Optical performance comparison of two receiver configurations for medium temperature Linear Fresnel Collectors

Montenon, Alaric; Santos, André Vitor de Albuquerque; Collares-Pereira, Manuel; Montagnino, Fabio Maria; Garofalo, Roberto P.; Papanicolas, Costas N.

doi:10.1016/j.solener.2022.05.029

Cited by 12 publications

(6 citation statements)

References 28 publications

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“…The Linear Fresnel collector (U-LEAF) of the Cyprus Institute is made of 288 tracking mirrors, covering a net area of 184 m 2 and a 32 m long receiver (see Figure 1). Two extensive ray-tracing studies to assess its performance have already been done, first in Tonatiuh [27] and second in Tonatiuh++ [20]. These two latter works were thus targeting the direct use for heat production: photons issued from the sun which impinge on the absorber after reflection(s).…”

Section: Ground Meshmentioning

confidence: 99%

“…This may lead to attenuation of heating by solar radiation in the summer, but also the loss of the heating benefit in the winter by solar rays. Tonatiuh++ software has been used as a continuation of [20]. The collector has been modelled with a meshed ground in unit squares of 1 m 2 underneath.…”

Section: Ground Meshmentioning

confidence: 99%

“…Extensive work has been documented in the academic literature about the optical efficiency of LFRs for decades, with the objective of increasing performance by harvesting the highest number of rays coming from the solar plane up to the absorber [14][15][16][17][18]. The current publication also concerns the U-LEAF LFR in Cyprus, which has also been the scope of ray-tracing studies in Tonatiuh [19] and Tonatiuh++ [20]. Thus, the common denominator of these studies is to increase the efficiency of the linear collector.…”

Section: Introductionmentioning

confidence: 99%

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Quantifying the Shading Effects of a Small Scale Rooftop Installed Linear Fresnel Reflector in Cyprus

Montenon,

Papakokkinos,

Ilia

2024

Preprint

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The Linear Fresnel Reflectors are a solar concentration technology that is versatile and can serve many industrial processes or thermal conditioning. Such collectors entail a certain footprint, generating shading on the surface where they are installed. This effect is rarely quantified but may play an indirect role on the surface below. When installed on a roof, the solar radiation heats the building less. In places where the annual heating demand is higher than the cooling demand, this constitutes an asset. However, this becomes a disadvantage when the cooling demand is higher annually than the heating demand. Essentially, the reduced solar radiation allows the growth of plants that would not grow without the shade provided by the collector. The present paper is a quantitative analysis of such shading based on the Linear Fresnel Reflector of the Cyprus Institute. The work was conducted using the Tonatiuh++ ray-tracing software to determine the annual radiation blocking. A total of four years of actual meteorological measurements were applied directly to the ray-tracing model.

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Section: Ground Meshmentioning

confidence: 99%

Section: Ground Meshmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quantifying the Shading Effects of a Small Scale Rooftop Installed Linear Fresnel Reflector in Cyprus

Montenon,

Papakokkinos,

Ilia

2024

Preprint

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“…A double-tube configuration (U-bent receiver) has also been adopted in order to enlarge the target, resulting in a further improvement in terms of intercepted radiation as well as a better hydraulic configuration (inlet and outlet of the hydraulic circuit placed on the same side). At first, the methodology was tested in the design of a receiver that could be integrated into the previous LFR collector without changes in the primary optics [98]. In the second stage, the NIO design strategy was applied to the design of totally new systems that would consider the geometrical constraints arising from the manufacturing strategies (i.e., mechanical bending and minimization of waste).…”

Section: Eni's Parabolic Trough Collector Csp3mentioning

confidence: 99%

Innovative Industrial Solutions for Improving the Technical/Economic Competitiveness of Concentrated Solar Power

Palladino,

Di Somma,

Cancro

et al. 2024

Energies

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The modernization, efficiency, and decarbonization of the energy supply systems are among the new challenges to be faced in the coming decades to achieve the targets and objectives dictated by European strategic policies. Despite the countless benefits related to renewable energy sources (RES) integration, this brings key challenges to the power system, such as the risk of imbalance between energy generation and demand, sudden changes in flows in transmission lines with a need for expensive and time-consuming upgrades, and the withdrawal of conventional generation systems with consequent demands for new solutions and innovation to support grid services. A potential solution to limit the huge intermittence and fluctuation in power generation from RES is Concentrated Solar Power (CSP) technology integrated with thermal energy storage. The aim of this paper is to discuss the potential benefits related to the use of CSP technology by presenting innovative industrial solutions developed in the Italian SOLARGRID Project, namely the hybridization of CSP–PV systems and the solar thermo-electric system developed by MAGALDI, the parabolic trough collector of Eni, and the new linear Fresnel reflector configuration of IDEA S.r.l. These plant and component solutions are developed for improving the technical performance of CSP technology and reducing the levelized cost of electricity, thereby fostering an effective and massive deployment and encouraging the creation of new business models.

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“…Another application for CSP technologies would be the production of process heat close to industrial sites. Thanks to its low cost [3] and adaptability [4][5][6], one good candidate is the linear Fresnel collector (LFC) technology.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Evaluation of Solar Receiver Heat Losses of a Commercial 9 MWe Linear Fresnel Power Plant

Montanet,

Rodat,

Falcoz

et al. 2023

Energies

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Evaluating the heat losses of linear Fresnel concentrator (LFC) receivers is crucial for determining plant efficiency and managing the flow rate in solar lines. This becomes particularly significant when operating in direct steam generation to manage the steam quality at the line outlet. In general, the LFC receiver heat losses are determined experimentally on prototype systems to control the inlet condition or numerically using 3D computational fluid dynamics models or 1D mathematical models. The originality of this work is in reporting the study of heat losses of a commercial 9 MWe solar Fresnel power plant without impacting its electricity production. The experimentally measured receiver’s linear heat losses were found to be well represented by a second-degree polynomial function of the difference between the inlet/outlet fluid temperature average and the ambient temperature. Finally, to express the strong influence of wind speed on the receiver heat losses, a 1D single-phase model was developed and adapted to include the current receiver degradation. To conclude, the model was validated by comparing the experimental and theoretical results. Based on this comparison, it can be concluded that the model accurately predicts experimental heat losses with an acceptable uncertainty of ±30%, regardless of the wind velocity.

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Optical performance comparison of two receiver configurations for medium temperature Linear Fresnel Collectors

Cited by 12 publications

References 28 publications

Quantifying the Shading Effects of a Small Scale Rooftop Installed Linear Fresnel Reflector in Cyprus

Quantifying the Shading Effects of a Small Scale Rooftop Installed Linear Fresnel Reflector in Cyprus

Innovative Industrial Solutions for Improving the Technical/Economic Competitiveness of Concentrated Solar Power

Experimental and Numerical Evaluation of Solar Receiver Heat Losses of a Commercial 9 MWe Linear Fresnel Power Plant

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