Design and test of pneumatic dedusting equipment for photovoltaic panels

Abstract

The multi-stage expansion cavity nozzle working with the vacuum dust suction cavity can suppress the re-entrainment of dust while removing the dust on the photovoltaic panels. But the dimension match and the form of the combination have not been studied adequately. In order to obtain the optimal cleaning performance and the energy consumption, an integrated pneumatic dust removal device is proposed. The internal flow field simulation and CFD-DEM simulation are carried out to optimize the size of the dust removal device and the combination form. Then the dust removal device was produced and the dust removal tests were carried out in dry and wet environments. The test results show that when the inlet pressure is 0.8 MPa, the integrated dust removal device can achieve the highest dust removal rate of 96.51% in dry environment and 85.22% in wet environment. Finally, a pneumatic dedusting equipment with the dust removal device was built and the cleaning performance tests were carried out. The test results show that the photovoltaic power generation efficiency of the entire photovoltaic module was increased by about 16.34%, which verified the feasibility of the pneumatic dedusting equipment.