Method for improving photovoltaic conversion efficiency of solar energy photovoltaic power generating panel

Abstract

The invention provides a method for improving the photovoltaic conversion efficiency of a solar photovoltaic power generation panel, comprising: using an EVA adhesive film to bond a composite metamaterial film to the light-receiving surface of a solar photovoltaic power generation panel; the composite metamaterial film is prepared by the following method : Micron-sized SiO ₂ The microspheres are dispersed in the dispersant and ultrasonically oscillated to obtain SiO ₂ microsphere dispersion; make SiO ₂ The microsphere dispersion is evenly distributed on the polymethylpentene film, so that the SiO ₂ The microsphere dispersion is volatilized, and the distribution of SiO ₂ Polymethylpentene thin film of microspheres; using rolling machine to distribute SiO ₂ The polymethylpentene film of the microspheres was rolled to obtain the composite metamaterial film. The invention utilizes the principle of radiation cooling to significantly reduce the surface temperature of the solar photovoltaic power generation panel, thereby improving the photovoltaic conversion efficiency of the solar photovoltaic power generation panel, and also has the advantages of low energy consumption, high efficiency and simple structure.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power generation and energy saving and emission reduction, and in particular relates to a method for improving the photovoltaic conversion efficiency of a solar photovoltaic power generation panel. Background technique [0002] Research data show that: when the battery temperature rises by 1°C, the photoelectric conversion efficiency of crystalline silicon cells decreases by about 0.4%, and that of amorphous silicon cells decreases by about 0.1%. The aging rate of crystalline silicon cells will double. At this stage, by comprehensively considering factors such as battery temperature, temperature uniformity, reliability, and simplicity, photovoltaic power generation mainly adopts passive and active cooling methods, and there are mainly the following specific cooling applications: [0003] (1) Air cooling: Air cooling is divided into natural convection cooling and forced convection cooling. A...

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Problems solved by technology

[0007] Some of the above methods are currently used, but there are some problems: the structure of the air cooling system is relatively simple, the cost is low, and the operation is convenient

However, the heat transfer coefficient of air is low, and the cooling effect is limited, especially in low-latitude regions, and when the ambient temperature is high, the cooling effect is poor; liquid cooling is also restricted by climatic conditions, in cold areas in the north and areas lacking water It cannot be applied on a large scale; although the effect of thermoelectric cooling is obvious, its extra power consumption is large and the economy is not high

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