Straight through type vacuum solar energy thermal-collecting tube

A solar collector tube and straight-through technology, which is applied to solar collectors, solar collector safety, solar thermal energy, etc., can solve the problems of limited application range, inability to withstand higher temperatures, etc., to improve heat collection efficiency and use Effect of service life and buffering thermal expansion pressure

Inactive Publication Date: 2008-11-19
北京桑达太阳能技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current general solar vacuum heat collectors do not have the requirement to withstand higher temperatures, so their application range is limited.

Method used

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  • Straight through type vacuum solar energy thermal-collecting tube
  • Straight through type vacuum solar energy thermal-collecting tube

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Embodiment Construction

[0009] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0010] As shown in Fig. 1 and Fig. 2, the present invention comprises a glass tube 1, a metal heat absorbing tube 2 is sheathed in the glass tube 1, and the two ends of the glass tube 1 are sealed together with the glass through a metal end cap 3 respectively, The outer surface of the metal heat-absorbing pipe 2 is coated with a solar selective heat-absorbing coating. A corrugated tube 4 is arranged at both ends of the gap between the glass tube 1 and the metal heat-absorbing tube 2, and the outer end of each corrugated tube 4 is welded into one body with the metal end cap 3 of the end through a transition ring 5, and each corrugated tube The inner end of the tube 4 is connected with a transition tube 6 , the transition tube 6 passes through the corrugated tube 4 , and the metal end cap 3 passing through the end is welded to the outer end of the metal...

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PUM

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Abstract

The invention relates to a straight through vacuum solar collecting pipe, comprising a glass pipe, wherein, two ends of the glass pipe respectively thermally seal a metal heat absorbing pipe; the outer surface of the metal heat absorbing pipe is coated with solar selective absorbing coating; and a vacuum vent is arranged on the wall of the glass pipe. The invention is characterized in that: a sylphon bellows is respectively arranged on two ends of a gap between the glass pipe and the metal heat absorbing pipe; an outer end of each sylphon bellows is welded with a metal end cover of the end into a whole through a transitional ring; an inner end of each sylphon bellows is connected with a transitional pipe which passes through the inside of the sylphon bellows and the metal end cover of the end to be welded to the outer end of the metal heat absorbing pipe; and a vent-pipe vacuumizes between the glass pipe and the metal heat absorbing pipe into high vacuum. The straight through vacuum solar collecting pipe effectively improves the heat-collecting efficiency and the service life of the integral collecting pipe, can be widely applied in the fields such as solar cooling, industrial heating, seawater desalination and solar thermal power generation.

Description

technical field [0001] The invention relates to a solar heat collecting element, in particular to a straight-through vacuum solar heat collecting tube. Background technique [0002] General solar vacuum tubes mainly include glass tube heat absorber vacuum tubes and metal plate heat absorber vacuum tubes. The operating temperature of these two kinds of vacuum tubes is mostly below 100°C during solar heat collection. Another kind of straight-through vacuum solar collector tube with a metal tube heat absorber has a corrugated tube welded on the outer surface of one end of the metal tube. The corrugated tube is located outside the port of the glass tube. The corrugated tube can absorb the thermal expansion of the metal tube. Thereby, the sealing of the end cap between the protective glass tube and the metal tube can be achieved. However, the application temperature of this solar collector tube with only one bellows structure is only below 250°C. However, solar thermal power ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/05F24J2/24F24S10/40F24S10/70
CPCY02E10/44F24S10/45F24S40/80Y02A20/142Y02P80/20
Inventor 孙守建雷柏松南振英
Owner 北京桑达太阳能技术有限公司
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