Analysis and Test of Dust Removal on Photovoltaic Plate Surfaces Based on High Speed Airflow

Abstract

Abstract: Aiming at the influences of dusts on the power generation efficiency of the photovoltaic panels, the adhesion model of the dust particles on the surfaces of the photovoltaic panels was established based on the analysis of the interactions among dust particles and the surfaces of the photovoltaic panels combining the gravity and air buoyancy of the particles themselves. By analyzing the forces of dust particles in the flow fields, the detachment model of dusts under the actions of airflow was established, and the required airflow velocity with respect to the particle sizes and densities and the surface properties of the photovoltaic panels was determined. Finally, a dust removal test scheme was designed based on super air knife to remove dust particle samples in sampling areas. The test results verify the correctness of the theoretical model, and prove the high speed airflow generated by super air knife has good dust removing effect, which may avoid damaging the surfaces of the photovoltaic panels and reducing the energy consumption during cleaning.

Key words: particle adhesion, particle detachment, super air knife, dynamic pressure

摘要： 针对灰尘对光伏板发电效率的影响，基于灰尘颗粒与光伏板表面之间的相互作用力以及颗粒本身所受的重力和空气浮力的分析，建立了灰尘颗粒在光伏板表面的黏附模型。通过分析灰尘颗粒在流场中的受力，建立了气流作用下的灰尘脱离力学模型，确立了灰尘颗粒脱离所需的气流速度与灰尘颗粒的粒径、密度以及光伏板表面材料特性参数之间的关系。设计了基于超级风刀的除尘试验方案，对取样区域内的灰尘颗粒样本进行冲扫去除。试验结果验证了理论模型的正确性，并证明了超级风刀产生的高速气流具有较好的除尘效果，能够最大程度地避免损伤光伏板表面，减小清洁除尘能耗。

关键词: 颗粒吸附, 颗粒脱离, 超级风刀, 动压力

CLC Number:

DU Xiaoqiang1,2;LIU Enxiao1;WU Chuanyu1,3;XU Nannan1;YUAN Bo1. Analysis and Test of Dust Removal on Photovoltaic Plate Surfaces Based on High Speed Airflow[J]. China Mechanical Engineering.

杜小强1,2;刘恩晓1;武传宇1,3;许南南1;袁博1. 基于高速气流的光伏板表面灰尘去除分析与试验[J]. 中国机械工程.

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