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Title: Dust-induced shading on photovoltaic modules
Authors: Qasem, Hassan
Betts, Thomas R.
Mullejans, Harald
AlBusairi, H.
Gottschalg, Ralph
Keywords: Amorphous silicon
Crystalline silicon
Soiling ratio
Spectral response
Issue Date: 2014
Publisher: © John Wiley & Sons, Ltd.
Citation: QASEM, H. ... at el., 2014. Dust-induced shading on photovoltaic modules. Progress in Photovoltaics: Research and Applications, 22 (2), pp. 218 - 226.
Abstract: The effect of dust on photovoltaic modules is investigated with respect to concentration and spectral transmittance. Samples were collected in the form of raw dust as well as accumulated dust on exposed sheets of glass at different tilt angles. Spectral transmittance of the samples was determined. Transmittance variation between top, middle and bottom was identified for samples collected at different inclinations, where the worst case was seen at a tilt angle of 30o with a non-uniformity of 4.4% in comparison with 0.2% for the 90° tilt. The measured data showed a decrease in transmittance at wavelengths <570 nm. Integrating this with measured spectral responses of different technologies demonstrates that wide band-gap thin-film technologies are affected more than, for example crystalline silicon technologies. The worst case is amorphous silicon, where a 33% reduction in photocurrent is predicted for a dust concentration of 4.25 mg/cm2. Similarly, crystalline silicon and CIGS technologies are predicted to be less affected, with 28.6% and 28.5% reductions in photocurrent, respectively. The same procedure was repeated with varying Air Mass (AM), tilt angle and dust concentration values to produce a soiling ratio table for different technologies under different AM, tilt angle and dust concentration values.
Description: Closed access
Version: Published
DOI: 10.1002/pip.2230
URI: https://dspace.lboro.ac.uk/2134/17671
Publisher Link: http://dx.doi.org/10.1002/pip.2230
ISSN: 1062-7995
Appears in Collections:Closed Access (Mechanical, Electrical and Manufacturing Engineering)

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