Article
Thermodynamics
Kai Liang, Heng Zhang, Haiping Chen, Dan Gao, Yang Liu
Summary: A new type of Annular Fresnel solar concentrator coupled with a circular Fresnel lens (AFSCFL) was developed in the study to improve solar collecting efficiency. Simulation studies and comparison experiments were conducted, showing that AFSCFL has higher thermal efficiency than AFSC under low solar radiation conditions.
Article
Energy & Fuels
Mohammad Alnajideen, Min Gao
Summary: A new configuration of V-trough solar concentrator, consisting of two conventional V-trough concentrators arranged in a cross, has been proposed to improve concentration ratio and angular response. Experimental results show a 40%-60% increase in concentration ratio compared to the conventional V-trough solar concentrator, with no significant reduction in optical efficiency and light uniformity. It has potential for low-cost and low concentration applications.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Energy & Fuels
Duc Tu Vu, Ngoc Hai Vu, Seoyong Shin, Thanh Tuan Pham
Summary: This article introduces a new optical device - cylindrical Fresnel lenses, historically used in lighthouse concentrators, for application in the field of concentrator photovoltaic. The solar concentrator has the ability to distribute focal points over an arc at any light incidence and has a high acceptance angle. Through simulation and experimentation, the convergence feature and current gain improvement of the new lens design were confirmed.
Article
Thermodynamics
Alexandre Bittencourt de Sa, Victor Cesar Pigozzo Filho, Lounes Tadrist, Julio Cesar Passos
Summary: This paper describes a set of iterative procedures developed in Matlab and Engineering Equation Solver, used to experimentally obtain the optical and heat loss characterization of a small-scale linear Fresnel concentrator. By using two different sets of experimental data, optical peak efficiency and heat losses were successfully obtained. The combination of different software allowed for a fast and easy-to-converge methodology.
Article
Construction & Building Technology
Zhiying Song, Jie Ji, Zhaomeng Li
Summary: The study investigates the combination of concentrated photovoltaics and direct-expansion solar-assisted heat pump, and finds that photovoltaic heat pump systems based on different concentrators show variations in electrical efficiency, coefficient of performance, and exergy efficiency.
ENERGY AND BUILDINGS
(2021)
Article
Green & Sustainable Science & Technology
Zongxian Duan, Wei An
Summary: The utilization of offset-axis mirrors in linear Fresnel micro-concentrators can significantly improve ground utilization ratio and efficiency, providing a more compact design compared to conventional central-axis mirrors. This approach shows a promising potential to enhance solar energy harvesting efficiency in building integrated PV/T applications.
Article
Construction & Building Technology
Daniel Valencia-Caballero, Ya-Brigitte Assoa, Werther Cambarau, Didier Therme, Asier Sanz, Francoise Burgun, Ivan Flores-Abascal, Eduardo Roman-Medina
Summary: This paper presents a novel low concentration PV skylight system that controls solar energy in different seasons, increasing electricity production and reducing heat in buildings. Through various tests, the system shows a significant increase in PV power output in summer and reduces cooling demand without significantly affecting daylighting in buildings. This solution has the potential to replace traditional non-photovoltaic glazing skylights and generate electricity in buildings.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Thermodynamics
Hesham I. Elqady, Essam M. Abo-Zahhad, Ali Radwan, A. H. El-Shazly, M. F. Elkady
Summary: The study investigated the impact of considering the headers in a double-layer microchannel heat sink coupled with concentrator photovoltaic systems, demonstrating the importance of including the header section in the numerical model for more accurate temperature profiles.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Hani Beltagy
Summary: This paper aims to develop a new shape of secondary reflector for Fresnel linear concentrator. Through parameter optimization, the optimal configuration of the secondary reflector and other elements has been determined, improving the efficiency of light utilization and energy collection.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Review
Thermodynamics
Ahmed H. Mohammed, Ahmed N. Shmroukh, Nouby M. Ghazaly, Abd Elnaby Kabeel
Summary: Clean water is becoming scarcer due to increasing demand, and desalination of seawater is seen as the solution. Solar-powered desalination devices, particularly solar stills, have garnered attention as a clean alternative. This article examines the progress and techniques for enhancing performance, efficiency, and water production in active solar stills equipped with solar concentrators, aiming to keep researchers and the scientific community informed of advancements in this field.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Energy & Fuels
Arnaud Joel Kinfack Leoga, Arnaud Ritou, Mathieu Blanchard, Lysandre Dirand, Yanis Prunier, Philippe St-Pierre, David Chuet, Philippe-Olivier Provost, Maite Volatier, Vincent Aimez, Gwenaelle Hamon, Abdelatif Jaouad, Christian Dubuc, Maxime Darnon
Summary: Microstructured antireflective coatings (ARCs) are effective solutions to reduce optical losses in concentrator photovoltaics' (CPV) modules. We tested a CPV module with a concentration factor of 250x, embedding solar cells with microstructured encapsulating ARC or solar cells with multilayer ARC as a reference. The module operated for one year in severe climatic conditions, and despite suboptimal module design, a monomodule efficiency of 29.7% at 900 W/m(2) was achieved with the microstructured encapsulating ARC.
IEEE JOURNAL OF PHOTOVOLTAICS
(2023)
Article
Green & Sustainable Science & Technology
Mayank Gupta, Atyant Bhatnagar, Atul Kumar Dubey, Virendra Kumar, Dalip Singh Mehta
Summary: This study proposes and demonstrates a system that combines large Fresnel lenses and segmented mirrors to efficiently concentrate sunlight without the need for mechanical sun tracking. The system is used for solar thermal power generation and efficient water heating. The angular position of the lenses is designed to maximize sunlight collection throughout the day. The system significantly enhances the efficiency of solar thermal systems by exposing the thermal receiver unit to both concentrated and direct sunlight. The results show that this system is highly efficient and useful for countries with abundant sunlight, contributing to sustainable development.
ENERGY FOR SUSTAINABLE DEVELOPMENT
(2022)
Article
Energy & Fuels
Hoang Vu, Ngoc Hai Vu, Seoyong Shin
Summary: Electric vehicles (EVs) and photovoltaics (PVs) are new technologies that will play an important role in the transportation industry over the next decade. In this research, a static concentrator photovoltaic system for EVs is proposed to increase efficiency and stability. This system, with a geometrical concentration ratio of 4x, can achieve 25% annual efficiency and is suitable for car roof application.
Article
Energy & Fuels
Leonardo Faustino Lacerda de Souza, Naum Fraidenraich, Chigueru Tiba, Jeffrey M. Gordon
Summary: The linear aplanatic Fresnel reflector (LAFR) is a novel optical design suitable for solar thermal power plants, combining a segmented primary reflector with a stationary secondary mirror and receiver. By eliminating geometric aberrations, it achieves high-efficiency light concentration and high intercept factors.
Article
Energy & Fuels
Leonardo F. L. de Souza, Naum Fraidenraich, Chigueru Tiba, Jeffrey M. Gordon
Summary: Linear Aplanatic Fresnel Reflectors (LAFRs) have been introduced as a new and viable dual-mirror solar concentrator. Analytic methods for all inherent optical losses in the LAFR have been presented, allowing rapid comparisons among a wide range of possible designs. The results show LAFR designs with higher intercept factor and higher concentration, surpassing the previously determined ones.
Article
Optics
Bharathwaj Narasimhan, Pablo Benitez, Juan C. Minano, Milena Nikolic, Dejan Grabovickic
Article
Optics
Hakon J. D. Johnsen, Juan C. Minano, Jan Torgersen
Summary: Line-focus solar concentrators have been limited by the 2D concentration limit, but we propose a new design principle that bypasses this limit and achieves higher concentration ratios. By combining the concepts of etendue squeezing and tracking integration, we demonstrate a design example and provide efficiency values under different design conditions. This design principle opens up the design space for high-concentration line-focus solar concentrators and allows for a reconsideration of the trade-off between concentration and acceptance angle.
Article
Optics
Pablo Benitez, Milena Nikolic, Juan C. Minano, Mithra Anand, Asuncion Santamaria
Summary: Second-order semi-aplanatism improves imaging quality, particularly for high aspect ratio sensors. Designing such optical devices involves the use of freeform surfaces and a specific algorithm.
Proceedings Paper
Optics
Hakon J. D. Johnsen, Juan C. Minano
Summary: Conventional line-focus solar concentrators are limited by the 2D concentration limit. By breaking the symmetry of these systems, it is possible to go beyond the 2D limit and achieve higher concentration ratios. 'Etendue rotation is one way to break this symmetry, and two new concentrator configurations are presented based on this insight.
NONIMAGING OPTICS: EFFICIENT DESIGN FOR ILLUMINATION AND SOLAR CONCENTRATION XVIII
(2022)
Proceedings Paper
Optics
Ruben Mohedano, P. Benitez, D. Grabovickic, P. Zamora, M. Nikolic, M. Buljan, J. C. Minano, E. Sanchez, J. Chaves, J. Lopez, E. Perez, J. Vilaplana, J. C. Gonzalez
Summary: This article introduces an optic called CLOVER that addresses the TTL issue in traditional VR headsets, reducing size by half while increasing FOV and angular resolution. It also shows recent advancements in upgraded versions of the optic that incorporate myopia and color correction to improve image quality and resolution and reduce the size of the precursor.
INTERNATIONAL OPTICAL DESIGN CONFERENCE 2021
(2021)
Proceedings Paper
Computer Science, Artificial Intelligence
R. Mohedano, P. Benitez, M. Nikolic, J. Chaves, J. C. Minano, D. Grabovickic, M. Buljan, P. Zamora
AI AND OPTICAL DATA SCIENCES
(2020)
Proceedings Paper
Optics
Simone Sorgato, Julio Chaves, Ruben Mohedano, Maikel Hernandez, Jose Blen, Dejan Grabovickic, Hugo Thienpont, Fabian Duerr
ILLUMINATION OPTICS V
(2018)
Proceedings Paper
Optics
Marina Buljan, Bharathwaj Narasimhan, Pablo Benitez, Juan Carlos Minano, Jesus Lopez, Dejan Grabovickic, Milena Nikolic, Eduardo Perez, Jorge Gorospe, Eduardo Sanchez, Juan Carlos Gonzalez, Pablo Zamora, Ruben Mohedano
DIGITAL OPTICS FOR IMMERSIVE DISPLAYS
(2018)
Proceedings Paper
Education, Scientific Disciplines
Ignacio Moreno, Maria J. Yzuel, Maria L. Calvo
OPTICS EDUCATION AND OUTREACH V
(2018)
Proceedings Paper
Optics
J. C. Minano, P. Benitez, D. Grabovickic, B. Narasimhan, M. Nikolic, J. Infante
INTERNATIONAL OPTICAL DESIGN CONFERENCE 2017
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Juan C. Minano, Pablo Benitez, Dejan Grabovickic, Pablo Zamora, Marina Buljan, Bharathwaj Narasimhan
DIGITAL OPTICAL TECHNOLOGIES 2017
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Dejan Grabovickic, Pablo Benitez, Juan C. Minano, Pablo Zamora, Marina Buljan, Bharathwaj Narasimhan, Milena I. Nikolic, Jesus Lopez, Jorge Gorospe, Eduardo Sanchez, Carmen Lastres, Ruben Mohedano
DIGITAL OPTICAL TECHNOLOGIES 2017
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Pablo Benitez, Juan C. Minano, Pablo Zamora, Dejan Grabovickic, Marina Buljan, Bharathwaj Narasimhan, Jorge Gorospe, Jesos Lopez, Milena Nikolic, Eduardo Sanchez, Carmen Lastres, Ruben Mohedano
DIGITAL OPTICAL TECHNOLOGIES 2017
(2017)
