Abstract
In this paper, a solar concentrator is designed in the form of a concave half-cylindrical mirror consisting of polygonal reflective surface plates. The plates are arranged to give a hemispherical shape to the design. These surfaces work to receive solar radiation and focusing by reflecting it to the receiver that is placed in front of the reflecting surfaces. The results are compared with a system consisting of a concave reflecting surface of the same dimensions to obtain a good criterion for evaluating the design performance. The results showed a low acceptance angle for the design for all the samples used due to the geometrical design nature. The optical efficiency affected by the angle of incidence greatly by all the samples used, which differ in the concentration ratio, width and location of the receiver.
Highlights
The idea of using solar concentrators is very vital in our time, because of the necessity to use renewable energy sources that are alternative to traditional sources,and reduce the effects of using fossil fuels from pollution and global warming
Solar concentrators are very important in increasing the efficiency of solar systems by increasing the amount of radiation received and reducing the effective area in proportion to the size of the solar system used
Sci. 34(4)2021 The results show a variation in the values of optical efficiency when the design parameters changed, and this indicates its role in affecting the efficiency of the system performance
Summary
The idea of using solar concentrators is very vital in our time, because of the necessity to use renewable energy sources that are alternative to traditional sources,and reduce the effects of using fossil fuels from pollution and global warming. The design does not require a solar tracker because it is designed to receive and reflect an appropriate amount of solar radiation with a relatively large acceptance angle. This means obtaining relatively large optical efficiency over a wide range of solar incidence on the design [2].
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