Solar energy heat absorbing coating of vacuum pipe

A technology of solar heat absorption and vacuum tubes, applied in the field of coatings, can solve the problems of cumbersome preparation process, short production cycle, poor surface quality, etc., and achieve the effect of simple production process, low cost and stable performance

Inactive Publication Date: 2014-04-30
广西宾阳县荣良农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a solar heat absorbing paint which can be used for vacuum tubes with simple preparation process, low pollution, low raw material, high surface quality of the formed paint film, various colors, short production cycle and high energy conversion efficiency, which solves the problem of current solar heat absorbing paint. The surface quality of thermal coating is poor, the production cost is high, and the preparation process is cumbersome, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Mix 40 parts of silicon solution, 10 parts of polyamine resin, and 20 parts of xylene, and stir evenly by hand, then add 3 parts of organic carbon black, 10 parts of FeMnCuO x Powder, 12 parts of additives (3 parts of leveling agent, 4.5 parts of dispersant, 3 parts of wetting agent, 1.5 parts of anti-sedimentation agent), stirred evenly by a stirrer at a speed of 350 rpm, filtered, and then Add the remaining 5 parts of solvent, stir evenly with a stirrer at a speed of 350 rpm, and finally filter again to obtain the solar heat-absorbing coating, and the parts of the above raw materials are measured in parts by mass.

[0029] The coating was uniformly coated on the outside of the vacuum tube of the heat collector. After curing at room temperature, the solar absorptivity of the coating was 0.974, and the emissivity was 0.29.

Embodiment 2

[0031] Mix 40 parts of silicon solution, 10 parts of polyamine resin, and 20 parts of ethanol, stir evenly by hand, then add 3 parts of iron powder and 10 parts of FeNiCuO to the above mixed solution x Powder, 12 parts of additives (3 parts of leveling agent, 4.5 parts of dispersant, 3 parts of wetting agent, 1.5 parts of anti-sedimentation agent), stirred evenly by a stirrer at a speed of 370 rpm, filtered, and then Add the remaining 5 parts of solvent, stir evenly with a stirrer at a speed of 370 rpm, and finally filter again to obtain the solar heat-absorbing coating, and the parts of the above raw materials are measured in parts by mass.

[0032] The coating was evenly coated on the outside of the vacuum tube of the heat collector. After curing at room temperature, the solar absorption rate of the coating was 0.962, and the emissivity was 0.27.

Embodiment 3

[0034] Mix 32 parts of silicon solution, 8 parts of polyamine resin, and 24 parts of ethanol, and stir evenly by hand, then add 6 parts of iron powder, 1 part of cadmium sulfide, and 10 parts of FeMnCuO to the above mixed solution x?? Powder, 5 parts (FeO) x (Fe 2 o 3 ) y Powder, 8 parts of additives (2 parts of leveling agent, 3 parts of dispersant, 2 parts of wetting agent, 1 part of anti-sedimentation agent), after being stirred evenly by a stirrer at a speed of 400 rpm, filtered, and then Add the remaining 6 parts of solvent, stir evenly with a stirrer at a speed of 400 rpm, and finally filter again to obtain a solar heat-absorbing coating, and the parts of the above raw materials are measured in parts by mass.

[0035] The coating was uniformly coated on the outside of the vacuum tube of the heat collector. After curing at room temperature, the solar absorption rate of the coating was 0.977, and the emissivity was 0.24.

[0036] Will be sprayed on the coating adhesion...

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Abstract

The invention relates to a solar energy heat absorbing coating which can be used in a vacuum pipe type heat collector or other heat collectors of converting solar energy into heat energy. The solar energy heat absorbing coating is prepared from resin, pigment, a solvent and an additive. The color of the solar energy heat absorbing coating can be changed according to different pigment preparations, the solar energy heat absorbing coating is good in coordination of environment color matching, high in surface quality, stable in performance, simple in production process, low in cost and convenient and simple to use. Experiments indicate that the solar energy heat absorbing coating is uniformly coated on the outer surfaces of the vacuum pipe of the heat collector, and is high in solar energy absorbing rate (0,962-0.977) and low in emitting rate (0.24-0.29) after being cured at room temperature, and high in efficiency of converting solar energy into heat energy.

Description

technical field [0001] The invention relates to a paint, in particular to a solar heat-absorbing paint that can be used for vacuum tube heat collectors. Background technique [0002] Solar energy is a kind of harmless green energy that is widely distributed and inexhaustible, but due to the low energy density, the direct utilization efficiency is low, or even unusable. Solar heat-absorbing coating is a kind of functional coating, which can convert solar radiation energy into heat energy by covering the surface of the heat collector to form a film that can enrich the solar energy density, and improve the efficiency of light-to-heat energy conversion. Solar heat absorbing coating films are generally exposed outdoors for a long time, so it is required to have good weather resistance and water resistance, and at the same time, the cost of the coating must be low. [0003] The common paints are mostly black paints with a single color, which does not conform to people's aesthetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D175/04C09D7/12
Inventor 李益忠吴定超马江
Owner 广西宾阳县荣良农业科技有限公司
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