平面线聚焦菲涅尔透镜的聚焦变化研究  

STUDY ON VARIATION OF FOCAL LENGTH OF FLAT-PLATELINEAR-FOCUSING FRESNEL LENS

作　　者：杨毅 马兴龙[2] 郑宏飞[2] 董玉杰 吴洋 吕楠 Yang Yi;Ma Xinglong;Zheng Hongfei;Dong Yujie;Wu Yang;Lyu Nan(Department of Military Installations,Army Logistics Academy,Chongqing 401311,China;School of Mechanical Vehicular Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]中国人民解放军陆军勤务学院军事设施系,重庆401311 [2]北京理工大学机械与车辆学院,北京100081

出　　处：《太阳能学报》2024年第6期396-400,共5页Acta Energiae Solaris Sinica

基　　金：军队后勤科研计划重点项目(BY114C006);柔性菲涅尔太阳能聚光透镜变焦机制与能量传递规律研究(52006013)。

摘　　要：针对平面线聚焦菲涅尔太阳能聚光透镜在光线倾斜入射条件下的焦距变化问题,从菲涅尔透镜结构、材料折射率以及光线倾斜入射角对其焦距的影响出发,分析得出兼顾许用倾斜入射角范围大和焦距变化范围小的设计参数。进而示例设计宽度为200 mm、焦距为300 mm、材料折射率为1.5的平面线聚焦菲涅尔透镜,分析其焦距变化特性,并采用缩短接收面与菲涅尔透镜之间安装距离的方法,分析得到适用于该菲涅尔透镜的最佳接收器宽度和安装位置,使其许用光线倾斜入射角范围达到±40°以上,以此维持平面线聚焦菲涅尔太阳能聚光器的有效工作时间达到接近6 h。The design parameters of a flat-plate linear-focusing Fresnel lens were analyzed based on the influences of its structure,material refractive index,and tilt incident angle of sunlight on focal length.The analysis aimed to achieve large allowable tilt incident angles and small focal length changing ranges.An example was designed with a width of 200 mm,focal length of 300 mm,and material refractive index of 1.5.The characteristics of the Fresnel lens’focal length variation were examined,and an optimal receiver width and mounting position suitable for the lens were determined by shortening the mounting distance between it and the receiving surface.With an allowable light tilt incident angle range reaching±40°or more,nearly six hours of daily effective working time can be maintained.

关 键 词：太阳能 菲涅尔透镜 线聚焦 倾斜入射 焦距变化 

分 类 号：TK519[动力工程及工程热物理—热能工程]