The Design Of Automatic Dust Removal Devicefor Photovoltaic Module

Photovoltaic (PV) module, a device that converts solar energy to electricalenergy,usually has the lifetime of20-25years. One of the basic technical parameters isphotoelectric conversion efficiency, which decline gradually over time because a lot offactors.However, the environmental factors are more important, especially the dust effect.The dust layer deposited on the PV glass surface not only reduce the efficiency, but alsocause hot-pot effect which can make temperature rise and eventually ruin PV modules.So, it is important and necessary that search for a way to keep modules out of the dusteffect.In our present work, anexternal mechanical dust removal device(EMDRD) for PVmodules was successfully designed, trial-manufactured, tested and verified based onanalysis of the PV modules’ structure, the dust effect mechanism and thephysicochemical property of dust grains. Our EMDRD can work well without anyauxiliary materials, such as liquid-like agent or water. Other features of this deviceinclude intelligence, low power, self-cleaning and no secondary pollution. The result oftest demonstrates that the device is feasible in technology, reasonable in design, reliablein operation and valuable in application.First of all, analysis the structure of the photovoltaic module and the regular of thedust cover, as well as the ideal dust removal deviceshould have the basic technicalcharacteristics. Determining the overall program and the process route according to theobjectives of automatic dust removal device, provided the basis for structural design ofthe device.Self-designed aroller brush rotatingsmart dustremoval device withoutliquid-assisted. The device includes power source, transmission mechanism, actuatorsand control part.With the help of Adams simulation software to analyze the movement characteristicand regular of the cam mechanism, and the transmission mechanism.It has verified thecorrectness of the three dimensional model, and provided optimization basis forsubsequent automatic control. Using HyperWorks finite element analysis software toanalysis the critical components of the device and improve it.To improve designreliability, useful life and lightweight requirements,as well as compensation the defects during theParts processing process.MCU was used to design the total system and the control flow,according to motionof mechanical device and the control requirements of the automatic dust removalsystem.Include motion control components, automaticdetection components, remotereceive instruction components and the total system framework. Guarantee the automaticdust removal device of PV module stable operation and reliable.At last.Prototype was analyzed when it was operated, and the comparison test of thedust removal effect. Results show that the prototype operatessmoothly, dust removaleffect is remarkable, has the positive significance of engineering practice.