Formation method of high-performance selective absorption treatment membrane

A selective, membrane-treating technology, applied in solar thermal power generation, metal material coating process, heating devices, etc., can solve the problem of failing to achieve the heat-collecting properties of selective absorption treatment membranes, and improve the selective absorption performance, The effect of improving thermal efficiency and film density

Active Publication Date: 2017-07-28
YAZAKI ENERGY SYST
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Problems solved by technology

[0008] However, in the case of chemical conversion treatment such as only by a mixture of sulfuric acid and sodium dichromate or sulfuric acid and chromic anhydride, the solar light absorptivity α-infrared emissivity ε (α-ε) that characterizes the performance of the selective absorption film Low, not at a level that can fully satisfy the heat collection characteristics of the selective absorption treatment membrane

Method used

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  • Formation method of high-performance selective absorption treatment membrane
  • Formation method of high-performance selective absorption treatment membrane
  • Formation method of high-performance selective absorption treatment membrane

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Experimental program
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Embodiment ）

[0054] Hereinafter, the present invention will be described in further detail with reference to specific examples, but the scope of the present invention is not limited thereto.

Embodiment 1～12、 comparative example 1～13）

[0056] In the following treatment solution, the stainless steel plate (SUS444) was reacted at the immersion time and sulfate concentration shown in Tables 1 to 3 while the stainless steel plate (SUS444) was in a treatment bath at 116°C. It should be noted that Fe 2 (SO 4 ) 3 and Cr 2 (SO 4 ) 3 Add in equal amounts. The raw materials of the treatment liquid used are reagents from Kanto Chemical Co., Ltd., Japan.

[0057] [Treatment liquid components]

[0058]

[0059] The evaluation of selective absorption characteristics was carried out as described below.

[0060] The absorption rate α is calculated by measuring the reflectance R in the UV, visible light, and near-infrared regions (300-2100 nm) using JASCO Corporation V-570, and using the formulas I and II of the following formula 1.

[0061] The emissivity ε was calculated by measuring the reflectance R in the infrared region (2500-25000 nm) using the FT / IR-400 manufactured by JASCO Corporation, and using the form...

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Abstract

PROBLEM TO BE SOLVED: To provide a formation method of a selective absorption plane of a solar heat utilizing collector capable of forming the selective absorption plane having excellent heat collection characteristic on the surface of a metal substrate, and to provide a selective absorption treatment film formed thereby.SOLUTION: In a formation method of a selective absorption plane, which is a method for forming a selective absorption plane on the surface of a metal substrate by dipping the metal substrate into a chemical conversion treatment liquid containing sulfuric acid and sodium dichromate or chromic anhydride, the chemical conversion treatment liquid contains a metal salt of oxo acid or hydrohalic acid.

Description

technical field [0001] The present invention relates to a solar heat collecting plate, a selective absorption film and a heat collector utilizing solar energy, in particular to an improvement technology of a selective absorbing surface formed on a substrate surface of a solar heat collecting plate. Background technique [0002] As one of the methods of effectively utilizing solar energy, the solar collector using the heat collecting plate is gradually popularized, but it is also required that the solar collector can absorb solar heat efficiently, and the absorbed heat energy is not easy to be released. characteristics. [0003] Therefore, as a heat collector utilizing solar energy, it is preferable that the surface of the substrate can be formed to have a high absorptivity to light with a wavelength of 0.3 μm to less than 2.5 μm in sunlight and an absorptivity to light with a wavelength of 2.5 to 25 μm. Low characteristic selective absorption membrane. [0004] Conventiona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/24F24J2/48
CPCF24S70/225Y02E10/40
Inventor 黑田纯松本徹谷生美典
Owner YAZAKI ENERGY SYST
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