基于柔性梁的太阳能电池板清洁力研究  

Research on the cleaning force of solar panel based on flexible beam

作　　者：杭茂尧 高德东 王珊 Hang Maoyao;Gao Dedong;Wang Shan(School of Mechanical Engineering,Qinghai University,Xining 810016,China)

机构地区：[1]青海大学机械工程学院,青海西宁810016

出　　处：《可再生能源》2018年第9期1290-1295,共6页Renewable Energy Resources

基　　金：国家自然科学基金(51566015)

摘　　要：太阳能电池板表面的积灰严重降低了光伏系统的发电效率。在宏观力理论分析的基础上,假设灰尘颗粒为刚性小球,刷丝为柔性梁,分析推导出柔性梁与灰尘颗粒之间的力学模型。依据Elastica理论,分析出柔性梁形变与受力之间关系的超越方程,结合椭圆积分表计算柔性梁的受力情况,得到了灰尘颗粒对刷丝的正压力与刷丝末端偏转角、轴向位移、径向位移三者之间的关系。根据作用力与反作用力,刷丝对灰尘颗粒的正压力等于灰尘颗粒对刷丝的正压力,依据刷丝对灰尘颗粒的正压力计算刷丝对灰尘颗粒的清洁力。结果表明:刷子对太阳能电池板作用力以及清洁力大小均取决于刷丝直径和轴向位移,刷丝直径越大,清洁力越大;刷丝长度为20 mm,轴向位移在14～18 mm时,清洁力较大,清洁效果好。通过刷丝对灰尘颗粒清洁力大小的研究,可以为太阳能电池板机械除尘提供理论依据。The accumulated ash on the surface of the battery plate seriously reduces the power generation efficiency of the photovoltaic system. Based on the theoretical analysis of macroscopic force, it is assumed that the ash is a rigid ball and the brush filament is a flexible beam. The mechanical model between the flexible beam and the ash is derived. According to the Elastica theory, the transcendental equation of the relationship between the deformation and the force of the flexible beam is analyzed, and the force condition of the flexible beam is calculated according to the elliptic integral table. The relationship between the positive pressure of the ash on the brush filament and the deflection angle, axial displacement, and radial displacement of the brush filament end is obtained. the cleaning force of the brush filament on the ash is calculated according to the positive pressure of the brush filament on the ash. The results show that the force of the brush on the solar panel depends on the filament diameter and the axial displacement. The size of the cleaning force also depends on the two. The larger the diameter of the filament, the greater the cleaning force. When the brush filament length is 20 mm, the axial displacement is 14～18 mm, the cleaning power is great, and the cleaning effect is good. The study on the cleaning power of ash by brush filaments provides a theoretical basis for mechanical dust removal of solar panels.

关 键 词：柔性梁 太阳能电池板 灰尘颗粒 清洁 ELASTICA 椭圆积分表 

分 类 号：TK513[动力工程及工程热物理—热能工程] TM914.4[电气工程—电力电子与电力传动]