Design and experimental study on Fresnel lens of the combination of equal-width and equal-height of grooves

3rd International Conference on Advances in Energy, Environment and Chemical Engineering

能源学;生态环境科学;化学工业

Guo, Limin^1 ; Liu, Youqiang^1 ; Huang, Rui^1 ; Wang, Zhiyong^1

Beijing University of Technology, Institute of Laser Engineering, Beijing

100124, China^1

关键词: Concentrating PV;    Concentration ratio;    Experimental test;    Fresnel lens;    Precisely oriented;    SolidWorks;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/69/1/012177/pdf
DOI  :  10.1088/1755-1315/69/1/012177

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

High concentrating PV systems rely on large Fresnel lens that must be precisely oriented in the direction of the Sun to maintain high concentration ratio. We propose a new Fresnel lens design method combining equal-width and equal-height of grooves in this paper based on the principle of focused spot maximum energy. In the ring band near the center of Fresnel lens, the design with equal-width grooves is applied, and when the given condition is reached, the design with equal-height grooves is introduced near the edges of the Fresnel lens, which ensures all the lens grooves are planar. In this paper, we establish a Fresnel lens design example model by Solidworks, and simulate it with the software ZEMAX. An experimental test platform is built to test, and the simulation correctness is proved by experiments. Experimental result shows the concentrating efficiency of this example is 69.3%, slightly lower than the simulation result 75.1%.