摘要
线性菲涅耳聚光反射装置(LFR)是每一行反射镜面(镜元)均实时跟踪太阳光的装置,可将太阳入射光反射至固定位置的线性吸热器上,LER上每一镜元的入射角、反射角和跟踪倾角均时刻变化,使得系统相邻镜元之间的阴影与遮挡分析变得非常复杂。利用光学投影得到LFR镜场中任一镜元在太阳矢量方向上的影长与斜长。为了得到相邻镜元之间不存在阴影与遮挡影响的条件,分析影长与斜长之间的关系,例如最小间距等。最后给出在具体算例情况下的镜元间距分析和镜元布置与有效辐照度的关系。
In a linear Fresnel reflector（LFR）,every mirror row was used to track the sunlight in real time and to reflect the sunlight to fixed linear receiver.Therefore,incidence angle and reflected angle of the sunlight and every mirror row tracking tilt angle vary throughout the year.This makes the analysis of shading and blocking between adjacent mirror rows very complex.The calculating formulae of sun shadow length and skew length of LFR mirror row were obtained by the projective method.In order to get the relation of shading and blocking,shadow length and skew length were analysed,for example the minimum mirror row spacing and etc..Finally,a examples of mirror spacing analysis and relationship of mirror elements arraryment and effective irradiance was given.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2010年第11期3276-3282,共7页
Acta Optica Sinica
基金
国家973计划(2010CB227103)资助课题
关键词
线性菲涅耳聚光装置
矢量法
阴影与遮挡
影长与斜长
镜元间距
linear Fresnel reflector（LFR）
vector algebra
shading and blocking
sun shadow length and skew length
mirror row spacing
