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Direct connection type solar energy vacuum heat collection pipe

A technology of vacuum heat collecting tubes and solar energy, applied in the direction of solar thermal power generation, solar thermal devices, heating devices, etc., can solve the problems of not being suitable for large-scale popularization and application, high production cost, low vacuum degree, etc., so as to facilitate mass processing, Reduce the difficulty of production and delay the effect of coating attenuation

Inactive Publication Date: 2014-01-15
YICHANG SANXIA NEW ENERGY EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the different properties of metal, glass and sealing materials and their thermal expansion coefficients, the vacuum degree is not high and unstable, and the production cost is particularly high, so it is not suitable for large-scale application.

Method used

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  • Direct connection type solar energy vacuum heat collection pipe

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Embodiment Construction

[0012] Such as figure 1 Among them, a straight-through solar vacuum heat collection tube includes a metal tube 1, the metal tube 1 in this example is made of aluminum, the inner wall of the metal tube 1 has been oxidized or coated, and the outer wall of the metal tube 1 is provided with a solar absorbing coating. The coating used in this example is "aluminum-nitrogen / aluminum solar selective absorption coating", which uses aluminum metal tubes with good thermal conductivity; absorbent coating". Aluminum is rich in resources, easy to process, and relatively low in cost and cost. Aluminum metal tubes have high recycling value and can be reused. Of course, in some occasions, such as occasions with higher pressure bearing requirements, stainless steel can also be used.

[0013] The metal tube 1 is covered with a vacuum glass tube 4, and a sealing ring 2 is provided between the metal tube 1 and the vacuum glass tube 4 near both ends. As shown in the figure, an annular groove 3 i...

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Abstract

The invention discloses a direct connection type solar energy vacuum heat collection pipe which comprises a metal pipe. A solar energy absorbing coating is arranged on the outer wall of the metal pipe, the metal pipe is sleeved with a vacuum glass pipe, a sealing ring is arranged at the position, close to the two ends, between the metal pipe and the vacuum glass pipe, and an annular sealing cavity is formed. By the adoption of the structure, the heat collection effect of the heat collection pipe is effectively improved, the structure of the vacuum pipe is adopted to replace the structure of a single-layer glass pipe, the thermal preservation performance is effectively improved, due to the fact that vacuum is not required to be formed in the sealing cavity, nitrogen can be filled, the solar energy absorbing coating on the outer layer of the metal pipe is effectively protected, the coating attenuation is slowed down, batch processing of the vacuum pipe is facilitated, and compared with the prior art with the higher sealing process requirement, the direct connection type solar energy vacuum heat collection pipe has the advantage that the whole production difficulty can be reduced.

Description

technical field [0001] The invention relates to a vacuum heat collecting tube, in particular to a straight-through solar vacuum heat collecting tube. Background technique [0002] Vacuum heat collecting tubes are widely used in medium and high temperature heat utilization fields such as solar steam power generation. The existing technology is to coat a glass tube (single layer) with a metal tube, and use a unique sealing technology to fix the glass tube and metal tube. Vacuum layer. However, due to the different properties of metal, glass and sealing materials and their thermal expansion coefficients, the vacuum degree is not high and unstable, and the production cost is particularly high, which is not suitable for large-scale application. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a straight-through solar vacuum heat collecting tube, which can significantly improve the heat collecting effect of the heat co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/46
CPCY02E10/40
Inventor 李长桥
Owner YICHANG SANXIA NEW ENERGY EQUIP
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