Solar Flux Measuring and Optical Efficiency Forecasting of the Linear Fresnel Reflector Concentrator after Dust Accumulation  

作　　者：ZHAO Xiaoyan YAN Suying ZHANG Na ZHAO Ning GAO Hongwei 

机构地区：[1]College of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot,010051,China [2]Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing,100190,China [3]University of Chinese Academy of Sciences,Beijing,100049,China

出　　处：《Journal of Thermal Science》2022年第3期663-677,共15页热科学学报（英文版）

基　　金：financial support provided by the National Natural Science Foundation of China(No.51766012);the Scientific Research Project of Colleges and Universities in Inner Mongolia Autonomous Region(No.NJZY21322);Major science and Technology Project of Inner Mongolia(No.2019ZD014 and No.2021ZD0030);the Natural Science Foundation of Inner Mongolia(No.2019MS05025);the Scientific Research Project of Inner Mongolia University of Technology(No.ZZ202019)。

摘　　要：The linear Fresnel reflector concentrator(LFRC)is widely used in the field of solar energy utilization due to its simple structure,low cost,and excellent wind resistance.Nevertheless,the LFRC operates outdoors all year round,and the dust accumulation on the mirror will reduce the optical efficiency of the system,so it needs to be perfected and improved.In this paper,a focal plane energy flux experimental device was designed to test the energy flux of the system under different dust accumulation times.The results indicate that,the dust density on the mirror increased and the energy flux on the focal plane decreased with increase of dust accumulation time.After undergoing dust accumulation for 35 days,the dust density on the mirror reached 4.33 g/m^(2)and the average energy flux on the focal plane decreased to 1.78 kW/m^(2).Additionally,the variation of reflectivity caused by dust accumulation on mirror was taken as the quantitative index,and a prediction model for the impact of dust on the optical efficiency of the system was proposed.The results will provide guidance for improving the optical efficiency of the LFRC.

关 键 词：dust accumulation energy flux linear Fresnel reflector concentrator optical efficiency forecast 

分 类 号：TM615[电气工程—电力系统及自动化]