Abstract
This paper presents an off-axis-focused solar concentrator system consisting of 190 aspheric reflectors, where the aperture radius of each reflector is 10 cm, and vertices of all reflectors are orderly arranged in the same plane. The aspheric parameters controlling the curvature of the reflectors are determined using coordinate transformations and the particle swarm optimization (PSO) algorithm. Based on these aspheric parameters, the light distribution of focal plane was calculated by the ray tracing method. The analyses show that the designed concentrator system has a spot radius of less than 1 cm and the concentration ratio over 3300:1 is achieved using only one reflection. The design results have been verified with the optical design software Zemax.
Highlights
Solar energy is often considered as one of the most viable renewable energy sources because it is unpolluted, abundant, and holds great promises for utilization and sustainable development in the near future [1,2]
In the case of solar thermal power generation, steam is generated and current is produced using the steam turbine, whereas in the case of solar PV power generation, solar radiation is directly converted into the electricity [3,4,5]
Based on our previous work [14], we designed an off-axis point focused solar concentrator system consisting of 190 aspheric reflectors by employing particle swarm optimization
Summary
Solar energy is often considered as one of the most viable renewable energy sources because it is unpolluted, abundant, and holds great promises for utilization and sustainable development in the near future [1,2]. Loni et al (2016) used parabolic dish concentrators to focus the sun-rays on the receiver for obtaining a high temperature of work fluid. They designed a cylindrical closed-tube open-cavity solar receiver in such a way to absorb the solar energy to the maximum extent [27]. To date, nobody has employed multiple aspheric reflectors to achieve a higher concentration ratio for off-axis point focusing. Based on our previous work [14], we designed an off-axis point focused solar concentrator system consisting of 190 aspheric reflectors by employing particle swarm optimization. PSO algorithm was successfully implemented for designing the laser beam shaping lenses and LED collimator in Reflector our recent works
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