Effect of relative humidity on dust removal performance of electrodynamic dust shield

Wasim Javed, Bing Guo

Research output: Contribution to journalArticle


In this study, the dust removal efficiency of a two-phase, standing-wave electrodynamic dust shield (EDS) was investigated as a function of relative humidity (RH) in single operation mode under constant RH and in cyclic operation mode with alternating RH conditions. It was found that in single-operation mode with a nominal dust loading of 200 mg m−2, the EDS efficiency decreased from 22% to 9% when the RH increased from 10% to 80%. This could be attributed to the effect of RH on particle adhesion force and its effect on the dissipation of electrostatic charges. In cyclic-operation mode under alternating RH mimicking diurnal humidity patterns in the field and the timing of EDS activation, the cycle type had some effect on the EDS efficiency. The EDS efficiency was found higher with humid activation than with dry activation, while only the “long-humid-short-dry” cycle had statistically lower EDS efficiency than the other cycles. The findings of this study suggest that the effect of humidity on EDS efficiency depends on the diurnal RH cycles and the mode of EDS operation, and it is possible to maximize the soiling mitigation benefits of EDS by properly timing the activation in cyclic operations.

Original languageEnglish
Article number103434
JournalJournal of Electrostatics
Publication statusPublished - May 2020



  • EDS cyclic operation
  • Electrostatic potential
  • Humidity cycles
  • Particle adhesion

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering

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