethermalbridgethroughthespacerofaninsulatingglassunitorthroughthewindowframearenotincluded.Furthermoreenergytransferduetosolarradiationisnottakenintoaccount.TheprocedurespecifiedinthisEuropeanStandardshouldgenerallyonlybeconsideredwhenthecalculationmethoddetailedinEN673isinappropriateorunsuitable.ThedocumentforthecalculationoftheoverallUvalueofwindows,doorsandshutters(see[3])givesnormativereferencetotheUvalueevaluatedfortheglazingcomponentsaccordingtothisstandard.Averticalpositionoftheglazingisspecified.Uvaluesevaluatedaccordingtothepresentstandardareusedforproductcomparisonaswellasforotherpurposes,inparticularforpredicting:?heatlossthroughglazing;?conductionheatgainsinsummer;?condensationonglazingsurfaces;?theeffectsoftheabsorbedsolarradiationindeterminingthesolarfactor(see[1]).Referenceshouldbemadeto[4],[5],orotherEuropeanStandardsdealingwithheatlosscalculationsfortheapplicationofglazingUvaluesdeterminedbythisstandard.Thedeterminationofthethermaltransmittanceisperformedforconditionswhichcorrespondtotheaveragesituationforglazinginpractice.
【中国标准分类号】:Q33
【国际标准分类号】:81_040_20
【页数】:16P.;A4
【正文语种】:英语