Concentrated solar light for rapid crystallization of nanomaterials and extreme enhancement of photoelectrochemical performance

2018 ◽  
Vol 54 (19) ◽  
pp. 2373-2376 ◽  
Author(s):  
Yina Zhao ◽  
Beilei Qiu ◽  
Zhonghai Zhang
Keyword(s):  
Solar Energy ◽  
Energy Input ◽  
Fresnel Lens ◽  
Solar Light ◽  
Photoelectrochemical Performance ◽  
Rapid Crystallization

A concentrated solar light annealing strategy is proposed with a Fresnel lens as the concentrator for rapid and effective crystallization of nanomaterials, and all energy input comes from renewable solar energy as the source.

scholarly journals Experimental Investigation on the Feasibility of Using a Fresnel Lens as a Solar-Energy Collection System for Enhancing On-Orbit Power Generation Performance

2017 ◽  
Vol 2017 ◽  
pp. 1-13
Author(s):  
Tae-Yong Park ◽  
Joo-Yong Jung ◽  
Hyun-Ung Oh
Keyword(s):  
Power Generation ◽  
Solar Energy ◽  
Attitude Control ◽  
Incidence Angle ◽  
Fresnel Lens ◽  
Power Measurement ◽  
The Sun ◽  
Solar Panels ◽  
Collection System ◽  
Power Generation Performance

Cube satellites have a limitation for generating power because of their cubic structure and extremely small size. In addition, the incidence angle between the sun and the solar panels continuously varies owing to the revolution and rotation of the satellite according to the attitude control strategy. This angle is an important parameter for determining the power generation performance of the cube satellite. In this study, we performed an experimental feasibility study that uses a Fresnel lens as a solar-energy collection system for cube satellite applications, so that the power generation efficiency can be enhanced under the worst incidence angle condition between the sun and solar panels by concentrating and redirecting solar energy onto the solar panels with a commercial Fresnel lens. To verify the effectiveness of the proposed system, we conducted a power-measurement test using a solar simulator and Fresnel lenses at various angles to the light source. In addition, we predicted the on-orbit power-generation enhancement achieved by employing the solar-energy collection system with various attitude control strategies.

A direct Z-scheme PtS2/arsenene van der Waals heterostructure with high photocatalytic water splitting efficiency

Nanoscale ◽  
2020 ◽  
Vol 12 (33) ◽  
pp. 17281-17289 ◽  
Author(s):  
Kai Ren ◽  
Wencheng Tang ◽  
Minglei Sun ◽  
Yongqing Cai ◽  
Yuan Cheng ◽  
...  
Keyword(s):  
Solar Energy ◽  
Water Splitting ◽  
Energy Input ◽  
Van Der Waals ◽  
Environmental Issues ◽  
Great Promise ◽  
Photocatalytic Water Splitting ◽  
Van Der Waals Heterostructure

To overcome current serious energy and environmental issues, photocatalytic water splitting holds great promise because it requires only solar energy as an energy input to produce hydrogen.

Simulation on Solar Energy Collection to Power a Thermoacoustic Prime Mover Using Pressurized Hot Steam

2011 ◽  
Author(s):  
Ikhsan Setiawan ◽  
Makoto Nohtomi ◽  
Masafumi Katsuta
Keyword(s):  
Solar Energy ◽  
Global Radiation ◽  
Average Energy ◽  
Steam Pressure ◽  
Fresnel Lens ◽  
Water Volume ◽  
Prime Mover ◽  
Simple Simulation ◽  
Solar Global Radiation ◽  
Yogyakarta City

It has been performed a simple simulation and calculation on solar energy collection which is used indirectly to power a thermoacoustic prime mover by producing pressurized hot steam which would supply thermal energy to the prime mover via sealed-off hot heat exchangers. The solar energy collection took place in Yogyakarta City - Indonesia where the average energy of solar global radiation of 4.8 kWh/m2/day (17.3MJ/m2/day) is available around the year. The calculation including the amount of the remaining heat stored, steam pressure, and steam temperature for various areas of the collector unit (Fresnel lens) and volume of water, were done as a function of time for several days. We found that appropriate combinations of lens area and water volume would enable us to operate the thermoacoustic prime mover continuously all day and night.

Spectral Transmission of a Solar Collector and Fiber Optic Distribution Hybrid Lighting System

2007 ◽  
Author(s):  
L. C. Maxey ◽  
J. E. Parks ◽  
D. L. Beshears ◽  
D. D. Earl ◽  
M. V. Lapsa ◽  
...  
Keyword(s):  
Solar Energy ◽  
Hybrid System ◽  
Solar Collector ◽  
Fiber Optic ◽  
Renewable Energy Sources ◽  
Solar Spectrum ◽  
Solar Light ◽  
Spectral Transmission ◽  
Lighting System ◽  
Nir Light

Increased use of solar energy will reduce requirements for non-renewable energy sources such as fossil fuels and reduce associated greenhouse gas emissions. The benefits of replacing fossil-based energy with solar energy are often dependent on the application and operational or duty cycle for power demand. One particularly efficient use of solar energy is hybrid lighting. In hybrid lighting, solar light is concentrated into optical fibers and then coupled with supplemental electrical lighting to maintain a constant level of illumination. The system is able to offer reliable lighting with less energy consumption from the electrical grid (which is often driven by non-renewable sources). This technique offers energy efficiency benefits since the solar light is used directly and suffers no conversion losses. Furthermore, the solar spectrum provides an illumination that lighting engineers value for it’s quality; office inhabitants appreciate for its comfort; and retailers believe leads to increased sales. When available solar light is low, the hybrid system allows traditional light sources to reliably meet lighting demands. The success of the solar hybrid lighting system is dependent on the collection and transmission efficiency of the system. In this study, the spectral transmission of a hybrid lighting system is characterized. The system is composed of a 200-sun concentration reflective solar collector and a plastic fiber optic distribution network. The ultraviolet (UV), visible, and near-infrared (NIR) spectral transmission was characterized over a spectral range of 200 nm to 2400 nm. The UV and NIR performance of the system is critical since optical fiber damage can be caused by both UV and NIR light; thus, optimal system design maximizes the collection and transmission of visible light while minimizing the transmission of the UV and NIR light. Spectral transmission data for all components in the hybrid system are presented, and performance properties relative to solar applications are discussed.

scholarly journals Ideal shape of Fresnel lens for visible solar light concentration

2020 ◽  
Vol 28 (12) ◽  
pp. 18141
Author(s):  
Xinglong Ma ◽  
Rihui Jin ◽  
Shen Liang ◽  
Hongfei Zheng
Keyword(s):  
Fresnel Lens ◽  
Solar Light ◽  
Light Concentration

scholarly journals Tungsten oxide-based visible light-driven photocatalysts: crystal and electronic structures and strategies for photocatalytic efficiency enhancement

2020 ◽  
Vol 7 (4) ◽  
pp. 817-838 ◽  
Author(s):  
Haiqin Quan ◽  
Yanfeng Gao ◽  
Wenzhong Wang
Keyword(s):  
Visible Light ◽  
Tungsten Oxide ◽  
Electronic Structures ◽  
Energy Input ◽  
High Potential ◽  
Solar Light ◽  
Photocatalytic Efficiency ◽  
Efficiency Enhancement ◽  
Visible Light Driven ◽  
Energy Issues

Photocatalysis (PC) technology has received global attention due to its high potential of addressing both environmental and energy issues using only solar light as energy input.

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