点、线耦合聚焦塔式太阳能线菲定日镜追踪角时空变换特性研究  

DETAILED STUDY ON SUN-TRACKING CHARACTERISTIC OF A POINT-LINE-COUPLING BEAM-DOWN CONCENTRATING SOLAR TOWER WITH LINEAR FRESNEL HELIOSTATS

作　　者：马玄 代彦军[1] 李显[1] 王如竹[1] Ma Xuan;Dai Yanjun;Li Xian;Wang Ruzhu(Institute of Refrigeration and Cryogenics,Key Laboratory for Power Machinery and Engineering of M.O.E Shanghai Jiao Tong University,Shanghai 200240,Chin)

机构地区：[1]上海交通大学机械与动力工程学院太阳能发电与制冷教育部工程研究中心

出　　处：《太阳能学报》2018年第7期1833-1840,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51276112)

摘　　要：介绍一种新型的点、线耦合菲涅尔二次反射塔式太阳能聚光系统,推导该系统定日镜追踪太阳光线的理论追踪角（俯仰角βh和滚转角βm）公式,利用理论追踪角公式计算上海地区一年中4个典型日系统线菲定日镜追踪角的时空变换特性。以夏至日定日镜H3为例,详细计算其子镜与中心子镜的理论俯仰角差Δβ（h,id）和理论滚转角差Δβ（m,id）。该文的目的是通过研究菲涅尔二次反射塔式太阳能聚光系统定日镜理论追踪角的时空变换特性,确定系统定日子镜追踪太阳的实际滚转角差,并利用Soltrace软件模拟系统在夏至日实际追踪和理论追踪时的光学效率,差值最大为8.20%,最小为0.28%。A novel point-line-coupling solar tower system,which consists of three linear Fresnel heliostats（H）andcorresponding beam-down concentrators（BC）is introduced and studied in this paper.Sun-tracking angle formulas ofheliostats of this system are derived and attained,namely heliostats tracking angle βh and sub-mirror tracking angleβm,thus obtaining the tracking angle characters of heliostat H1,H2 and H3 on the representative days of spring equinox,summer solstice,autumn equinox and winter solstice entire year in Shanghai.Actually we take H3 as anexample to fully calculate frame tracking angle difference Δβ（h,id） and sub-mirror tracking angle difference Δβ（m,id）between actual sub-mirrors and the center of heliostat frame.The objective of this work is to identify the actual sub-mirrors＇ tracking angles including frame tracking angle difference Δβ（h,id） and sub-mirror tracking angle difference Δβ（m,id） by investigating heliostats＇ ideal tracking angles of this point-line-coupling beam-down solar tower system.We also simulatethe efficiencies of the systems under ideal sun-tracking angles and actual sun-tracking angles,where the maximum andminimum value of difference is respectively 8.20% and 0.28%,denoting the actual set is reasonable.

关 键 词：点线耦合菲涅尔二次反射塔式太阳能聚光系统 理论俯仰角公式和理论滚转角公式 理论俯仰角差和理论滚转角差 实际滚转角差 

分 类 号：TK519[动力工程及工程热物理—热能工程]