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Thermal collection tube of intermediate-and-low temperature solar thermal collector

A technology of solar heat collectors and heat collecting tubes, applied in the field of solar heat collectors

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

[0015] The heat collection tube of the medium and high temperature solar heat collector of the present invention includes a stainless steel substrate, on which a layer of molybdenum anti-infrared reflection film, aluminum oxynitride gradient absorption film and silicon dioxide anti-reflection film are sequentially arranged.

[0016] The preparation process is as follows:

[0017] Sputtering deposited molybdenum anti-infrared reflective film on stainless steel substrate, working pressure 0.2-1.5 Pa; sputtering oxynitride gradient absorption film on anti-infrared reflective film, working pressure 0.2-0.8Pa, reaction gas nitrogen, nitrogen to oxygen volume ratio 1:1~1:10, gas volume 60-150Sccm; sputtering deposition of silicon dioxide anti-reflection film on oxynitride gradient absorption film, working pressure 0.2-0.8Pa, reaction gas oxygen volume 30-200Sccm.

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PUM

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Abstract

The invention relates to a thermal collection tube of an intermediate-and-low temperature solar thermal collector. The thermal collection tube comprises a stainless steel base body and is characterized in that an anti-infrared reflecting film, aluminum oxynitride and an antireflective film are arranged on the stainless steel base body. According to the thermal collection tube, a coating of the heat collection tube has low-temperature transmission rate, so that a film system has low heat loss, the heat insulation performance is good, and simultaneously, the coating is high in rigidity, wear-resistant and anti-oxidation, and is low in resistivity, so that the thermal collector disclosed by the invention is excellent in weather fastness and usability in intermediate temperature, and is suitable for being used at 350 DEG C-550 DEG C.

Description

technical field [0001] The invention belongs to solar heat collectors, and more specifically, the invention relates to a heat collecting tube of a medium-high temperature solar heat collector. 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 exce...

Claims

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Application Information

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