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

Rima J. Isaifan, Daniel Johnson Orcid Logo, Luis Ackermann, Benjamin Figgis, Mohammed Ayoub

Solar Energy Materials and Solar Cells, Volume: 191, Pages: 413 - 421

Swansea University Author: Daniel Johnson Orcid Logo

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DOI (Published version): 10.1016/j.solmat.2018.11.031

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, el...

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Published in: Solar Energy Materials and Solar Cells
ISSN: 0927-0248
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa47952
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, Soiling mechanism, Capillary force, Dust particles, vander Waal ,Qatar, Atomic Force Spectroscopy
College: Faculty of Science and Engineering
Start Page: 413
End Page: 421

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