作者:标准资料网 时间:2024-05-19 05:54:57   浏览:9109   来源:标准资料网

【英文标准名称】:Glassinbuilding-Determinationoftheemissivity
【原文标准名称】:建筑物玻璃.辐射能力的测定
【标准号】:BSEN12898-2001
【标准状态】:现行
【国别】:英国
【发布日期】:2001-04-15
【实施或试行日期】:2001-04-15
【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】:门窗玻璃;热传递系数;玻璃;表面性质;施工材料;热防护;发射
【英文主题词】:
【摘要】:ThisEuropeanStandardspecifiesaprocedurefordeterminingtheemissivityatroomtemperatureofthesurfacesofglassandcoatedglass.Theemissivityisnecessaryfortakingintoaccountheattransferbyradiationfromsurfacesatthestandardtemperatureof283KinthedeterminationoftheUvalueandofthetotalsolartransmittanceofglazingaccordingto[1]to[5],Theprocedure,beingbasedonspectrophotometricregularreflectancemeasurementsatnearnormalincidenceonnon-infraredtransparentmaterials,isnotapplicabletoglazingcomponentswithatleastoneofthefollowingcharacteristics:a)withroughorstructuredsurfaceswheretheincidentradiationisdiffuselyreflected;b)withcurvedsurfaceswheretheincidentradiationisregularlyreflectedatanglesunsuitabletoreachthedetectorwhileusingregularreflectanceaccessories;c)infraredtransparent.However,itmaybeappliedwithcautiontoanyglazingcomponentprovideditssurfacesareflatandnon-diffusing(see3.6)anditisnon-infraredtransparent(see3.7).
【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