Solar vacuum tube

A vacuum tube and solar energy technology, which is applied to solar thermal power generation, solar thermal devices, heating devices, etc., can solve the problems of reducing the ability of the inner tube to absorb solar radiation, the efficiency of solar vacuum heat absorption cannot be fully exerted, etc., and achieves a simple structure. , easy to make, and the effect of increasing the receiving area

Inactive Publication Date: 2014-04-16
GUANGXI JIKUAN SOLAR ENERGY EQUIP
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AI Technical Summary

Problems solved by technology

Usually the outer tube of the existing solar vacuum tube is made of transparent glass, but the sunlight irradiated on the inner tube through the outer tube has only a 50% absorption rate, because there is always half of the backlight surface on the inner tube without light irradiation, and in addition The choice of coating on the inner tube will also affect the absorption of light energy, thereby reducing the ability of the inner tube to absorb solar radiation, so that the heat absorption efficiency of solar vacuum cannot be fully utilized

Method used

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  • Solar vacuum tube
  • Solar vacuum tube

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Embodiment 1

[0022] Such as figure 1 As shown, the solar vacuum tube of the present invention includes a double-layer tube structure in which the inner tube 1 is arranged inside the outer tube 2, wherein the inner tube 1 is a metal inner tube; the outer peripheral surface of the outer wall of the inner tube 1 is formed by A solar absorbing layer 11 and an anti-reflection film 12 are sequentially arranged from the inside to the outside. The solar absorbing layer 11 is a silicon carbide-spodumene composite heat-absorbing ceramic layer, and the antireflection film 12 is SnO 2 film.

[0023] The outer tube 2 is a glass outer tube, the inner wall of the outer tube 2 is connected to the outer wall of the inner tube 1 through a sealing structure 3, and the sealing structure 3 includes a sealing cover, and the sealing cover is arranged on the An airtight connection is formed between the inner wall of one end of the outer tube 2 and the outer wall of one end of the inner tube 1, and between the s...

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Abstract

The invention provides a solar vacuum tube. The solar vacuum tube comprises a double-layered tube structure, wherein the double-layered tube structure is formed by arranging an inner tube in an outer tube; the inner wall of the outer tube is connected with the outer wall of the inner tube through a sealing structure; a vacuum cavity is formed by the inner wall of the outer tube, the outer wall of the inner tube and the sealing structure; projections are arranged on the peripheral surface of the outer tube; a reflecting film is coated on the inner wall of the outer tube; and a solar absorbing layer and an anti-reflection film are arranged on the peripheral surface of the outer wall of the inner tube from inside to outside. The solar vacuum tube is simple in structure and convenient to manufacture; the heat collection effect of the vacuum tube is further improved; heating energy on water is improved; the heating speed of water in a water tank of a solar water heater is increased; and a heating effect is obvious.

Description

technical field [0001] The present invention relates to a solar device for generating thermal energy, and more particularly to a solar vacuum tube with high efficiency for absorbing solar light energy. Background technique [0002] The solar vacuum tube is the main core component of solar thermal utilization to collect sunlight. A solar vacuum tube generally includes a glass outer tube and an inner tube. The outer wall of the inner tube is coated with a selective absorbing coating, and the interlayer of the inner and outer tubes is pumped into a high vacuum state. When sunlight shines on the absorbing coating of the inner tube through the outer glass tube, it is converted into heat energy and heats the heat transfer fluid in the inner tube. Usually the outer tube of the existing solar vacuum tube is made of transparent glass, but the sunlight irradiated on the inner tube through the outer tube has only a 50% absorption rate, because there is always half of the backlight sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/46
CPCY02E10/40
Inventor 马昭键蒙献芳梁红方梁志坚孟沪生吴胜马云马广韦信仕甘卫平
Owner GUANGXI JIKUAN SOLAR ENERGY EQUIP
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