镜面积尘物化特性及其对菲涅耳高倍聚光光伏及光热系统的影响  

Physicochemical Characteristics of Accumulated Dust on Mirror Surface and Its Influence on Fresnel High Magnification Focused Photovoltaic/Thermal System

作　　者：王亚辉[1] 苏日力格 赵宁 赵晓燕[1] 邱云峰 Wang Yahui;Su Rilige;Zhao Ning;Zhao Xiaoyan;Qiu Yunfeng(College of Energy and Power Engineering,Inner Mongolia University of Technology,Huhhot 010051,Inner Mongolia,China)

机构地区：[1]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：《光学学报》2024年第5期101-111,共11页Acta Optica Sinica

基　　金：内蒙古自然科学基金联合面上项目(2023LHMS05047);自治区直属高校基本科研业务费项目-在校优秀学生提升基本科研能力(ZTY2023038);内蒙古自治区研究生科研创新项目(S20231135Z)。

摘　　要：针对菲涅尔高倍聚光光伏及光热系统的镜面因暴露于自然环境,其表面积尘对系统输出特性产生较大影响这一问题,参考测试点自然积尘成分和地表情况,选取6种典型积尘颗粒,采用X射线衍射分析仪、能谱仪和扫描电镜等设备,研究其颗粒形貌、物质和元素组成;并开展菲涅耳高倍聚光光伏及光热系统实验研究,利用灰色关联度法处理实验数据,分析积尘物化性质对系统电热输出性能的影响。结果表明,积尘成分复杂,岩石类颗粒中碳酸钙、碳酸镁钙、钙钠长石含量较多,煤矸石和焦炭颗粒中包含大量的硅酸盐;各类型积尘对系统电热输出影响不同,其中镜面积尘煤矸石粉末每增加1 g/m^(2),系统综合性能下降15%,影响最大;积尘物质组成对系统电功率(E)影响关联度排序为E_(SiO_(2)>E_(Fe_(2)O_(3)>E_(CaCO_(3)>E_(CaMg)(CO_(3)_(2),对系统热功率(T)的影响大小排序为T_(SiO_(2)>T_(CaCO_(3)>T_(Fe_(2)O_(3)>T_(CaMg(CO_(3)_(2);颗粒元素对系统电热输出(P)的影响相同,大小排序为P_(O)>P_(Al)>P_(Ca)>P_(Mg)>P_(Fe)>P_(Si)>P_(C)。Objective Fresnel high magnification focused photovoltaic/thermal system has the advantages of a high concentration ratio,small footprint,low lens processing cost,etc.,and it has a broad application prospect in the field of solar electric and thermal utilization,but the accumulation of dust particles on its mirrors leads to the reduction of the system s thermal and electrical efficiency.The current study focuses on two points.One is the effect of the settling law of the accumulated dust particles and their particle size distribution on the concentrating effect,and the other is the effect of the dust density on the mirror surface on the electrical and thermal output characteristics of Fresnel high magnification focused photovoltaic/thermal system.Accumulated dust affects the Fresnel lens transmittance,which in turn weakens and disperses the distribution of concentrating solar energy flow on the surface of photovoltaic cells and reduces their power output.Therefore,it is necessary to effectively remove the accumulated dust.Specific strategies should be adopted for the physical and chemical properties of the accumulated dust,such as the inclination angle and wind speed of the wind blade in wind power dedusting,as well as the configuration and selection of cleaning agents in water jet cleaning.There are many different types of dust on the mirror surface,and it is necessary to prioritize the removal of the accumulated dust that has the greatest impact on the electrical energy output.In view of the geographical characteristics and the influence of anthropogenic activities and the composition of naturally accumulated dust particles at the test site,in this study,six kinds of particle samples such as calcite,albite,marble,loess,coke,and coal gangue are selected as the research objects,so as to analyze the correlation of the influence law of the physicochemical nature of the accumulated dust particles on the Fresnel high magnification focused photovoltaic/thermal system,provide a theoretical basis for the prediction of th

关 键 词：测量 菲涅耳系统 积尘颗粒 物质组成 颗粒元素 电热输出性能 

分 类 号：TK519[动力工程及工程热物理—热能工程]