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Energies
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Challenge and Research Trends of Solar Concentrators II
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Challenge and Research Trends of Solar Concentrators II

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A2: Solar Energy and Photovoltaic Systems".

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 2611

Special Issue Editors

Dr. Dawei Liang

E-Mail Website
Guest Editor
Department of Physics, NOVA University of Lisbon, 2829-516 Caparica, Portugal
Interests: solid-state lasers; solar power concentration; optics and lasers
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Changming Zhao

E-Mail Website
Guest Editor
School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China
Interests: solar-pumped lasers; solar concentrators; solar furnace; optics
Special Issues, Collections and Topics in MDPI journals
Dr. Joana Almeida

E-Mail Website
Guest Editor
Centro de Física e Investigação Tecnológica (CEFITEC), Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
Interests: solar-pumped lasers; Nd:Yag; solar concentrators; Solar energy
Dr. Claudia R. Vistas

E-Mail Website
Guest Editor
Centro de Física e Investigação Tecnológica (CEFITEC), Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
Interests: solar-pumped Lasers; Nd:Yag; solar

Special Issue Information

Dear Colleagues,

As the most abundant renew energy resource, solar energy has attracted interest from scientists all over the world. In order to increase its efficient use, solar concentrators maximizing sun power density are widely used in solar energy research and applications. New progress in solar concentrators is of vital importance for further breakthroughs in the following and many other research areas:

  1. Solar CPV electricity generation;
  2. Solar fuel production of H2, syngas, liquid, and gas hydrocarbons;
  3. Cycles for chemical storage of solar energy with ZnO, CeO2, iron, and silica;
  4. High added-value material synthesis and/or coating deposits of nanomaterials, new ceramics or metals, foams, catalytic layers;
  5. High-flux photochemistry and photophysics;
  6. Characterization of materials’ behavior and properties under extreme conditions;
  7. Solar pumping of laser for industrial and space applications.

Challenge and research trends of both primary and secondary solar concentrators are key issues for advanced solar energy research. Therefore, the topics of interest include but are not limited to:

  1. Primary solar concentrators
    Parabolic solar concentrators, flat Fresnel lenses, dome-shaped Fresnel lenses, ring array concentrators (RACs), and three-dimensional ring array concentrators (3D RACs).
  1. Secondary imaging and non-imaging concentrators
    Fused silica aspheric lenses, dielectric totally internally reflecting secondary concentrators (DTIRCs), fused silica liquid light guide lenses, two-dimensional compound parabolic concentrators (2D-CPCs), three-dimensional compound parabolic concentrators (3D-CPCs).
  1. Emerging solar concentrators
    Microcompound parabolic concentrators; maximizing the efficiency of luminescent solar concentrators by implanting resonant plasmonic nanostructures; enhancing light conversion efficiency in a luminescent solar concentrator using a prism film; polygonal luminescent waveguides; freeform RXI optics; holographic elements for spectrum-splitting PV systems; 3D-printed concentrators for tracking-integrated CPV modules; freeform waveguides for solar concentrated PV technology; spectrum splitting CSP/CPV collectors with InGaP/GaAs solar cells; new luminescent solar concentrators.
  1. Solar-pumped lasers with secondary and tertiary concentrators.
    Nd:YAG solar-pumped lasers, Ce:Nd:YAG solar-pumped lasers; novel solar laser pumping approaches with solar concentrators; solar laser applications.

Dr. Dawei Liang
Prof. Dr. Changming Zhao
Dr. Joana Almeida
Dr. Claudia R. Vistas
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • primary solar concentrators
  • secondary concentrators
  • high solar flux
  • fresnel lens
  • solar-pumped lasers

Published Papers (2 papers)

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Research

11 pages, 2965 KiB  
Article
High Brightness Ce:Nd:YAG Solar Laser Pumping Approach with 22.9 W/m2 TEM00-Mode Collection Efficiency
by Cláudia R. Vistas, Dawei Liang, Hugo Costa, Miguel Catela, Dário Garcia, Bruno D. Tibúrcio and Joana Almeida
Energies 2023, 16(13), 5143; https://doi.org/10.3390/en16135143 - 03 Jul 2023
Cited by 1 | Viewed by 1052
Abstract
A compact side-pumped solar laser design using a Ce:Nd:YAG laser medium is here proposed to improve the TEM00-mode solar laser output performance, more specifically the beam brightness. The solar laser performance of the Ce:Nd:YAG laser head was numerically studied by both [...] Read more.
A compact side-pumped solar laser design using a Ce:Nd:YAG laser medium is here proposed to improve the TEM00-mode solar laser output performance, more specifically the beam brightness. The solar laser performance of the Ce:Nd:YAG laser head was numerically studied by both ZEMAX® v13 and LASCADTM v1 software. Maximum multimode laser power of 99.5 W was computed for the 4.1 mm diameter, 34 mm length grooved rod, corresponding to a collection efficiency of 33.2 W/m2. To extract TEM00-mode solar laser, symmetric and asymmetric optical resonators were investigated. For the 4.1 mm diameter, 34 mm length grooved rod, maximum TEM00-mode solar laser collection efficiency of 22.9 W/m2 and brightness figure of merit of 62.4 W were computed using the symmetric optical resonator. While, for the asymmetric optical resonator, the maximum fundamental mode solar laser collection efficiency of 16.1 W/m2 and brightness figure of merit of 37.3 W were numerically achieved. The asymmetric resonator offered a TEM00-mode laser power lower than the one obtained using the symmetric resonator; however, a collimated laser beam was extracted from the asymmetric resonator, unlike the divergent TEM00-mode laser beam provided by the symmetric resonator. Nevertheless, using both optical resonators, the TEM00-mode Ce:Nd:YAG solar laser power and beam brightness figure of merit were significantly higher than the numerical values obtained by the previous Nd:YAG solar laser considering the same primary concentrator. Full article
(This article belongs to the Special Issue Challenge and Research Trends of Solar Concentrators II)
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16 pages, 7057 KiB  
Article
Seven-Rod Pumping Concept for Highly Stable Solar Laser Emission
by Hugo Costa, Dawei Liang, Joana Almeida, Miguel Catela, Dário Garcia, Bruno D. Tibúrcio and Cláudia R. Vistas
Energies 2022, 15(23), 9140; https://doi.org/10.3390/en15239140 - 02 Dec 2022
Cited by 6 | Viewed by 1162
Abstract
A seven-rod solar laser head was conceptualized and numerically studied to improve the tracking error compensation capacity and power stability in end-side-pumping schemes. It was composed of a first-stage heliostat–parabolic mirror system, a second-stage fused silica aspheric lens and a third-stage conical pumping [...] Read more.
A seven-rod solar laser head was conceptualized and numerically studied to improve the tracking error compensation capacity and power stability in end-side-pumping schemes. It was composed of a first-stage heliostat–parabolic mirror system, a second-stage fused silica aspheric lens and a third-stage conical pumping cavity, within which seven Nd:YAG rods were mounted. Highly stable solar laser emission, with a power loss inferior to 5% for tracking errors up to ±0.4°, could potentially be enabled with seven 4 mm diameter, 13 mm length rods. The tracking error width at 10% laser power loss was about 1.0°, which is 1.65 times higher than the experimental record, attained by a dual-rod side-pumping prototype. Furthermore, a total multimode laser power of about 41.2 W could also be achieved, corresponding to 23.3 W/m2 collection and 2.5% solar-to-laser power conversion efficiencies, which are 1.65 and 1.36 times higher than those obtained with the dual-rod side-pumping prototype. They are also 1.27 and 1.12 times higher than the multirod experimental records in multimode regime for the same rod material. Full article
(This article belongs to the Special Issue Challenge and Research Trends of Solar Concentrators II)
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