Optical collection efficiency and orientation of a solar trough medium-power plant installed in Italy

Sansoni, P.; Fontani, D.; Francini, F.; Giannuzzi, Alessandra; Sani, Elisa; Mercatelli, Luca; Jafrancesco, D.

doi:10.1016/j.renene.2011.02.004

Cited by 29 publications

(8 citation statements)

References 9 publications

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“…The optical collection can be oriented by reflection or refraction of solar radiation employing reflectors, refractive optics or combinations of mirrors and lenses. The orientation of a solar panel is an important factor in deploying a solar power plant [81], but selecting the right location and position still has great significance for getting maximum efficiency of the plant.…”

Section: B Solarmentioning

confidence: 99%

Placement Optimization for Renewable Energy Sources: Ontology, Tools, and Wake Models

et al. 2020

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Due to intermittent nature of renewable energy sources (RESs) and their strong dependence on various environmental factors, it is imperative to carefully deploy these sources. A survey of recent works published in the area of optimal deployment of RESs is presented in this article. The existing works are categorized according to the type of energy source, objective function and model of operation. An optimal mix of hybrid-RESs along with energy storage system (ESS) is presented as solution to overcome the randomness and inconstancy of a single RES such as wind or solar power. We outline mathematical formulations for different objective functions, i.e., minimization of cost, maximization of power generation, maximization of the average cosine efficiency and minimization of the distribution losses. We present different wake models and simulation tools being used for the wind form layout optimization. These simulation tools are used to grade particular RESs according to technical and financial feasibility. This review paper depicts multifaceted coverage of the subject to provide the readers with state of the art developments in the area and can serve as a foundation for further research in the area. In addition, it can be used to find optimal mix of RESs for particular geographical area to satisfy the energy demands of that particular area. INDEX TERMS Renewable energy, placement optimization, positioning, wake models.

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Section: B Solarmentioning

confidence: 99%

Placement Optimization for Renewable Energy Sources: Ontology, Tools, and Wake Models

et al. 2020

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“…Based on the soft-sphere model, the software EDEM was used as a simulation tool to study the contact force F b in this paper. The expression of F b is shown in Equation (4). It can be seen from Equation (4) that F b can be divided into two components, namely, the normal component force (F bn ) and the tangential component force (F bt ).…”

Section: Particle Motion Balancementioning

confidence: 99%

“…Meanwhile, all dust particles were uniformly spherical and did not have any change in shape during particle motion process. It can be known from the previous study that numerous dust particles are deposited on the solar mirror [1][2][3][4][5][6][7][8][9][10][11][12][13]. As a result, the performance and overall efficiency of the solar power plants will sharply decrease.…”

Section: Model Assumptions and Simulation Conditionsmentioning

confidence: 99%

“…Solar energy is considered to be one of most promising renewable energy sources for its availability (it is natural, abundant, and free) and cleanliness (it is free from emission and noise) [1]. The phenomenon of dust deposition on solar mirrors seriously affects reflectivity and transmittance, thus reducing the power generation of solar power plants [2][3][4][5]. Therefore, dust deposition on solar mirrors has attracted a great deal interest from many researchers.…”

Section: Introductionmentioning

confidence: 99%

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Study on Dust Deposition Mechanics on Solar Mirrors in a Solar Power Plant

Liu

Yue²,

et al. 2019

Energies

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Solar energy is considered to be one of most promising renewable energy sources because of its availability and cleanliness. The phenomenon of dust deposition on solar mirrors greatly reduces the power generation of solar power plants. In this work, the motion behaviors and deposition mechanics of dust particles are analyzed by the discrete element method (DEM). The effects of environmental and solar mirror conditions and particle self-factors on dust deposition weight are systematically studied here. The research results show that dust particles, after particle collision, immediately adhere to the mirror or rebound and finally flow away from the mirror, or they otherwise may remain stationary after making some relative motion. Alternatively, they may glide for some distance and finally come to rest on the mirror or leave from the system. Different motion behaviors after particle collision depend on different leading forces. Here, the leading forces are the liquid bridge force (Fc) and the contact force (Fb). When the leading forces are Fc, or Fc, and Fb, the dust particles will be deposited on the solar mirror. Besides, the force Fc cannot be negligible when studying the motion processes of dust particles. The dust deposition weight on solar mirrors can be controlled by altering the environmental and solar mirror conditions, and particle self-factors. In essence, dust deposition weight on solar mirrors decreases when decreasing the leading force Fc or increasing the leading force Fb. The research results give theoretical guidance for the prevention and removal of dust deposition on solar mirrors.

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“…The collector is provided with oneaxis solar tracking, usually the horizontal north-south axis, to ensure that the solar beam falls parallel to its axis and hence maintain a high efficiency [31,32]. Similarly, the cosine factor of parabolic trough solar concentrator with north-south axis tracking system also changes with time, and the mean annual cosine factor is smaller than 0.9, inferior to 0.95 of ATFMSC system and leading to the reduction of both intercept factor and optical performance of collector, the reason is: the northesouth axis tracking system is only able to track the sun in the transverse direction, but for the ATFMSC system, the solar azimuth is tracked, and the system inclination angle is adjusted to obtain better performance.…”

Section: Performance Comparison With the Parabolic Trough Collectormentioning

confidence: 99%

Performance analysis of Azimuth Tracking Fixed Mirror Solar Concentrator

et al. 2015

Renewable Energy

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a b s t r a c tThe fixed mirror solar collector (FMSC) fixes reflector and mobiles receiver to collect solar energy. However, this type of concentrator has a low efficiency and short operating duration in practical applications. In this paper, we propose to install the FMSC on an azimuth tracking device (ATFMSC) and the reflectors are arranged by intermission to avoid the shading of neighbor reflector for incidence angle of less than 10 to improve its optical performance. Through the integration of the reflected solar radiation distribution function over any reflection point, and then the whole collector aperture, we develop the analytical expressions of various system efficiencies to numerically simulate the performance of ATFMSC with evacuated tube receiver in different design parameters. It is validated by the ray tracing results. The result shows that the mean annual net heat efficiency of the whole system would be up to 61% with the operating temperature of 400 C, which is higher than parabolic trough collector and traditional FMSC. This is because the longitudinal incidence angle of ATFMSC always remains zero by tracking the sun azimuth, so the end loss of the concentrator can be avoided and enables it to operate with high efficiency continually.

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Optical collection efficiency and orientation of a solar trough medium-power plant installed in Italy

Cited by 29 publications

References 9 publications

Placement Optimization for Renewable Energy Sources: Ontology, Tools, and Wake Models

Placement Optimization for Renewable Energy Sources: Ontology, Tools, and Wake Models

Study on Dust Deposition Mechanics on Solar Mirrors in a Solar Power Plant

Performance analysis of Azimuth Tracking Fixed Mirror Solar Concentrator

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