Dust removal from solar concentrators using an electrodynamic screen

Chia Yang Chen, Jennifer K.W. Chesnutt, Chih Hsiang Chien, Bing Guo, Chang Yu Wu

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The electrodynamic screen (EDS), which transports particles by electrodynamic waves, is a promising technology to repel deposited dust from solar devices in places where water resources are scarce. As gravitational force may impede dust removal on concave or parabolic solar concentrators, this study aimed to determine the feasibility of the EDS to transport dust either upward or laterally, for application to concave solar devices. A discrete element method was used to computationally simulate the transport, collision, and adhesion of charged dust particles that were subject to traveling waves on an inclined EDS. High electric field strength (>2 kVp-p mm−1), short distance between electrodes, and a low adhesion circumstance resulted in the best cleaning efficiency with a wave that traveled up the incline. Over half of the particles moved up the incline successfully under this operational condition. To improve the cleaning efficiency, a new EDS configuration wherein the wave transported particles laterally along the surface (instead of up the incline against gravity) was proposed. With the new configuration, the performance clearly improved in all cases. Although some particles moved down the incline under most conditions, the application of EDS to clean dust off solar concentrators is achievable with optimal parameters.

Original languageEnglish
Pages (from-to)341-351
Number of pages11
JournalSolar Energy
Volume187
DOIs
Publication statusPublished - 15 Jul 2019

Fingerprint

Solar concentrators
Electrodynamics
Dust
Cleaning
Adhesion
Water resources
Finite difference method
Particles (particulate matter)
Gravitation
Electric fields
Electrodes

Keywords

  • Discrete element method
  • Dust mitigation
  • Particle adhesion
  • Particulate flow

ASJC Scopus subject areas

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

Cite this

Dust removal from solar concentrators using an electrodynamic screen. / Chen, Chia Yang; Chesnutt, Jennifer K.W.; Chien, Chih Hsiang; Guo, Bing; Wu, Chang Yu.

In: Solar Energy, Vol. 187, 15.07.2019, p. 341-351.

Research output: Contribution to journalArticle

Chen, Chia Yang ; Chesnutt, Jennifer K.W. ; Chien, Chih Hsiang ; Guo, Bing ; Wu, Chang Yu. / Dust removal from solar concentrators using an electrodynamic screen. In: Solar Energy. 2019 ; Vol. 187. pp. 341-351.
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