Solar concentrating method and device based on periodic microstructure

Abstract

The invention relates to a solar concentrating method and device based on a periodic microstructure, and particularly relates to a solar concentrator. The device comprises a transparent medium substrate and solar batteries, wherein a transparent thin film covers the upper surface of the transparent medium substrate; a periodic microstructure is prepared on the transparent thin film; and the solarbatteries are arranged on two sides of the transparent medium substrate, which are parallel to the direction of a grating slot line on the transparent thin film. When sunlight is incident to the transparent thin film of the solar concentrating device based on the periodic microstructure, the diffraction order with a diffraction angle exceeding the total reflection angle of the medium substrate spreads inside the medium substrate and finally arrives at the solar battery on the sidewalls of the medium substrate; and the diffraction order not forming the total reflection in the medium substrate and the zero order of the incident sunlight play the lighting role through the transparent medium substrate. The solar concentrating device has the advantages of small size, simple structure, low cost, no tracking, large receiving angle, high concentrating uniformity, and the like, and is particularly suitable for any buildings and vehicles with glass windows.

Description

technical field [0001] The invention relates to a solar concentrator, in particular to a solar concentrating method and device based on a periodic microstructure. Background technique [0002] In recent years, with the depletion of world energy and the seriousness of environmental pollution, solar photovoltaic power generation, as the most promising green energy technology to replace traditional fossil fuels, has been highly valued by countries all over the world. Solar energy has the advantages of being inexhaustible, inexhaustible, clean and pollution-free, etc. However, the density of solar energy reaching the surface is very low, and the power generation capacity of solar cells per unit area is very limited. Due to the high cost of solar cell materials currently used, the cost of photovoltaic systems that directly use solar cells to receive sunlight is high, making it difficult to popularize and apply. In order to reduce the cost, people started the research on concentr...

AI Technical Summary

Problems solved by technology

However, the fluorescent concentrator is limited by the properties of the pigment material. Under the irradiation of sunlight, the pigment is easily degraded, resulting in a decrease in fluorescence efficiency and a shortened life of the concentrator.

In addition, plexiglass is more expensive than ordinary glass, its hardness is poorer, and the surface is easy to scratch

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