A brief review of solar concentrators

De, D. K.; Olawole, C. Olukunle

doi:10.1109/energyeconomics.2015.7235082

Cited by 7 publications

(3 citation statements)

References 54 publications

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“…Generations of electrical energy from the conventional fuels being listed above are still facing challenges till date. Because, supplies are extravagantly high, quickly depleting, and politically controlled, it is highly improbable that they will be used extensively in nations without abundant domestic reserves [6,7].…”

Section: Introductionmentioning

confidence: 99%

Alternative to excessive consumption of fossil fuels in Nigeria: a case of solar energy system

Adagunodo

Adeniji

Ajao

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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In both affluent and developing countries, electricity serves as the focal point for all developmental initiatives. Alternative sources of energy must be found in order to ensure a reliable supply of clean energy for everyone as the world, and Nigeria in particular, are facing impending shortage of fossil fuels, most immediately oil, which has created a significant gap between energy demand and supply due to insufficient local production. In this article, the potential for solar energy to increase Nigeria’s energy supply is discussed. Sunlight, a renewable, non-depleting energy source, generates solar energy. The quantity of solar Energy being received by the Earth hourly is abundant to supply the required energy on annual basis. Due to the constant demand for power in our present age, solar energy is incredibly effective and pollution-free. As a result, in this regard, solar energy and its potential to improve Nigeria’s energy supply as well as its future trends are discussed. The article is aimed to cover several uses and strategies for promoting solar energy in our society: Nigeria as a case study.

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Section: Introductionmentioning

confidence: 99%

Alternative to excessive consumption of fossil fuels in Nigeria: a case of solar energy system

Adagunodo

Adeniji

Ajao

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…There are some distinct designs of solar concentrators that have shown importance Contribution to solar energy [3]. The most novel design of solar concentrators is the compound parabolic concentrators (CPC)divided into two types namely: 2-dimensionaland 3-dimensional configuration [4]. The efficiency of acceptance of diffuse radiation in this type is the greatest compared to other solar concentrates(CPC) which is a non-imaging concentrator and that which consists of two parabolas.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Evaluation of Solar Concentrator without Tracking System Type of Compound Parabolic Concentrator (CPC)

Rusul¹,

Alaa²

2021

IHJPAS

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It is useful to analyze any optical system theoretically before proceeding with its design in order to ensure the effectiveness of the design through computer simulations that are important and useful in designs for the ability to predict the performance of solar concentrator under any conditions. For this design, non-sequential ray tracing mode wasused in the Zimax program with a light source that simulated solar radiation. The purpose of the design of a compound parabolic concentrator (CPC) is to take advantage of the solar radiation that falls on it without the need for an efficiently tracked system within certain limits of the angle of solar radiation fall known as the acceptance angle. That is, obtaining the largest possible number of rays received inside the CPC through reflections in the inner walls of it, which give a large amount of thermal energy to the surface of the recipient, which in turn gets this energy to be used to create electrical energy. The efficiency of receiving reflected solar radiation in this type of concentrator is great compared to other solar concentrators. Simulated design of solar reflector concentrator has been presented. The concentrator is a type of compound parabolic concentrator (CPC) involved of internal reflector surface (Hollow and within Poly methyl methacrylate (PMMA) polymer material) without tracking system. CPC has the property to overcome problems result from variation of incidence angle of the sun during daytime. Because the tracking system expensive and has technical problems. The efficiency of CPC has been obtained by using Zemax optical design program, for different designs has concentration ratio(c=1,2,3,4,5). That is, the ratio of the output aperture to the input aperture. Taking into account the angle of acceptance that plays a major role in the form of design and its efficiency the results are shown when designing the model with radial aperture of (50mm) and length of (500mm).The design of concentrations ratio is depends on the acceptance angle. c=5 at normal incident angle (ÆŸ=0). And it is almost similar if the material is used PMMA within CPC, and degradation of efficiency with increasing the incidence angle.

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“…18 A parabolic concentrator of diameter ∼2.6 ft. costs around $200. One day with the advent of technology it is expected that a large-sized parabolic mirror (imaging type) of diameter 4 to 6 m can be purchased at a cost of around $1500 to $2000.…”

Section: New Development In Thermionic Energy Conversionmentioning

confidence: 99%

Theoretical studies of thermionic conversion of solar energy with graphene as emitter and collector

Olawole

2018

J. Photon. Energy

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, "Theoretical studies of thermionic conversion of solar energy with graphene as emitter and collector," J. Photon. Energy 8(1), 018001 (2018), doi: 10.1117/1.JPE.8.018001. Abstract. Thermionic energy conversion (TEC) using nanomaterials is an emerging field of research. It is known that graphene can withstand temperatures as high as 4600 K in vacuum, and it has been shown that its work function can be engineered from a high value (for monolayer/ bilayer) of 4.6 eV to as low as 0.7 eV. Such attractive electronic properties (e.g., good electrical conductivity and high dielectric constant) make engineered graphene a good candidate as an emitter and collector in a thermionic energy converter for harnessing solar energy efficiently. We have used a modified Richardson-Dushman equation and have adopted a model where the collector temperature could be controlled through heat extraction in a calculated amount and a magnet can be attached on the back surface of the collector for future control of the spacecharge effect. Our work shows that the efficiency of solar energy conversion also depends on power density falling on the emitter surface, and that a power conversion efficiency of graphenebased solar TEC as high as 55% can be easily achieved (in the absence of the space-charge effect) through proper choice of work functions, collector temperature, and emissivity of emitter surfaces. Such solar energy conversion would reduce our dependence on silicon solar panels and offers great potential for future renewable energy utilization. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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A brief review of solar concentrators

Cited by 7 publications

References 54 publications

Alternative to excessive consumption of fossil fuels in Nigeria: a case of solar energy system

Alternative to excessive consumption of fossil fuels in Nigeria: a case of solar energy system

Efficiency Evaluation of Solar Concentrator without Tracking System Type of Compound Parabolic Concentrator (CPC)

Theoretical studies of thermionic conversion of solar energy with graphene as emitter and collector

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