湍流作用下光伏面板粘附颗粒脱离的Monte Carlo模拟

MONTE CARLO SIMULATION OF PARTICLE ADHESION ON SURFACE OF PV PANELS UNDER TURBULENT FLOWS

针对目前光伏板表面清洁问题,提出采用高频气流技术去除积尘颗粒。通过借鉴经典固体表面吸附力学基础理论及JKR模型,分别建立不同湿度条件下光伏板表面颗粒吸附的力学模型。通过分析与检测典型光伏板的积尘环境,确定颗粒与光伏板表面各物理特性参数值及参数分布特征,并将各参数分布引入模型中。根据湍流场作用时颗粒脱离表面时的运动方式,建立湍流作用下粘附颗粒脱离表面的计算模型,最终采用Monte Carlo模拟方法计算得到使积尘脱离光伏板表面的临界气流剪切速度。

In order to solve the problem of the surface cleaning of solar panels,a high frequency air flow technique was proposed to remove dust particles.By using the classical adsorption mechanics theory and JKR model,the mechanics model of particle adsorption on the photovoltaic plate surface under different humidity conditions were established.By analyzing and examining the dust environment of typical photovoltaic panels,the physical parameters of particles and photovoltaic panels and their distributions were determined.Then the parameter distributions were introduced into the mechanics model.According to the motion of the particles being detached from the surface under turbulent flows,a computational model for the detachment of particles from the surface under turbulence was established.Finally Monte Carlo simulation method was used to calculate the critical shear velocity of the flow to remove the dust from the photovoltaic panels.