Tower-type heat collector light-thermal conversion coating and preparation method thereof

Abstract

The invention relates to the technical field of light-thermal conversion, in particular to a tower-type heat collector light-thermal conversion coating and a preparation method thereof. The invention provides the tower-type heat collector light-thermal conversion coating, which is arranged on a metal matrix, and comprises a transition layer, a high-infrared reflecting layer, and absorbing layer and an emission reducing layer sequentially arranged from inside to outside. The transition layer comprises a metal layer, a compound gradient layer and a compound layer sequentially arranged from inside to outside. The structure is simple, the process is simple and convenient, and the manufacturing cost is low. According to the tower-type heat collector light-thermal conversion coating provided by the invention, the transition layer is coated by adopting a gradual three-layer transition way from the metal layer to the metal compound layer, so that the binding force of the coating and the metal matrix is improved, the service life is long, and the tower-type heat collector light-thermal conversion coating can be applied in high temperature and bad atmospheric environment; and meanwhile, the light-thermal conversion coating provided by the invention has higher absorption rate within a solar spectrum range, has lower emissivity within an infrared region, has the characteristics of high temperature resistance and oxidation resistance, and meets the requirement on solar energy high temperature utilization.

Description

technical field [0001] The invention relates to the technical field of light-to-heat conversion, in particular to a light-to-heat conversion coating for a tower heat collector and a preparation method thereof, in particular to a light-to-heat tower heat collector with long service life, high absorption and low emission Conversion coating and method for its preparation. Background technique [0002] The representative power station that uses molten salt as the heat transfer and heat storage medium is the Solar Two solar power station in the United States. The temperature of the molten salt film on the wall of the heat-absorbing tube is as high as 603°C, and the temperature of the outer wall is as high as 633°C. Because the tower type adopts the method of point focusing, the focusing ratio is very high, and the instantaneous temperature on the surface of the heat absorber can reach more than 700°C. Especially in the power station with a large concentration ratio, the concentra...

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Problems solved by technology

[0006] The object of the present invention is to provide a light-to-heat conversion coating for tower collectors with long service life, high absorption and low emission and its preparation method, so as to solve the problems caused by the short service life and frequent replacement of existing high-temperature paints. Problems with high economic costs and affecting normal use

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