CSP performance and yield analysis including soiling measurements for Morocco and Portugal

Merrouni, Ahmed Alami; Conceição, Ricardo; Mouaky, Ammar; Silva, Hugo; Ghennioui, Abdellatif

doi:10.1016/j.renene.2020.10.014

Cited by 29 publications

(6 citation statements)

References 31 publications

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“…53 In this context, A.A. Merrouni et al have conducted a real study about the soiling effect on CSP plants of Morocco and Portugal in terms of thermal performance, power generation, and LCOE. 54 The findings revealed that Morocco is more affected by dust and dirt accumulation compared with Portugal, with an average daily soiling rate of almost 1.6% and 0.06%, respectively. The results also demonstrated that both countries are suitable for CSP installation.…”

Section: Introductionmentioning

confidence: 92%

Soiling impact and cleaning techniques for optimizing photovoltaic and concentrated solar power power production: A state-of-the-art review

Benyadry,

Halimi,

Khouya

2024

Energy & Environment

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Nowadays, renewable energies are capturing the world's attention, particularly in light of the phenomenon of climate change and carbon dioxide emissions, which have caused major environmental damage. As a result, many investors have recently focused on developing investments in renewable energy projects worldwide, specifically photovoltaic and concentrated solar power plant projects. These solar technologies are considered among the most profitable solutions for generating power from a natural, free, and unlimited energy source. This review paper discusses one of the most significant issues affecting the performance of these solar systems, which is known as soiling. It has been supported by several studies in various nations with different climatic conditions, which offered accurate empirical data on the degradation rate of photovoltaic and concentrated solar power systems’ production due to the soiling effect. Furthermore, it provides various mitigating soiling ways, including manual and autonomous cleaning methods for both solar technologies. Ultimately, it summarizes each cleaning technique's main advantages and drawbacks, specifying its applicability according to the location characteristics and climatic conditions. Additionally, the review results reported in this work are intriguing enough to warrant further development of concentrated solar power and photovoltaic technologies.

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Section: Introductionmentioning

confidence: 92%

Soiling impact and cleaning techniques for optimizing photovoltaic and concentrated solar power power production: A state-of-the-art review

Benyadry,

Halimi,

Khouya

2024

Energy & Environment

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“…One of the key reasons for degradation is the loss of reflectance due to the accumulation of dust on the surface of the heliostats. Reports have indicated that these soiling losses can vary significantly from site to site-from a few tenths of a percentage point to a few percentage points per day, depending on the site characteristics [157], [158]. These losses have led CSP operators to periodically clean heliostats using a number of different cleaning apparatus [159], but these operations can be expensive and have been identified as a key opportunity to reduce costs [160].…”

Section: Gap Analysis and Recommended Pathwaysmentioning

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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“…In addition to natural dust, bird droppings contribute to the soiling of solar mirrors as well and result in serious reflectivity drops [64,65], the losses in the overall performance might even reach 60% [67]. The severity of the losses due to bird droppings makes them comparable to major soiling losses such as localized dust deposition and red rain events [48,49].…”

Section: Figmentioning

confidence: 99%

“…The consideration of soiling when modeling the performance of CSP plants resulted in considerable losses of the yielded energy [48]. The weight of the deposited dust can also be used to develop correlations of reflectivity losses [64][65][66][67].…”

Section: Figmentioning

confidence: 99%

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Dust impact on concentrated solar power: A review

Zereg

Gama

Aksas³

et al. 2021

Environmental Engineering Research

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Many sites with high solar radiation face high dust loads that reduce energy generation by concentrated solar power plants. This review presents the attenuative impacts of atmospheric aerosols, as well as reflectivity losses due to soiling of solar reflectors, by covering both experimental investigations and numerical studies; along with presenting the theoretical background. The chemical nature of aerosols, and the physics of soiling and atmospheric extinction phenomena (scattering and absorption) are also reviewed. Suspended particles like aerosols result in atmospheric extinction of the solar radiation that reaches the concentrators, and the deposition of these particles on the solar reflectors provokes decreases up to 80% in their reflectivity, and thus enhances the cumulus of optical losses and the reduction of energy production. Even though dust affects both CSP and photovoltaics, CSP technologies suffer more losses. The impact of dust should be particularly considered during the planning phase of solar thermal plants, since its consequent reduction in energy output can be severe. While there have been multiple papers to review dust-related problems for PV, the present paper is the first literature review dedicated to the impact of soiling on concentrated solar power.

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CSP performance and yield analysis including soiling measurements for Morocco and Portugal

Cited by 29 publications

References 31 publications

Soiling impact and cleaning techniques for optimizing photovoltaic and concentrated solar power power production: A state-of-the-art review

Soiling impact and cleaning techniques for optimizing photovoltaic and concentrated solar power power production: A state-of-the-art review

Roadmap to Advance Heliostat Technologies for Concentrating Solar-Thermal Power

Dust impact on concentrated solar power: A review

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