A unified global investigation on the spectral effects of soiling losses of PV glass substrates: preliminary results.

Micheli, Leonardo; Fern�ndez, Eduardo F.; Smestad, Greg P.; Alrashidi, Hameed; Sarmah, Nabin; Sellami, Nazmi; Hassan, Ibrahim A.I.; Kasry, Amal; Nofuentes, Gustavo; Sood, Neeru; Pesala, Bala; Senthilarasu, S.; Almonacid, Florencia; Reddy, K.S.; Muller, Matthew; Mallick, Tapas K.

Abstract

The present work reports on the initial results of an international collaboration aiming to investigate the spectral effects of soiling losses. Identical glass coupons have been exposed outdoors for eight weeks in different locations worldwide, and weekly direct and hemispherical transmittance (T%) measurements are compared. Maximum losses as high as 7% and 50% in hemispherical and direct transmittance, respectively, have been found during the 8-week outdoor exposure. At the end of the data collection, a preliminary analysis of the spectral impact of soiling has been performed. The results show that the blue end of the spectrum is more affected and that lower hemispherical T% correlate to larger area covered by particles.

Citation

MICHELI, L., FERNÁNDEZ, E.F., SMESTAD, G.P., ALRASHIDI, H., SARMAH, N., SELLAMI, N., HASSAN, I.A.I., KASRY, A., NOFUENTES, G., SOOD, N., PESALA, B., SENTHILARASU, S., ALMONACID, F., REDDY, K.S., MULLER, M. and MALLICK, T.K. 2018. A unified global investigation on the spectral effects of soiling losses of PV glass substrates: preliminary results. In the Proceedings of the 44th Institute of Electrical and Electronics Engineers (IEEE) photovoltaic specialist conference 2017 (2017 IEEE PVSC-44), 25-30 June 2017, Washinghton, USA. Piscataway, NJ: IEEE [online], article ID 8366317. Available from: https://doi.org/10.1109/PVSC.2017.8366317

• Conference Name: 44th Institute of Electrical and Electronics Engineers (IEEE) photovoltaic specialist conference 2017 (2017 IEEE PVSC-44)
• Conference Location: Washington, USA
• Start Date: Jun 25, 2017
• End Date: Jun 30, 2017
• Acceptance Date: Mar 22, 2017
• Online Publication Date: Nov 5, 2018
• Publication Date: Nov 5, 2018
• Deposit Date: Jun 20, 2019
• Publicly Available Date: Jun 20, 2019
• Publisher: Institute of Electrical and Electronics Engineers (IEEE)
• ISBN: 9781509056064
• DOI: https://doi.org/10.1109/PVSC.2017.8366317
• Keywords: Photovoltaic systems; Reliability; Optical losses; Soiling
• Public URL: https://rgu-repository.worktribe.com/output/249241