光伏面板积尘特性及高效除尘方法研究

发布时间：2018-05-20 16:12

本文选题：积尘特性 + 光伏面板　；参考：《浙江工业大学》2015年硕士论文

【摘要】：随着经济全球化的深入发展,能源消费在加速增长,不可再生能源的资源竞争日益激烈,人们逐渐重视光伏等清洁能源的发展。目前对于提高光伏发电效率的研究主要集中在对安装方式优化、系统性能优化和对新型光电转化材料研发等方面。而太阳能面板积灰问题对于系统效率的影响并未得到充分的重视。光伏面板积尘直接降低其接收到的太阳辐射量,从而降低其输出功率,限制光伏面板正常效能的发挥。论文以杭州市区分布式光伏系统为研究对象,实验测试了积尘情况下的光伏面板输出功率衰减规律,证明了光伏面板定期除尘的必要性,分析了除尘机理、设计了除尘原理机构,并进行了仿真分析和实验验证。主要研究内容如下:1、分析了城市环境中灰尘降落到光伏面板表面形成积尘的原理。2、选择了杭州市内20kWp屋顶光伏电站进行实验研究。研究了安装于屋顶的光伏面板随时间推移在积尘的影响下输出功率特性。将面板在不同光照下的输出功率统一转换到在单位光照下的输出功率进行对比,建立面板积尘时间与其输出效率的拟合函数。综合清洁机器人技术指标、光伏面板发电效率和经济效益平衡等因素,得出最佳的清洁间隔时间n=6天。3、研究了面板表面积尘的物理特性,理论分析了通过颗粒作用力方程来求解颗粒离散相的运动轨迹,以及通过运动轨迹方程求解颗粒速度的方法。4、设计了面板除尘的吸尘结构。重点对吸取口段、弯管段部件进行仿真,用Lagrangian离散相方法在ANSYS软件中计算,得出灰尘颗粒在吸取口中和弯管段中的流速分布、压力分布、不同尘粒大小的灰尘轨迹线,确定吸尘口处的压力最优值。5、设计了光伏面板除尘实验装置进行实验研究,测出了吸尘装置各位置的风速值,验证了理论分析的正确性。
[Abstract]:With the development of economic globalization, energy consumption is increasing rapidly, and the competition of non-renewable energy resources is becoming increasingly fierce. People pay more and more attention to the development of clean energy such as photovoltaic (PV). At present, the research on improving the efficiency of photovoltaic power generation mainly focuses on the optimization of installation mode, the optimization of system performance and the research and development of new photovoltaic conversion materials. However, the influence of solar panel ash deposition on system efficiency has not been paid enough attention to. The dust accumulation of photovoltaic panels directly reduces the amount of solar radiation it receives, thus reducing its output power, limiting the normal performance of photovoltaic panels. This paper takes the distributed photovoltaic system in Hangzhou urban area as the research object, tests the law of output power attenuation of photovoltaic panels under the condition of dust accumulation, proves the necessity of regular dust removal of photovoltaic panels, and analyzes the dust removal mechanism. The principle mechanism of dust removal is designed, and the simulation analysis and experimental verification are carried out. The main research contents are as follows: 1. The principle of dust deposition on the surface of photovoltaic panels in urban environment is analyzed. The 20kWp roof photovoltaic power station in Hangzhou is selected for experimental study. The output power characteristics of the photovoltaic panels mounted on the roof under the influence of dust accumulation over time are studied. The output power of the panel under different illumination is converted to the output power under unit illumination. The fitting function between the dust accumulation time and the output efficiency of the panel is established. Based on the technical index of cleaning robot, the balance of efficiency and economic benefit of photovoltaic panel generation, the optimum cleaning interval of 6 days 路3 was obtained, and the physical characteristics of surface dust of panel were studied. In this paper, the particle force equation is used to solve the moving trajectory of the discrete phase and the method .4 to solve the particle velocity by the motion trajectory equation is analyzed. The dust cleaning structure of the face plate is designed. The simulation of the parts of the suction section and the bend section is emphasized, and the Lagrangian discrete phase method is used to calculate the velocity distribution, pressure distribution and dust trajectory of the dust particles in the suction mouth and the bend pipe section by using the Lagrangian discrete phase method in the ANSYS software. The optimum value of pressure at the suction orifice is determined. The experimental device of photovoltaic panel dust removal is designed to carry out experimental research, and the wind velocity values of each position of the dust collector are measured, which verifies the correctness of the theoretical analysis.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM615

【参考文献】