发电技术2025，Vol.46Issue(3)：590-599,10.DOI:10.12096/j.2096-4528.pgt.23184
线性菲涅尔集热系统焦距优化建模仿真及实验验证
Modeling Simulation and Experimental Verification of Focal Length Optimization in Linear Fresnel Collector
摘要
Abstract
[Objectives]In order to improve the concentrated light interception rate of linear Fresnel collector(LFC),increase the error control threshold of the tracking system,and enhance the system's photothermal conversion efficiency,it is necessary to study the variation patterns of light spot width on the primary reflector.Therefore,the reflected light spot width of the LFC micro-arc mirror is modeled,simulated and experimentally studied.[Methods]Based on the structural characteristics of the LFC,a light concentrating model of the micro-arc primary reflector is developed.Through MATLAB simulation analysis,the variation patterns of light spot width under the boundary conditions of the micro-arc primary reflector are obtained.A light spot test platform is developed,which simulates solar incidence angles of different seasons and times of the day by changing the angle of the test platform and adjusting the position of the receiver board,to verify the accuracy and effectiveness of the simulation results.[Results]Due to the presence of the solar angle,the reflected light spot width increases by 75.8％compared to the parallel light condition.The experimental results of rotating test platform show that the variation patterns of the measured light spot width are consistent with the simulation results.Under the influence of the solar angle,the maximum tracking error control margin of the LFC is 0.173° in winter and 0.207° in summer.[Conclusions]The tracking control accuracy of the LFC system in winter should be 16.4％higher than that in summer.Therefore,the focal length of the LFC micro-arc reflector should be designed based on the tracking control margin of the light spot width in winter.关键词
太阳能/光热发电/集热系统/线性菲涅尔/聚光集热/反射光斑宽度/聚光拦截率/微弧形反射镜Key words
solar energy/photothermal power generation/heat collection system/linear Fresnel/concentrating heat collection/reflected light spot width/concentrated light interception rate/micro-arc mirror分类
能源与动力引用本文复制引用
张志勇,孔令刚,范多进,路小娟..线性菲涅尔集热系统焦距优化建模仿真及实验验证[J].发电技术,2025,46(3):590-599,10.基金项目
国家自然科学基金项目(52266012) （52266012）
甘肃省科技重大专项(22ZD6GA063,20ZD7GF011) （22ZD6GA063,20ZD7GF011）
酒泉市科技支撑计划项目(2022CA10250) （2022CA10250）
敦煌市科技计划项目.Project Supported by National Natural Science Foundation of China(52266012) （52266012）
Major Science and Technology Projects of Gansu Province(22ZD6GA063,20ZD7GF011) （22ZD6GA063,20ZD7GF011）
Jiuquan Science and Technology Support Plan Project(2022CA10250) （2022CA10250）
Dunhuang Science and Technology Plan Project. （）
