Energy yield loss caused by dust deposition on photovoltaic panels

Effect of dust and methods of cleaning on the performance of solar PV module for different climate regions: Comprehensive review.

Photovoltaics (PVs) are promising sustainable energy generators, yet the higher initial cost of PV systems compared to the conventional fossil fuel based energy systems remains a barrier to their large-scale adaptability Concentrating solar radiation onto a smaller area by replacing expensive cell materials with cheaper optical materials can be an alternative way to reduce PV cost, but concentrated photovoltaics (CPV) yield substantially higher cell temperatures reportedly detrimental for CPV life and electrical yield Various thermal management approaches have been adopted to mitigate the adverse effect of temperature on CPV life and performance The potential use of thermal energy discarded in CPV thermal management systems has been traditionally overlooked The aim of this article is to briefly review the progress in PV cells, different CPV systems, and thermal issues specific to concentration techniques and propose potential uses of thermal energy recovered from the CPV The review finds that temperature mitigation and thermal energy recovery & utilization can be a promising pathway to improve CPV performance

Concentrated photovoltaic: A review of thermal aspects, challenges and opportunities

The accumulation of dust and other environmental contaminants on PV modules, also known as PV module soiling, is a significant source of lost potential power generation for PV installations. Designers and operators of utility-scale solar power plants are increasingly seeking methods to quantify soiling-related losses, in order to improve performance modeling and verification or to optimize washing schedules. Recently, soiling measurement equipment has been introduced based on the measurement of two co-planar PV modules, one of which is regularly cleaned, and the other of which naturally accumulates environmental contaminants. These measurements are used to determine a soiling ratio (SR), which may be applied as a derate factor in analysis of the PV system performance. In this work, we examine the difference between a soiling ratio metric calculated from measured temperature-corrected short-circuit current values (SRIsc), which represents the fraction of irradiance reaching the soiled modules, versus a soiling ratio calculated from measured temperature-corrected PV module maximum power values (SRPmax), which represents the fraction of power produced by the soiled modules compared to clean modules. We examine both techniques for CdTe and c-Si module technologies. This study is motivated by the fact that variations in module efficiency versus irradiance, as well as any non-uniformity of soiling, may introduce differences between the power losses estimated from short-circuit current values versus actual soiling-induced power losses. For CdTe, the SRIsc method is found to be a good proxy for the SRPmax method for nonuniform soiling levels up to 11%.

/pdf/comparing-pv-power-plant-soiling-measurements-extracted-from-3s94hvqqrl.pdf

Comparing PV power plant soiling measurements extracted from PV module irradiance and power measurements

Optimum tilt angle for photovoltaic system in desert environment

Photovoltaic Modules: Effect of Tilt Angle on Soiling

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Photovoltaic Modules: Effect of Tilt Angle on Soiling