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Vacuum solar thermal panel with a vacuum tight glass-metal sealing

A technology of solar thermal panels and airtight glass, applied in solar thermal energy, solar collectors using working fluids, solar thermal power generation, etc.

Active Publication Date: 2011-07-13
TVP SOLAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, gums, silicone rubbers or polysulfides, because of their organic structure, will allow gas to pass through over time, preventing their use for long-term high-vacuum applications

Method used

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  • Vacuum solar thermal panel with a vacuum tight glass-metal sealing
  • Vacuum solar thermal panel with a vacuum tight glass-metal sealing
  • Vacuum solar thermal panel with a vacuum tight glass-metal sealing

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no. 2 example

[0036]According to the first or second embodiment of the invention respectively, the vacuum-tight integral glass-metal seal can be of two types:

[0037] a) It can be a matching glass-metal seal 8, so that the edge 16 of the peripheral band 4 is embedded in the glass material 14, due to the glass sheets 1, 2 ( Figure 4 ) obtained by partial melting and subsequent solidification;

[0038] b) It can be a compressed glass-to-metal seal 108 with the edge 116 of the peripheral strip 104 embedded in the glass material 114, since the peripheral strip 104 is in contact with the glass sheet 101 ( Figure 5 ) formed by the melting of connected frit glass materials.

[0039] In both embodiments, the glass material 14 , 114 is adhered directly to the metal perimeter band 4 , 104 . In the first embodiment the glass material 14 is part of the first plate 1 which is always made of glass, whereas in the second embodiment the glass material 114 is formed at the edge of the metallic peripher...

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Abstract

A vacuum solar thermal panel comprises a vacuum envelope (30) defining a sealed volume, able to withstand atmospheric pressure when evacuated, at least one heat absorber (12) being disposed inside the vacuum envelope (30), a pipe (13) entering and exiting the envelope (30) and being in contact with the heat absorber (12), said vacuum envelope (30) comprising a first plate (1; 101) made of glass, a peripheral frame (3) disposed substantially at the periphery of the first plate (1; 101), a metallic peripheral belt (4, 5; 104) joining the peripheral frame (3) to the first plate (1; 101), said metallic peripheral belt (4; 104) being joined to the first plate (1; 101) by means of a vacuum tight bulk glass-metal seal (8, 108), comprising glass material (14; 114) and obtained by fusion and subsequent solidification of said glass material (14; 114). The metallic peripheral belt (4; 104) includes at least one elastically deformable portion (10; 110) that prevents the bulk glass-metal seal (8; 108) from getting damaged and is no more vacuum tight when subject to the evacuation process of the envelope and the thermal treatments of the panel and the potential reciprocal displacements of the glass plate (1, 2) and the joined metallic peripheral belt (4, 5;110).

Description

technical field [0001] The invention relates to a vacuum solar thermal panel and a method for manufacturing said vacuum solar thermal panel according to the preamble of the main claim. Background technique [0002] Evacuated tube solar panels are usually obtained by connecting a plurality of heat pipes in parallel, and having heat absorber fins mounted thereon, wherein the fins are sealed in each evacuated glass tube. [0003] The disadvantage of this design is that it provides a significant dead space between the heat sinks and also that a larger part of the heat transfer fluid circuit is outside the vacuum insulation. [0004] To overcome these limitations, flat evacuated solar thermal panels have been developed, which consist of a flat vacuum-tight envelope with glass panels transparent to visible solar radiation. Inside the vacuum envelope are arranged a heat absorber and pipes entering and leaving the envelope and connecting with the heat absorber. Solar radiation ent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/50F24J2/05C03C27/02F24S10/40F24S10/50F24S10/70
CPCF24J2002/5275F24J2/507Y02E10/44F24J2/26F24J2/05F24J2002/4681C03C27/02F24S2025/6013F24S10/75F24S2025/011F24S80/54F24S10/40Y10T29/49345Y10T29/49355F24S80/58
Inventor V·帕尔米耶里
Owner TVP SOLAR
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