Review on dew water effect on soiling of solar panels: Towards its enhancement or mitigation

Dahlioui, Dounia; Laarabi, Bouchra; Barhdadi, Abdelfettah

doi:10.1016/j.seta.2021.101774

Cited by 19 publications

(15 citation statements)

References 65 publications

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“…Although still object of debate, dew plays a relevant role in both the enhancement and the mitigation of heliostats soiling [222]. While it can cause runoff of particles, it is also likely to promote caking and cementation, which causes strong adhesion between particles and surfaces [175], [223].…”

Section: Adhesion and Removalmentioning

confidence: 99%

Roadmap to Advance Heliostat Technologies for Concentrating Solar-Thermal Power

Zhu¹,

Augustine²,

Mitchell³

et al. 2022

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Heliostat-based concentrating solar-thermal power (CSP) systems can offer immense potential to provide low-cost, dispatchable renewable thermal and electrical energy to help achieve 100% decarbonized energy infrastructure in the United States. Heliostats are a major determinant of both capital cost and performance of state-of-the-art commercial molten salt towers and Generation 3 CSP systems. 1 In 2021, the U.S. Department of Energy (DOE) Solar Energy Technologies Office (SETO) launched the Heliostat Consortium (HelioCon), a five-year initiative to advance heliostat technologies. The HelioCon mission is threefold: (1) establish strategic core testing and modeling capabilities and infrastructure at national labs; (2) support heliostat technology development in relevant industries; and (3) serve as a central repository to integrate industry, academia, and other stakeholders for heliostat technology research, development, validation, and deployment. In this report, HelioCon presents a roadmapping study on advancing heliostat technologies, intended as a central reference for the entire CSP community.1 More information on Gen3 technologies can be found at https://www.energy.gov/eere/solar/generation-3concentrating-solar-power-systems-gen3-csp. vii This report is available at no cost from the National Renewable Energy Laboratory (NREL) at www.nrel.gov/publications. Metrology and StandardsAppropriate measurement techniques and industry standards are fundamental for product design, prototyping, engineering, and improvement. Gaps in metrology:Opto-mechanical metrology (mirror slope error, mirror facet canting error, and heliostat tracking error) is complex, error-prone, and requires high optical precision, necessitating rigorous validation of different technologies using the same measurement parameter(s). Current metrology gaps include:• Lack of at least two viable metrology techniques for a given measurement parameter (such as heliostat tracking error, available for the global CSP industry)• Insufficient or missing validation of any viable metrology technique against a different, trusted metrology technique or ground-truth article. Gaps in standards:Gaps in community-wide standards for site characterization and heliostat design, testing, field design, and field acceptance test protocols result in significant barriers for new developers, extended design cycles, lower investor confidence, and more complicated arbitration between project parties. Gaps include:• Heliostat terminology • Heliostat design guidelines • Heliostat solar field design/simulation guidelines • Heliostat test guidelines • Heliostat solar field acceptance test guidelines • Site characterization guidelines (e.g., wind, topography, soiling characteristics). Recommended pathway forward: Addressing these gaps requires continuing development of new metrology tools and round-robin tests of existing/to-be-developed tools. More importantly, ix This report is available at no cost from the National Renewable Energy Laboratory (NREL) at www.nrel.gov/publications.o...

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Section: Adhesion and Removalmentioning

confidence: 99%

Roadmap to Advance Heliostat Technologies for Concentrating Solar-Thermal Power

Zhu¹,

Augustine²,

Mitchell³

et al. 2022

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“…The effect of this latter as a cleaning agent has not been well investigated in literature. A recent review has been recently published aiming to exploit dew in soiling mitigation (Dahlioui et al 2022a).…”

Section: Natural Cleaningmentioning

confidence: 99%

“…The Moroccan Kingdom has therefore launched special projects for clean energy based on solar energy (Aarich et al 2018; Cantoni and Rignall 2019). However, soiling is a challenge that faces solar technologies (Dahlioui et al 2022a). It is manifested by the accumulation of dirt on the surface of solar panels and can cause signi cant power losses.…”

Section: Introductionmentioning

confidence: 99%

Waterless cleaning technique for photovoltaic panels on dual-axis tracker

Dahlioui

Alaoui

Laarabi

et al. 2022

Environ Sci Pollut Res

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Several soiling mitigation solutions and cleaning techniques have been developed to maintain high e ciency of photovoltaic (PV) panels. First of its kind, the investigation of the adaptability of the cleaning systems to solar trackers has been performed. The majority of these systems are dedicated to xed installations whereas only few systems that can be adapted to solar trackers as presented in the updated cleaning systems background. For this reason, this paper presents an innovative approach which consists of combining trackers with an integrated cleaning system that has been designed. Based on the conducted experimental study, a maximum of 7% in soiling losses has been found for the PV generator of 4 kWp equipped with a dual-axis tracker installed in Rabat-Morocco over almost one year. Consequently, a reduced cleaning prototype has been realized and tested to evaluate the energy recovery based on the performed cleaning. The automatic cleaning has presented a similar e ciency with the manual cleaning with a slight difference of 0.95 pp and an increase of energy of 11.5% in the arid region. Through the economic analysis carried out taking into account the gain in energy production, the automatic cleaning cost was 0.14 €/kWh. It has been found that the cleaning technique based on the telescopic arm would be more effective if the tracker is installed in an arid region where soiling is higher than Rabat. In this case the payback time of the cleaning solution is faster (8 to 9 years), hence its pro tability. Corrective cleaning Manual cleaningManual cleaning requires human resources (labor), material such as soft brushes for dry cleaning as well as water in the case of wet cleaning. Karcher (kaercher.com/us/) which is a company specialized in the cleaning products, has developed cleaning brushes made by natural and nylon bristles that avoid micro-scratches to be created on the solar glass surface. These brushes can be tted with air pressure cleaners.As bene ts, the manual cleaning is considered the most e cient method to recover PV performance and it can be performed whenever required (Gupta et al. 2019b). However, it requires high cost and water which is limited as well as scratches may be produced. According to the study of (Fernández-García et al. 2014), the use of demineralized water and a brush was the most effective compared with a jet of air or water with high pressure. The use of detergent is not required since it does not increase the effectiveness of cleaning.

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“…Besides able to reducing environmental damage, the use of solar panels can save electricity costs continuously. The use of solar panels does not require regular maintenance and the resulting energy savings are an added value for utilizing renewable energy easily [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Design of photovoltaic system for public school building

Abdillah

Satria

Pertiwi

et al. 2022

IJEECS

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The increase in energy needs to support sustainable development will trigger a large additional power supply. Unfortunately, a current energy source is mostly produced by fossil fuels. This condition can affect the increase of global warming and climate change. Nowadays, many countries including Indonesia are aware of the effect of the use of fossil fuels on environmental devastation. Therefore, the use of clean energy gets more attention from many countries since its energy source is unlimited and harvested from nature. One of the clean energy sources that are widely utilized over the world is photovoltaic (PV). PV is an appropriate clean energy technology to be utilized in Indonesia since this country lies on the equator line and gets solar irradiance over the year. This paper proposed the design of PV systems for a public-school building. These PV schemes proposed in this study are classified into off-grid, on-grid, and hybrid PV systems. From the simulation results, it is shown that the hybrid PV system with energy supplied by PT. PLN (State Electricity Company) results in the highest saving annual cost and provides an environmentally friendly energy source for public-school buildings.

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Review on dew water effect on soiling of solar panels: Towards its enhancement or mitigation

Cited by 19 publications

References 65 publications

Roadmap to Advance Heliostat Technologies for Concentrating Solar-Thermal Power

Roadmap to Advance Heliostat Technologies for Concentrating Solar-Thermal Power

Waterless cleaning technique for photovoltaic panels on dual-axis tracker

Design of photovoltaic system for public school building

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