High-temperature solar selective absorption coating

A technology of absorption coating and absorption layer, which is applied in the field of solar selective absorption coating in high-temperature heat collecting tubes, can solve the problems of decreasing thermal efficiency, increasing infrared emissivity, increasing heat loss of heat collectors, etc., and achieves good high temperature stability performance , High absorption rate, the effect of reducing working cost

Inactive Publication Date: 2012-10-10
SUZHOU JIAYAN ENERGY EQUIP
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, under high temperature conditions, because the infrared emissivity increases significantly with the increase of temperature, the heat loss of the collector increases significantly, and the thermal efficiency decreases significantly.

Method used

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Embodiment 1

[0026] The high-temperature solar energy selective absorption coating of the present invention comprises four layers of films, which are an infrared reflection layer, a first absorption layer, a second absorption layer and an anti-reflection layer successively from the substrate to the surface, and the infrared reflection layer is composed of a Mo film with a thickness of 20-35nm; the first absorption layer is a Mo+TiN film with a thickness of 50-100nm, and the content of TiN is 20-35wt%; the second absorption layer is a Mo+TiN film with a thickness of 75-150nm. Wherein the content of TiN is 35-50wt%; the anti-reflection layer is a TiN film with a thickness of 50-75nm. The performance of the solar selective absorbing coating prepared by the invention is as follows: after the coating is annealed in vacuum at 400 DEG C for 1 hour, the absorption rate of the coating is 92%-93%.

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Abstract

The invention relates to a high-temperature solar selective absorption coating, which is characterized by sequentially comprising an infrared reflecting layer, a first absorption layer, a second absorption layer and an anti-reflection layer from a substrate to the surface. Raw materials selected for the coating are conventional materials, the application range is wider, the forming performance is good, the raw materials can be processed into a cylindrical target material, the utilization rate of the target material is remarkably improved, and the price is also low, so that the working cost can be further reduced. The high-temperature solar selective absorption coating is suitable for a solar heat collection pipe with medium and high working temperatures.

Description

technical field [0001] The invention relates to the field of trough-type solar high-temperature thermal power generation, in particular to a coating for selectively absorbing solar energy in a high-temperature heat collection tube. Background technique [0002] Solar thermal power generation is an important technical approach for large-scale development and utilization of solar energy. At present, there are tower, trough, and dish systems, among which trough and tower systems are more commercially used, especially trough solar thermal power generation, which is the most popular so far. So far, it is the only mature technology in the world that has been commercialized for 20 years, and its cost is much lower than that of photovoltaic power generation. The energy storage system of the trough-type concentrating thermal power generation system can realize 24-hour operation. With the increase of scale, the cost of power generation is also very competitive. At present, the focus ...

Claims

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Application Information

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IPC IPC(8): F24J2/48B32B15/04B32B33/00
CPCY02E10/40
Inventor 葛波
Owner SUZHOU JIAYAN ENERGY EQUIP
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