Theoretical Simulation of Optical Collector for Solar Optic Fiber Lighting System Based on Rotary Parabola Mirror

2013 ◽  
Vol 805-806 ◽  
pp. 110-113
Author(s):  
Ning Wang ◽  
Xiao Xia Li ◽  
Li Li
Keyword(s):  
Concentration Ratio ◽  
High Efficiency ◽  
Chromatic Aberration ◽  
High Light ◽  
Optic Fiber ◽  
Lighting System ◽  
Reflection Method ◽  
Low Loss ◽  
Theoretical Simulation ◽  
Light Concentration

The solar optical collector based on rotary parabola mirror for solar optic fiber lighting is discussed in this paper. By this reflection method, the chromatic aberration can be avoided. The performance of solar collecting and fiber coupling are simulated by Tracepro software. The results showed this system can collecting soar lights with high efficiency and has high light concentration ratio. The solar lights can be coupled into optic fiber with low loss. An interesting results is found that the concentration ratio decreased with the increased curvature ratio between ellipsoid surface and parabola surface.

Design and Evaluation of the Fresnel-Lens Based Solar Concentrator System Through a Statistical-Algorithmic Approach

2018 ◽  
Author(s):  
Hassan Qandil ◽  
Weihuan Zhao
Keyword(s):  
High Temperature ◽  
High Efficiency ◽  
Incident Light ◽  
Thermal Analyses ◽  
Solar Spectrum ◽  
Chromatic Aberration ◽  
Fresnel Lens ◽  
Optimum Number ◽  
Solar Concentrator ◽  
Receiver System

A novel non-imaging Fresnel-lens-based solar concentrator-receiver system has been investigated to achieve high-efficiency photon and heat outputs with minimized effect of chromatic aberrations. Two types of non-imaging Fresnel lenses, a spot-flat lens and a dome-shaped lens, are designed through a statistical algorithm incorporated in MATLAB. The algorithm optimizes the lens design via a statistical ray-tracing methodology of the incident light, considering the chromatic aberration of solar spectrum, the lens-receiver spacing and aperture sizes, and the optimum number of prism grooves. An equal-groove-width of the Poly-methyl-methacrylate (PMMA) prisms is adopted in the model. The main target is to maximize ray intensity on the receiver’s aperture, and therefore, achieve the highest possible heat flux and output concentration temperature. The algorithm outputs prism and system geometries of the Fresnel-lens concentrator. The lenses coupled with solar receivers are simulated by COMSOL Multiphysics. It combines both optical and thermal analyses for the lens and receiver to study the optimum lens structure for high solar flux output. The optimized solar concentrator-receiver system can be applied to various devices which require high temperature inputs, such as concentrated photovoltaics (CPV), high-temperature stirling engine, etc.

Low-Loss Paper Substrate for Printed High Efficiency Antennas at 2.45 GHz

2015 ◽  
Vol 14 ◽  
pp. 1400-1403 ◽  
Author(s):  
I. Kharrat ◽  
P. Xavier ◽  
T.-P. Vuong ◽  
J.-M. Duchamp ◽  
Ph. Benech ◽  
...  
Keyword(s):  
High Efficiency ◽  
Low Loss ◽  
Paper Substrate

A 3-position transmission/reflection method for measuring the permittivity of low loss materials

1995 ◽  
Vol 5 (1) ◽  
pp. 3-5 ◽  
Author(s):  
Kwang-Hyun Baek ◽  
He-Young Sung ◽  
Wee Sang Park
Keyword(s):  
Reflection Method ◽  
Low Loss

Evaluation of a Low-Cost Permanent Emergency Lighting System Based on High-Efficiency LEDs

2005 ◽  
Vol 41 (5) ◽  
pp. 1386-1390 ◽  
Author(s):  
M. Rico-Secades ◽  
A.J. Calleja ◽  
J. Ribas ◽  
E.L. Corominas ◽  
J.M. Alonso ◽  
...  
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Lighting System

scholarly journals Photovoltaic Concentration: Research and Development

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5721
Author(s):  
Sarah El Himer ◽  
Salima El Ayane ◽  
Sara El Yahyaoui ◽  
Jean Paul Salvestrini ◽  
Ali Ahaitouf
Keyword(s):  
Energy Source ◽  
Solar Cells ◽  
Research And Development ◽  
Concentration Ratio ◽  
Recent Progress ◽  
High Efficiency ◽  
Cost Effective ◽  
Optical Elements ◽  
Concise Overview

Concentrator Photovoltaic (CPV) technology, by using efficient optical elements, small sizes and high efficiency multi-junction solar cells, can be seen as a bright energy source to produce more cost-effective electricity. The main and basic idea is to replace the use of expensive solar cells with less expensive optical elements made from different materials. This paper aims to give to the readers a rapid and concise overview of CPV and the main characteristics to be considered when designing a CPV system. It reviews the main optical configurations presented in the literature, their advantages and drawbacks, as well as the recent progress in the concentration ratio and the major performances achieved in the field. The paper considers the more recent works, their optical designs, as well as their optical and electrical performances. It also relates the major achievements on the industrial side with the major milestones in CPV developments.

scholarly journals High-Efficiency SOI Fiber-to-Chip Grating Couplers and Low-Loss Waveguides for the Short-Wave Infrared

2012 ◽  
Vol 24 (17) ◽  
pp. 1536-1538 ◽  
Author(s):  
Nannicha Hattasan ◽  
Bart Kuyken ◽  
Francois Leo ◽  
Eva M. P. Ryckeboer ◽  
Diedrik Vermeulen ◽  
...  
Keyword(s):  
High Efficiency ◽  
Short Wave ◽  
Low Loss ◽  
Grating Couplers ◽  
Short Wave Infrared

Simulation and Design of Wireless Energy Transmission for Implantable Micro-Electromechanical Devices

2013 ◽  
Vol 765-767 ◽  
pp. 2345-2350
Author(s):  
Jian Chen ◽  
Lei Ma ◽  
Wei Zhang ◽  
Yao Li
Keyword(s):  
High Efficiency ◽  
Impedance Matching ◽  
Design Parameters ◽  
Wireless Power ◽  
Low Loss ◽  
Source Current ◽  
New Type ◽  
Electromechanical Devices ◽  
Topologic Structure ◽  
Class E

The purpose of this study is to describe a novel topologic technology for wireless power transmitting through external coils to multiple implantable micro-electromechanical devices inside the patient body, which is able to solve the dilemma of recharging. Wireless power transmitters are designed based on class π-type topologic structure, which improves existing Class-E power amplifier structure and impedance matching technology. Mathematical Models based on resonating chopper MOSFET and class π-type impedance matching network are introduced to optimize the design parameters. Together with proper capacitors and high-flux, low-loss inductors, an optimal wireless power transmitter with significant characteristics of high efficiency and low loss takes advantage of this brand new type of topologic structure. The author designed and developed the RF oscillator and the actual class E power resonant amplifier. During studies, with the 12V power supply, the voltage of 96.8V is generated on the 50ohm high-power RF load side, along with source current of 2.183A. The efficiency of the system reaches 89.4%, which satisfied the need for implantable micro-electromechanical device.

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