Optimization of a Linear Fresnel Reflector Applying Computational Fluid Dynamics, Entropy Generation Rate and Evolutionary Programming

López-Núñez, Oscar A.; Alfaro-Ayala, J. Arturo; Ramírez-Minguela, J.J.; Belman-Flores, J.M.; Jaramillo, O.A.

doi:10.1016/j.renene.2020.01.105

Cited by 19 publications

(5 citation statements)

References 40 publications

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“…Then, the change in focal length at the tilted incidence was analysed mainly using simulation and experiments. In 2020, Lightz-Nunez et al [ 12 ] proposed a linear Fresnel reflector optimisation method based on computational fluid dynamics, entropy yield, and evolutionary planning methods. The objective function of the optimisation process considered the maximization of the absorbed radiant solar flux on the receiver tube and the minimization of the total entropy yield.…”

Section: Literature Reviewmentioning

confidence: 99%

Application of the NSGA-II Algorithm and Kriging Model to Optimise the Process Parameters for the Improvement of the Quality of Fresnel Lenses

et al. 2023

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The Fresnel lens is an optical system consisting of a series of concentric diamond grooves. One surface of the lens is smooth, while the other is engraved with concentric circles of increasing size. Optical interference, diffraction, and sensitivity to the angle of incidence are used to design the microstructure on the lens surface. The imaging of the optical surface depends on its curvature. By reducing the thickness of the lens, light can still be focused at the same focal point as with a thicker lens. Previously, lenses, including Fresnel lenses, were made of glass due to material limitations. However, the traditional grinding and polishing methods for making Fresnel lenses were not only time-consuming, but also labour-intensive. As a result, costs were high. Later, a thermal pressing process using metal moulds was invented. However, the high surface tension of glass caused some detailed parts to be deformed during the pressing process, resulting in unsatisfactory Fresnel lens performance. In addition, the complex manufacturing process and unstable processing accuracy hindered mass production. This resulted in high prices and limited applications for Fresnel lenses. These factors prevented the widespread use of early Fresnel lenses. In contrast, polymer materials offer advantages, such as low density, light weight, high strength-to-weight ratios, and corrosion resistance. They are also cost effective and available in a wide range of grades. Polymer materials have gradually replaced optical glass and other materials in the manufacture of micro-optical lenses and other miniaturised devices. Therefore, this study focuses on investigating the manufacturing parameters of Fresnel lenses in the injection moulding process. We compare the quality of products obtained by two-stage injection moulding, injection compression moulding, and IMD (in-mould decoration) techniques. The results show that the optimal method is IMD, which reduces the nodal displacement on the Fresnel lens surface and improves the transmission performance. To achieve this, we first establish a Kriging model to correlate the process parameters with optimisation objectives, mapping the design parameters and optimisation objectives. Based on the Kriging model, we integrate the NSGA-II algorithm with the predictive model to obtain the Pareto optimal solutions. By analysing the Pareto frontier, we identify the best process parameters. Finally, it is determined that the average nodal displacement on the Fresnel surface is 0.393 mm, at a holding pressure of 320.35 MPa and a melt temperature of 251.40 °C. Combined with IMD technology, product testing shows a transmittance of 95.43% and an optimisation rate of 59.64%.

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Section: Literature Reviewmentioning

confidence: 99%

Application of the NSGA-II Algorithm and Kriging Model to Optimise the Process Parameters for the Improvement of the Quality of Fresnel Lenses

et al. 2023

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“…The thermal simulation of a single battery is carried out based on COMSOL. In the simulation, the conjugate heat transfer interface and electrochemical interface of COMSOL are simulated by the onedimensional model of a single battery [19], and the three-dimensional model of li-on batteries is used to simulate the heat transfer process of batteries.…”

Section: Simulation Analysis Of Power Batteries 31 Thermal Simulation Of the Single Batterymentioning

confidence: 99%

CFD-Based Numerical Analysis of the Thermal Characteristics of an Electric Vehicle Power Battery

Wang¹,

Ma²

2022

Fluid Dynamics &Amp; Materials Processing

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“…11 shows the resultant radiation and temperature contours for the full field and receiver respectively. This model was subsequently used to optimize the linear Fresnel reflector, using the Evolutionary Programming method in order to maximise the absorbed radiation on the absorber tube and minimise the entropy generation rate (López-Núñez et al, 2020b). The optimum design increased the absorbed radiation by 2.48% and decreased the entropy generation rate by 20%, resulting in a thermal efficiency of 𝜂 0.28 and an exergy efficiency of 𝜂 0.047.…”

Section: Finite Volume Modelsmentioning

confidence: 99%

A review of linear Fresnel primary optical design methodologies

2021

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Optimization of a Linear Fresnel Reflector Applying Computational Fluid Dynamics, Entropy Generation Rate and Evolutionary Programming

Cited by 19 publications

References 40 publications

Application of the NSGA-II Algorithm and Kriging Model to Optimise the Process Parameters for the Improvement of the Quality of Fresnel Lenses

Application of the NSGA-II Algorithm and Kriging Model to Optimise the Process Parameters for the Improvement of the Quality of Fresnel Lenses

CFD-Based Numerical Analysis of the Thermal Characteristics of an Electric Vehicle Power Battery

A review of linear Fresnel primary optical design methodologies

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