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Trough type solar medium-high-temperature heat collecting tube coating

A medium and high temperature collector tube, trough solar technology, applied in solar thermal power generation, solar thermal devices, coatings, etc.

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

AI Technical Summary

Problems solved by technology

In addition, when the sun is deflected in the morning and afternoon, the angle between the incident light and the surface of the heat collecting tube becomes larger, and the absorption rate is further reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The preparation process is as follows:

[0017] Sputtering deposition of niobium anti-infrared reflection film on stainless steel substrate, working pressure 0.2-1.5 Pa; sputtering aluminum oxynitride silicon absorption film on anti-infrared reflection film, working pressure 0.2-0.8Pa, reaction gas nitrogen and oxygen, nitrogen and oxygen The volume ratio is 1:1~1:10, the sputtering ratio of silicon and aluminum is: 1:1~1:10, the gas volume is 100-200Sccm; the aluminum oxide anti-reflection film is deposited on the aluminum oxynitride silicon gradient absorption film by sputtering , the working pressure is 0.2-0.8Pa, and the oxygen content of the reaction gas is 30-200Sccm.

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Abstract

The invention relates to a trough type solar medium-high-temperature heat collecting tube coating which comprises a stainless steel base body. An anti-infrared reflecting film, an aluminum oxynitride gradually-changing absorbing film and an antireflection film are sequentially arranged on the stainless steel base body. The heat collecting tube coating has low low-temperature emitting rate, so that a film system has low heat loss and good heat-preserving performance. In addition, the coating is made of a high-hardness abrasion-resisting anti-oxidizing material and has low resistivity, so that the weather resistance and the intermediate-temperature using performance of a heat collecting device are excellent, and the trough type solar medium-high-temperature heat collecting tube coating is suitable for a heat collecting tube at the temperature of 300-450 DEG C.

Description

technical field [0001] The invention belongs to solar heat collectors, and more specifically, the invention relates to a coating of a trough solar medium and high temperature heat collecting tube. Background technique [0002] Energy and the environment are two prominent social issues in the world today. Facing the shortage of various energy sources and environmental pollution, the search for the utilization of renewable energy has become the main direction of energy research in various countries. Solar energy is a renewable, non-polluting, and abundant resource. How to make full use of solar energy resources is to improve the energy utilization rate and utilization rate of solar collectors, and its core technology is to prepare a high absorption rate, low Emissivity, cheap selective absorbing coatings. In the field of solar heat utilization, the current development focus is on medium and high temperature heat collection, and heat collection tubes with working temperatures ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/46F24J2/48B32B15/00C23C14/06C23C14/35
CPCY02E10/40
Inventor 葛波
Owner SUZHOU JIAYAN ENERGY EQUIP
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