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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】:ISO15469-2004
【标准状态】:现行
【国别】:国际
【发布日期】:2004-02
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO
【标准类型】:()
【标准水平】:()
【中文主题词】:照明工程;风化;天窗图;标准值;符号;光;额定值;云;亮度;自然采光;照明系统;阳光;太阳辐射;天空;三维;分配
【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】:A47
【国际标准分类号】:17_180_20
【页数】:7P;A4
【正文语种】:英语