Abstract
ABSTRACT The accumulation of dust on solar panels severely affects the power generation efficiency of photovoltaic systems. It is necessary to understand the cleaning mechanism of brush filaments against solar panels for mechanical cleaning. In this paper, the cleaning force was calculated in using the nylon brush as the actuator. Under three bending states of brush filaments, the mechanical model was derived by analyzing the interaction force of filament and dust, which assumed that the dust particles are rigid balls and the brush filaments are flexible beams. The normal force of the dust particle against the filament is dependent on the deflection angle, the axial and radial displacement of the terminal filament, and the cleaning force also depends on them. The average relative error is 9.2676% of the normal force between the model and experiment in an acceptable value. The results indicate that the nylon brush filaments have the optimal cleaning effect for solar panels, which the length of the filament is 20 mm, the filament diameter is 0.3 mm, and the axial displacement is 13–15 mm. This research presented an alternative solution to design the new tool for improving the cleaning efficiency of dust particles.
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