Evaluation of the adhesion forces between dust particles and photovoltaic module surfaces

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Soiling of Photovoltaic (PV) modules is a growing area of concern due to the adverse effect of dust accumulation on PV performance and reliability. In this work, we report on four fundamental adhesion forces that take place at the first stage of soiling process. These are capillary, van der Waal, electrostatic and gravitational forces. It is found that under high relative humidity, the adhesion mechanism between dust particles and PV module surfaces is dominated by capillary force, while van der Waal force dominates under dry conditions. Moreover, real field data for long soiling periods over solar panels in Qatar were investigated and resulted in proposing a novel modified sigmoid function that predicts a relative humidity inflexion value at which transition in the particulate matter deposition rate takes place from low to high values. Moreover, the effect of surface roughness was investigated by measuring adhesion force over clean glass versus substrates that are coated with in-house developed anti-dust titania thin films.

Original languageEnglish
Pages (from-to)413-421
Number of pages9
JournalSolar Energy Materials and Solar Cells
Volume191
DOIs
Publication statusPublished - 1 Mar 2019

Fingerprint

Particles (particulate matter)
Dust
Adhesion
Atmospheric humidity
Van der Waals forces
Particulate Matter
Deposition rates
Electrostatics
Titanium
Surface roughness
Glass
Thin films
Substrates
titanium dioxide

Keywords

  • Adhesion
  • Atomic Force Spectroscopy
  • Capillary force
  • Dust particles
  • Qatar
  • Soiling mechanism
  • vander Waal

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

Cite this

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title = "Evaluation of the adhesion forces between dust particles and photovoltaic module surfaces",
abstract = "Soiling of Photovoltaic (PV) modules is a growing area of concern due to the adverse effect of dust accumulation on PV performance and reliability. In this work, we report on four fundamental adhesion forces that take place at the first stage of soiling process. These are capillary, van der Waal, electrostatic and gravitational forces. It is found that under high relative humidity, the adhesion mechanism between dust particles and PV module surfaces is dominated by capillary force, while van der Waal force dominates under dry conditions. Moreover, real field data for long soiling periods over solar panels in Qatar were investigated and resulted in proposing a novel modified sigmoid function that predicts a relative humidity inflexion value at which transition in the particulate matter deposition rate takes place from low to high values. Moreover, the effect of surface roughness was investigated by measuring adhesion force over clean glass versus substrates that are coated with in-house developed anti-dust titania thin films.",
keywords = "Adhesion, Atomic Force Spectroscopy, Capillary force, Dust particles, Qatar, Soiling mechanism, vander Waal",
author = "Rima Isaifan and Daniel Johnson and Luis Ackermann and Benjamin Figgis and Mohammed Ayoub",
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AU - Isaifan, Rima

AU - Johnson, Daniel

AU - Ackermann, Luis

AU - Figgis, Benjamin

AU - Ayoub, Mohammed

PY - 2019/3/1

Y1 - 2019/3/1

N2 - Soiling of Photovoltaic (PV) modules is a growing area of concern due to the adverse effect of dust accumulation on PV performance and reliability. In this work, we report on four fundamental adhesion forces that take place at the first stage of soiling process. These are capillary, van der Waal, electrostatic and gravitational forces. It is found that under high relative humidity, the adhesion mechanism between dust particles and PV module surfaces is dominated by capillary force, while van der Waal force dominates under dry conditions. Moreover, real field data for long soiling periods over solar panels in Qatar were investigated and resulted in proposing a novel modified sigmoid function that predicts a relative humidity inflexion value at which transition in the particulate matter deposition rate takes place from low to high values. Moreover, the effect of surface roughness was investigated by measuring adhesion force over clean glass versus substrates that are coated with in-house developed anti-dust titania thin films.

AB - Soiling of Photovoltaic (PV) modules is a growing area of concern due to the adverse effect of dust accumulation on PV performance and reliability. In this work, we report on four fundamental adhesion forces that take place at the first stage of soiling process. These are capillary, van der Waal, electrostatic and gravitational forces. It is found that under high relative humidity, the adhesion mechanism between dust particles and PV module surfaces is dominated by capillary force, while van der Waal force dominates under dry conditions. Moreover, real field data for long soiling periods over solar panels in Qatar were investigated and resulted in proposing a novel modified sigmoid function that predicts a relative humidity inflexion value at which transition in the particulate matter deposition rate takes place from low to high values. Moreover, the effect of surface roughness was investigated by measuring adhesion force over clean glass versus substrates that are coated with in-house developed anti-dust titania thin films.

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KW - Atomic Force Spectroscopy

KW - Capillary force

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KW - Soiling mechanism

KW - vander Waal

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