Analyzing wind cleaning process on the accumulated dust on solar photovoltaic (PV) modules on flat surfaces

Yu Jiang, Lin Lu, Andrea R. Ferro, Goodarz Ahmadi

Research output: Journal article publicationJournal articleAcademic researchpeer-review

22 Citations (Scopus)

Abstract

In this study, the particle resuspension theory was used to estimate the wind cleaning process of the dust particles deposited on flat solar photovoltaic (PV) module surfaces. The model includes the effects of adhesion force, as well as, the hydrodynamic force and torque for rolling detachment model in the analysis. The required shear velocity and actual wind velocity for resuspension of particles with diameter ranging from 0.1 to 100 µm were evaluated, varied from 0.23 to 57.56 m/s and 0.82 to 2219.8 m/s, respectively. The effect of particle size and composition on the required removal velocity was also analyzed. Verified with the experimental deposited dust size distribution, large particles with diameter larger than 1 µm were effectively removed by wind. However, wind cleaning process for small particles was found not to be effective due to the large required shear velocity for detachment. In addition to particle sizes, the influence of compositions on the wind cleaning process can be negligible.

Original languageEnglish
Pages (from-to)1031-1036
Number of pages6
JournalSolar Energy
Volume159
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • Accumulated dust
  • Flat surface
  • Particle resuspension
  • PV modules
  • Wind cleaning

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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