BS ISO 15469-2004 日光的空间分布.CIE标准普通天

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【英文标准名称】:Spatialdistributionofdaylight-CIEstandardgeneralsky
【原文标准名称】:日光的空间分布.CIE标准普通天
【标准号】:BSISO15469-2004
【标准状态】:现行
【国别】:英国
【发布日期】:2004-04-05
【实施或试行日期】:2004-04-05
【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】:符号;标准值;照明工程;风化;日光表;三维;天空;分配;亮度;自然采光;太阳辐射;照明系统;阳光;云;额定值;光
【英文主题词】:Clouds;Distribution;Illuminationengineering;Light;Lightingsystems;Luminance;Naturallighting;Ratings;Referencevalues;Skies;Skylightdiagram;Solarradiation;Sunlighting;Symbols;Three-dimensional;Weathering
【摘要】:ThisStandarddefinesasetofoutdoordaylightconditionslinkingsunlightandskylightfortheoreticalandpracticalpurposes.Theluminancedistributionsgivenhavethefollowingcharacteristics:i.Theyaresymmetricalaboutthesolarmeridianandarefunctionsoftheangulardistance,Zs,betweenthesunandthezenith.ii.Theyaredefinedbysmoothcontinuousfunctions.Suchdistributionsaretypicalofcloudlessskiesandofthosewherethecloudcoverishomogeneous.Theyprovideanapproximationtoskiesofbrokencloudthatissufficientlyaccurateformanypracticaldaylightcalculationpurposes.iii.Therelativeluminanceatanypointintheskydependsontheangle,
,betweenthatskyelementandthesun,andontheangle,Z,betweentheskyelementandthezenith.Itisgivenintermsoftwofunctions:therelativescatteringindicatrix,f(
),andtheluminancegradationbetweenhorizonandzenith,(Z).
【中国标准分类号】:F12
【国际标准分类号】:17_180_20
【页数】:12P;A4
【正文语种】:英语