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Condensing glass evacuated medium-temperature collector tube

A glass vacuum, concentrating technology, applied in the field of solar energy utilization, can solve the problems of short working life, large investment in manufacturing equipment, high requirements for wind and corrosion resistance, and achieve various shapes and settings, improve optical energy density, and prolong working life. Effect

Inactive Publication Date: 2013-03-06
程翠英 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The manufacturing technology of metal-glass vacuum tubes is complicated, the investment in manufacturing equipment is large, and the production cost is high
In addition, the heat collector has a large footprint, and the parabolic trough reflector needs to be equipped with a rotating device that automatically tracks sunlight, so the project has a large development area; it is more suitable for centralized large-scale thermal power generation projects, and is not suitable for land resource shortages. City
The reflector is exposed in the atmosphere, exposed to wind and rain, and has high requirements for wind resistance and corrosion resistance. The maintenance workload is relatively large, and the working life is short, generally 5 years.

Method used

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  • Condensing glass evacuated medium-temperature collector tube
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  • Condensing glass evacuated medium-temperature collector tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0023] Such as figure 1 , figure 2 , image 3 As shown, the concentrating glass vacuum medium-temperature heat collection tube of the present invention has a structure in which a metal reflective condenser is built into the solar glass vacuum tube 1 . The solar glass vacuum tube 1 includes a glass cover tube 5, a glass inner tube 2 coated with a selective absorption coating 3 on the outer wall, a bracket 6 and a getter 8, and the material of the glass cover tube 5 and the glass inner tube 2 is preferably high boron The linear thermal expansion coefficient of silicon glass and high boron glass is (3.3±0.1)×10 -6 K, so it is also called borosilicate glass 3.3. The glass inner tube 2 is placed in the glass cover tube 5, supported by a bracket 6 at the bottom of the glass inner tube 2 and the glass cover tube 5, and the open end is welded and sealed. The interlayer is a vacuum layer, and the getter 8 is arranged on the bracket 6 to form a solar glass vacuum tube 1 . Preferab...

Embodiment 1

[0029] The outer diameter of the glass cover tube 5 is 102 mm, and the total length is 1500 mm or 1800 mm; the outer diameter from the distance from the opening end of the glass cover tube 5 to the opening end is 58 mm; the outer diameter of the glass inner tube 2 is 20 mm, and the distance from the opening end of the glass inner tube 2 is 70 mm The outer diameter to the open end is 58 mm, and the glass cover tube 5 and the glass inner tube 2 are made of borosilicate glass 3.3. The metal reflective concentrator 4 placed in the vacuum interlayer 7 is shaped like a trough concentrating paraboloid or other concave and curved concentrating surfaces, and is made of mirror polished aluminum sheet, mirror stainless steel sheet, or mirror tin iron sheet, with a thickness of 0.3mm-0.2mm , with a width of 98mm and a concentration ratio of 5, it is a concentrating glass vacuum medium-temperature heat collector with a large concentration ratio.

Embodiment 2

[0031]The outer diameter of the glass cover tube 5 is 70 mm, and the total length is 1500 mm or 1800 mm; the outer diameter from the distance from the opening end of the glass cover tube 5 to the opening end is 58 mm; the outer diameter of the glass inner tube 2 is 20 mm, and the distance from the opening end of the glass inner tube 2 is 50 mm The outer diameter to the open end is 58mm or 47mm, and the glass cover tube 5 and the glass inner tube 2 are made of borosilicate glass 3.3. The metal reflective concentrator 4 placed in the vacuum interlayer 7 is shaped like a trough concentrating paraboloid or other concave and curved concentrating surfaces, and is made of mirror polished aluminum sheet, mirror stainless steel sheet, or mirror tin iron sheet, with a thickness of 0.3mm-0.2mm , the width is 50mm or 62mm, and the concentration ratio is 3, which is a medium concentration ratio concentrating glass vacuum medium temperature heat collector.

[0032] The air-drying temperatur...

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Abstract

The invention discloses a condensing glass evacuated medium-temperature collector tube, which comprises a glass shielding tube, an internal glass tube, a holder and degasifier, selective absorbing coating is coated on the outer wall of the internal glass tube, the internal glass tube is arranged in the glass shielding tube, the bottoms of the internal glass tube and the glass shielding tube are supported by the holder, the open ends of the internal glass tube and the glass shielding tube are welded to be sealed, the interlayer between the internal glass tube and the glass shielding tube is a vacuum layer, the degasifier is arranged on the holder, and a metal reflective condenser is arranged in the vacuum interlayer, and is fixed on the holder. The invention realizes the structural integration of the metal reflective condenser and the a solar evacuated tube, accomplishes the innovation of the a full-glass solar medium-temperature evacuated tube product, and can be applied to solar medium temperature. The condensing glass evacuated medium-temperature collector tube has the advantages of high cost performance and good economic benefit, and is suitable for mass production.

Description

technical field [0001] The invention belongs to the field of solar energy utilization, in particular to a concentrating glass vacuum heat collecting tube suitable for warm utilization of solar energy. Background technique [0002] China's solar thermal utilization industry is entering the early stage of technological development of solar thermal power generation and medium and high temperature thermal engineering applications. At present, most of the concentrating systems of solar thermal power generation and medium and high temperature thermal engineering in China are external concentrating medium and high temperature solar energy. Heat collector, put the straight-through solar vacuum tube on the focal line of the trough concentrator to obtain high-temperature heat. The trough concentrator and the solar vacuum tube are two separate parts. [0003] The straight-through solar vacuum tubes used in external concentrating medium-high temperature solar collectors are basically me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/46F24J2/48F24J2/10F24S23/70
CPCY02E10/40
Inventor 程翠英罗赞继于学德
Owner 程翠英
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