High Concentration Photovoltaic Power Generation Cogeneration System and Its Component Structure

Abstract

The invention discloses a high concentrating photovoltaic power generation combined heat and power generation system and a component structure thereof. Sunlight penetrates through a protection window from the first side of the protection window, and projects to a main reflector positioned on the second side of the protection window; the sunlight is gathered by the main reflector, and reflected to a secondary reflector arranged on the protection window; the sunlight is gathered by the secondary reflector and reflected to a solar energy concentrating component arranged on the main reflector, for converting solar energy into electric energy or heat energy. The high concentrating photovoltaic power generation combined heat and power generation system is small in concentration light spot, dispersed in energy and high in concentration ratio, and transfers heat into the cooling medium or the air by a heat sink connected with the solar energy concentration component, thus ensuring that a solar cell or a light absorber has proper working temperature under the condition of high concentration ratio, so as to maintain the work efficiency thereof.

Description

technical field [0001] The invention relates to the technical field of concentrating photovoltaics, in particular to a high concentrating photovoltaic power generation cogeneration system and its component structure. Background technique [0002] Concentrating solar photovoltaic technology (CPV) is a technology that uses optical elements such as lenses or mirrors to concentrate a large area of ​​sunlight into a very small area, and then directly converts it into electrical energy through photovoltaic cells with high conversion efficiency. [0003] The concentrators of concentrating photovoltaic power generation systems in the prior art can be divided into refraction concentrators and reflective concentrators according to optical principles. The refractive lens used in the refractive concentrator, such as a Fresnel lens, has equidistant tooth patterns on one side of the lens, through which the light bandpass reflection or refraction of the specified spectral range can be achi...

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Problems solved by technology

[0005] However, Fresnel lenses or parabolic curved mirrors are difficult to process, low in precision, high in cost, and short in product life, making it difficult to popularize and apply them.

If the mirror reflector uses a plastic reflector, the reflective surface will fall off due to the thermal expansion and contraction coefficients of the reflective layer and the skeleton layer (such as glass) are different, and the reflectivity will decrease or it will be difficult to continue to use; if the mirror reflector uses a thin aluminum plate, It is difficult to withstand the harsh outdoor environment (such as hail), it will also cause permanent damage due to scrubbing, and the processing cost is high

[0006] The sunlight passes through the concentrator and converges to the concentrating solar cell; however, the concentrating solar cell works under the condition of high light intensity and high current, and the peak power of the concentrating solar cell will decrease with the increase of temperature, so it is necessary to design Reasonable heat dissipation system to improve the power generation efficiency of the concentrated photovoltaic power generation system and prolong its service life

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