Soiling of photovoltaic modules- Review

Shaju, A. R.; Chacko, Rani

doi:10.1088/1757-899x/396/1/012050

Cited by 33 publications

(13 citation statements)

References 19 publications

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“…The highest values were observed near the local latitude, 23º. Similar results were previously reported in the literature [4][5][6][7][8][9][10]13].…”

Section: Discussionsupporting

confidence: 89%

“…Another strategy to prevent the losses caused by the effect of soiling consists on a regular cleaning of the PV modules. Depending on the purpose and size of the application, it may also become economically feasible to clean at regular intervals, whether it is manually or mechanized performed [9][10]. Considering these two strategies, the present work has quantified the values of losses caused by soiling deposition in association with different tilt and how this angulation influences the natural cleaning of the modules by rainfall.…”

Section: Introductionmentioning

confidence: 99%

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Soiling accumulation impact on PV modules installed at different tilted angles in São Paulo, Brazil

Misquita

Zilles

2022

J. Phys.: Conf. Ser.

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The present study was carried out at the University of São Paulo (USP), in the capital campus, in Butantã, São Paulo. On the rooftop of the Photovoltaic Systems Laboratory (LSF). This study used twenty photovoltaic modules with a unit power of 20 Wp. Before the beginning of the study, the modules were exposed to natural light so that they would suffer the LID effect. Subsequently, all modules were calibrated to measure the solar irradiance, using IEC 60904-2 using a pyranometer as a secondary reference sensor. After calibration, the modules were arranged in pairs, with angles ranging from 0 to 45° as reference to the surface, with a difference between pairs of 5°. To evaluate the influence of rainfall, which is the main responsible for the natural cleaning of the modules. The pluviometric values were obtained from the meteorological station of the Institute of Astronomy, Geophysics and Atmospheric Sciences of the USP. The module allocated at 0°, “Dirty” was used as reference and all the results obtained were calculated in relation to it. The results for the 18 months of experiment showed the non-linear influence of soiling, acting in a stronger way for the less inclined angles, and after 10°, this influence, became less relevant, in comparison to the previous angle. The largest losses were found for 0° and 5°, the losses exclusively to soiling were 8.16 % and 6.82 % respectively. For angles greater than 10°, the soiling effect was attenuated, which resulted in less significant losses, for 15° the difference between the impact of dirt compared to 10° was only 0.1%. Rainfall also had a very relevant impact on the experiment. This study concluded that the optimal angle, where dirt accumulation was reduced, the rainfall cleaning and relative gains were optimized is in the range between 20° and 30°.

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“…The highest values were observed near the local latitude, 23º. Similar results were previously reported in the literature [4][5][6][7][8][9][10]13].…”

Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Soiling accumulation impact on PV modules installed at different tilted angles in São Paulo, Brazil

Misquita

Zilles

2022

J. Phys.: Conf. Ser.

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“…The value and the influence of the PV module soiling is defined with the soiling ratio (SR). SR is the ration of the power between the soiled PV module P PVD and the clean PV module P PVC [33]:…”

Section: Analysis Methodologymentioning

confidence: 99%

A Long-Term Condition Monitoring and Performance Assessment of Grid Connected PV Power Plant with High Power Sizing Factor under Partial Shading Conditions

et al. 2020

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Partial shading conditions of photovoltaic (PV) modules often occurs in urban areas leading to losses in electricity power generation of the PV power plant. The purpose of this study is to present how the PV power plant with high value of inverter power sizing factor (Kinv) can achieve high performance and power production under partial shading conditions with high shading losses. In this paper the results of long-term monitoring, performance analysis and experimental results are presented, while the results are compared to the estimated values calculated using PVsyst software. The study focused on the PV power plant at the Faculty of Technical Sciences (FTS) in Novi Sad, Republic of Serbia, for the period between the years 2012 and 2019. It has been shown that the values of PV power plant performance parameters are better than expected (very high), and resemble the power plants operating without shading. The high value of the inverter power sizing factor may lead to occasional saturation of the inverter when certain conditions are met, but most of the times it allows the inverter to operate at a more optimal power level. PV module soiling and power degradation is within the limits mentioned in the literature. The increase in Kinv in the partial shading conditions favorably affects the performance, does not degrade the efficiency of the inverter at saturation, reduces the effect of soiling and aging of PV modules, leading to higher power production.

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“…Soiling mostly due to pollen and causing a power reduction of 4.1% was reported during a rainless spring period in southern Portugal (Csa climate) [54]. Pollen is usually mentioned among the soiling agents, particularly in agricultural areas [6,[83][84][85]. Some authors have managed to identify the pollen grains of the soiling layers [12,80,[86][87][88].…”

Section: Soiling By Pollen On Pv Modules: a Reviewmentioning

confidence: 99%

Influence of Pollen on Solar Photovoltaic Energy: Literature Review and Experimental Testing with Pollen

2020

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This work attempts to shed some light on the impact of organic soiling due to pollen on solar photovoltaic (PV) power generation. Apart from introducing several soiling-related pollen features, the previous works reporting soiling by pollen have been reviewed. Local observations from late winter to early spring showed that a rooftop PV system experienced both uniform and non-uniform soiling issues, which were mainly caused by pollen from nearby cypress specimens. In addition, this work publishes preliminary results regarding an artificial soiling test performed with pollen. In this test, soda lime float glass coupons were artificially soiled with fresh cypress pollen. A linear relationship was found between the pollen mass density (ρA) and the glass averaged transmittance (TAVE) for values up to 9.1 g/m2. In comparison with other artificial soiling tests performed with different soiling agents, the transmittance loss caused by pollen cypress deposition was relatively high and spectrally selective.

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Soiling of photovoltaic modules- Review

Cited by 33 publications

References 19 publications

Soiling accumulation impact on PV modules installed at different tilted angles in São Paulo, Brazil

Soiling accumulation impact on PV modules installed at different tilted angles in São Paulo, Brazil

A Long-Term Condition Monitoring and Performance Assessment of Grid Connected PV Power Plant with High Power Sizing Factor under Partial Shading Conditions

Influence of Pollen on Solar Photovoltaic Energy: Literature Review and Experimental Testing with Pollen

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