三运动复合线性菲涅耳反射式太阳聚光系统的性能研究  

Performance of Linear Fresnel Reflector System Combined Three-Movement

作　　者：戴静[1,2] 郑宏飞[1] 冯朝卿[1,3] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]中海阳能源集团股份有限公司,北京102200 [3]内蒙古工业大学能源与动力工程学院,内蒙古呼和浩特010051

出　　处：《北京理工大学学报》2016年第5期464-469,479,共7页Transactions of Beijing Institute of Technology

基　　金：国家"八六三"计划项目(2013AA102407-2)

摘　　要：为改善线性菲涅耳反射式聚光系统的余弦损失对系统聚光效率的影响,提出了一种运动式线性菲涅耳反射聚光系统,该聚光系统依靠镜场与太阳保持反向运动来减小余弦损失.通过在广西柳州(北纬24°03')搭建的实验台架对系统的可行性和效率增加进行了验证.实验结果表明该新型系统对太阳光的聚光效率比固定式菲涅耳系统提高9%左右,与理论计算值相当.文中亦利用光学仿真分析对系统布置的优化进行了探讨.分析结果表明在现有系统参数的基础上,适当降低接收器高度可进一步减小余弦损失;在二次聚光器接收允许的范围内适当增大镜元间距还可减小镜场遮挡损失,继续提高系统聚光集热效率.As a kind of geometric loss caused by the system structure of linear Fresnel reflector,cosine loss has an important affect on the concentration ratio; accordingly a new type of linear Fresnel reflector system was designed,it could decrease cosine loss by shifting its mirror field onto opposite direction with solar. A test system built in Liuzhou,Guangxi Province at a latitude of 24°03＇ N to validate the feasibility and practice efficiency of theoretic design. The results show that the concentration ratio of the new system has been improved by 9%, comparing with the fixed system, corresponding with the theoretical calculation result. Optical simulation was subsequently developed,and the simulative result will be used to provide guidance for optimizing future system. Analysis results show that the parameters on the basis of the existing system,due to lower receiver height can be further reduced to cosine loss; secondary concentrator,when it receives increasing mirror spacing within the allowed range,can also reduce the loss of field block,continue to improve the system concentrating.

关 键 词：线性菲涅耳聚光系统 余弦损失 二次聚光器 光学仿真分析 

分 类 号：TK513.1[动力工程及工程热物理—热能工程]