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Black absorbent coating, solar-thermal conversion component with coating and solar water heater

An absorbing coating and light-to-heat conversion technology, which is applied in solar thermal power generation, radiation-absorbing coatings, coatings, etc., to achieve the effects of increasing light-to-heat conversion efficiency, good salt spray resistance, and high light-to-heat conversion efficiency

Active Publication Date: 2018-07-17
山东省圣泉生物质石墨烯研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coating has strict requirements on the film preparation process and thickness control, and there are many difficulties in large-scale application.

Method used

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  • Black absorbent coating, solar-thermal conversion component with coating and solar water heater
  • Black absorbent coating, solar-thermal conversion component with coating and solar water heater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A solar water heater, comprising a cylindrical water storage tank, a light-to-heat conversion component capable of exchanging heat with the water storage tank, the light-to-heat conversion component has a substrate and a black body-absorbing coating coated on the substrate, The black body absorbing coating sequentially includes a 60nm silver infrared reflective layer, a 10nm nickel oxide barrier layer, a 0.5 μm graphene absorbing layer, a 10nm dichromium trioxide auxiliary absorbing layer and a 20nm silicon nitride antireflection layer starting from the substrate.

[0049] The preparation method of the black body absorbing coating is:

[0050] (1) Ultrasonic the substrate in acetone for 10 minutes, then take it out and rinse it with deionized water; then ultrasonically clean it with ethanol for 10 minutes, then rinse it with deionized water; finally soak it in ethanol for 5 minutes, and dry it with nitrogen;

[0051] (2) With silver as the target material, in a vacuum of ...

Embodiment 2

[0057] The difference from Example 1 is that the black body absorbing coating sequentially includes a 90nm silver infrared reflective layer, a 60nm nickel oxide barrier layer, a 20 μm graphene absorbing layer, a 20nm chromium trioxide auxiliary absorbing layer, and a 50nm Silicon nitride anti-reflection layer.

[0058] (1) Ultrasonic the substrate in acetone for 10 minutes, then take it out and rinse it with deionized water; then ultrasonically clean it with ethanol for 15 minutes, then rinse it with deionized water; finally soak it in ethanol for 5 minutes, and dry it with nitrogen;

[0059] (2) With silver as the target material, in a vacuum of 8.5×10 -4 Under the environment of Pa, adjust the sputtering distance to 90mm, pass in the sputtering gas argon, adjust the sputtering pressure to 0.4Pa, and sputter to obtain an infrared reflective layer made of silver with a thickness of 80nm;

[0060] (3) Pre-pump the magnetron sputtering vacuum chamber to a background vacuum of 8...

Embodiment 3

[0065] The difference from Example 1 is that the black body absorbing coating sequentially includes an infrared reflective layer made of 80nm copper, a 50nm nickel oxide barrier layer, a 30 μm graphene absorbing layer, a 40nm dichromium oxide auxiliary absorbing layer and a 40nm Silicon nitride anti-reflection layer.

[0066] The difference between the preparation method of the black body absorbing coating and Example 1 is that the target in step (2) is replaced by a copper target.

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Abstract

The invention relates to a black absorbent coating. The coating comprises an infrared reflection layer, a blocking layer, a graphene material absorbing layer, an auxiliary absorbing layer and an antireflection layer in the light incident negative direction, the blocking layer is nickel oxide, and the auxiliary absorbing layer is chromium sesquioxide. The black absorbent coating has the beneficialeffects that the absorbing waveband is wider, the light utilization rate is higher, the solar-thermal conversion efficiency is higher, smoke resistance is good, and attaching force is high; secondly,the solar-thermal conversion efficiency of the solar-thermal conversion component with the black absorbent coating can reach 92 to 98%.

Description

technical field [0001] The invention belongs to the field of photothermal conversion of solar energy, and in particular relates to a black body absorbing coating, a photothermal conversion component containing the coating and a solar water heater. Background technique [0002] The basic principle of solar photothermal conversion is to collect solar radiation energy through the solar selective absorption coating, and convert it into heat energy through the interaction of light and matter for utilization. [0003] Solar selective absorbing coating is the most critical part of solar thermal conversion, and its quality and optical properties determine the efficiency of solar thermal conversion. In order to make full use of solar energy, solar radiation should be absorbed to the greatest extent, and the heat radiation loss of the material body to the environment should be minimized. According to different absorption principles and coating structures, solar selective absorption c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24S70/20F24S70/30C09D5/32C09D161/06
CPCC08K3/04C09D5/32C09D161/06Y02E10/40
Inventor 张金柱王立成李爱丽梁蒙蒙
Owner 山东省圣泉生物质石墨烯研究院
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