Fresnel lens to concentrate solar energy for the photocatalytic decoloration and mineralization of orange II in aqueous solution

Chemosphere ◽  
2006 ◽  
Vol 65 (7) ◽  
pp. 1242-1248 ◽  
Author(s):  
J.M. Monteagudo ◽  
A. Durán
Keyword(s):  
Aqueous Solution ◽  
Solar Energy ◽  
Fresnel Lens ◽  
Orange Ii ◽  
Concentrate Solar Energy

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.

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.

scholarly journals Enhanced removal of acid orange II from aqueous solution by V and N co-doping TiO2-MWCNTs/γ-Al2O3 composite photocatalyst induced by pulsed discharge plasma

2020 ◽  
Author(s):  
Guangzhou Qu ◽  
Hui Wang ◽  
Xin Li ◽  
Tiecheng Wang ◽  
Zengqiang Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Discharge Plasma ◽  
Orange Ii ◽  
Pulsed Discharge ◽  
Composite Photocatalyst ◽  
Co Doping ◽  
Al2o3 Composite ◽  
Acid Orange Ii ◽  
Pulsed Discharge Plasma

Abstract This paper presents a study of V and N co-doping TiO2 embedding multi-walled carbon nanotubes (MWCNTs) supported on γ-Al2O3 pellet (V/N-TiO2-MWCNTs/γ-Al2O3) composite photocatalyst induced by pulsed discharge plasma to enhance the removal of Acid orange II (AO7) from aqueous solution. The photocatalytic activity of the V/N-TiO2-MWCNTs/γ-Al2O3 composite to AO7 removal induced by the pulsed discharge plasma was evaluated. The results indicate that the V/N-TiO2-MWCNTs/γ-Al2O3 composite possesses enhanced photocatalytic activity that facilitates the removal of AO7 compared with the TiO2-MWCNTs/γ-Al2O3 and TiO2/γ-Al2O3 composites. Almost 100% of AO7 is removed after 10 min under optimal conditions. The V0.10/N0.05-TiO2-MWCNTs/γ-Al2O3 photocatalyst exhibits the best removal effect for AO7. Analysis of the removal mechanism indicates that the enhancement of the removal of AO7 resulting from V and N co-doping causes TiO2 lattice distortion and introduces a new impurity energy level, which not only reduces the band gap of TiO2 but also inhibits the recombination of the pairs.

Photodecolourization of orange II with iron corrosion products and oxalic acid in aqueous solution

2012 ◽  
Vol 417-418 ◽  
pp. 253-258 ◽  
Author(s):  
Shouqiang Wei ◽  
Long Liu ◽  
Haibo Li ◽  
Jing Shi ◽  
Ying Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Oxalic Acid ◽  
Corrosion Products ◽  
Orange Ii ◽  
Iron Corrosion

Design and Construction of a Solar-Powered Fluidyne Test Bed

2011 ◽  
Author(s):  
Jackson W. Mason ◽  
James W. Stevens
Keyword(s):  
Solar Energy ◽  
Low Cost ◽  
Fresnel Lens ◽  
Primary Energy ◽  
Distinct Advantage ◽  
Test Bed ◽  
Capital Costs ◽  
Concentrated Solar Energy ◽  
Low Efficiency ◽  
Solar Powered

Liquid piston Stirling engines (sometimes termed “fluidynes”) have been studied extensively and applied in a variety of energy conversion applications. They are attractive for low capital costs and simplicity of construction. In addition, their operation as external combustion engines allows for flexibility in primary energy sources which is a distinct advantage when a low-cost or free source of heat can be paired with their minimal construction costs. Disadvantages of these devices include relatively low efficiency and low power density. A solar-powered fluidyne test bed was constructed and operated at the University of Colorado at Colorado Springs. This test bed was composed of a fluidyne engine which was constructed from copper pipe and plastic tubing along with temperature and pressure instrumentation. The system was designed to be powered by a Fresnel lens concentrating solar energy. The concentrated solar energy from the Fresnel lens provided ample power to operate the test bed, and tests were run in a wide variety of conditions. Indicated work of this unloaded engine was shown to agree well with a simple theoretical model of a Stirling cycle.

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