Reflection silver mirror used for solar energy thermal power generation and manufacturing method thereof

Abstract

The invention discloses a reflection silver mirror used for solar energy thermal power generation. The reflection silver mirror comprises ultrawhite ultrathin glass and substrate glass of a parabolic shape. A front surface of the ultrawhite ultrathin glass is plated with a highly transparent self-cleaning film layer. A back surface of the ultrawhite ultrathin glass is plated with an Al[2]O[3] bonding layer which is plated with an Ag reflecting layer. The above plated ultrawhite ultrathin glass is integrally fixed on a paraboloid of the substrate glass through the bonding layer. The reflection silver mirror has the advantages of high reflectivity and good weather resisting property.

Description

technical field [0001] The invention relates to the technical field of solar thermal power generation, in particular to a reflective silver mirror for solar thermal power generation and a manufacturing method thereof. Background technique [0002] The reflectors for trough solar thermal power generation are parabolic reflectors. At present, there are mainly glass rear surface mirrors and metal front surface mirrors in the world. Metal front surface mirrors are mostly polished with stainless steel front surface (film) or high-purity aluminum front surface polishing and oxidation process. , poor weather resistance, cannot meet the service life of solar power generation for more than 20-30 years; and the silver-coated glass rear surface mirror is the most common and most promising long-term use mirror. [0003] At present, the trough reflector that can withstand the environmental test for a long time in the world is the glass rear surface mirror. Most of this silver-coated glas...

AI Technical Summary

Problems solved by technology

[0005]Second: The other side of the above-mentioned weather-resistant silver mirror is a bare mirror surface. Since the silver mirror is exposed to the environment as a whole when in use, after a long time of use, Dust in the air will deposit on the surface of the silver mirror. For this kind of silver mirror without self-cleaning effect, if the silver mirror is cleaned artificially, it will not only consume time and labor, but also increase the cost of use. Washing will greatly reduce the reflectivity

Since the paraboloid of the transparent substrate has a decisive effect on the reflectivity, the accuracy of the paraboloid of the transparent substrate depends entirely on the manufacturing process. After the transparent substrate is formed, the accuracy of the paraboloid cannot be changed or adjusted.

However, for a solar thermal power generation device that includes reflective silver mirrors composed of N pieces of such transparent substrates, due to the difference in the accuracy of the paraboloids of the transparent substrates, the reflectivity of these reflective silver mirrors will vary greatly.

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