Vacuum flat-plate solar thermal collector

Abstract

The invention discloses a vacuum flat-plate solar thermal collector, which consists of an enclosed flat box of which one side is provided with high-transmittance glass; a vacuum cavity is formed in the box; a plurality of strengthening supports are arranged between two panels of the box; and light absorption heat exchange plates provided with support through holes are arranged. The supports are arranged between the two panels of the box through the holes on the light absorption heat exchange plates. The light absorption heat exchange plates are not directly contacted with the cavity and the supports of the box, are connected with the box through an inlet and outlet header and are fixed and suspended in the vacuum cavity through a few of fixing blocks made of high thermal resistance material. Due to the adoption of the multi-support vacuum flat-plate structure and the mode that light absorption heat collection plates are suspended in the vacuum cavity, the problem that the conventional thermal collectors are difficult to achieve the insulating effect and the lighting efficiency simultaneously is well and comprehensively solved. The vacuum flat-plate solar thermal collector is convenient to integrate with the construction, expands the application of the solar thermal collector in the field of medium and high temperature, and can be applied to power generation, refrigeration, sea water desalinization and other application fields.

Description

technical field [0001] The invention belongs to the field of solar heat collection and utilization, especially a vacuum flat plate solar heat collector Background technique [0002] Existing solar heat collectors mainly include concentric double-layer vacuum glass tube heat collectors and polyurethane thermal insulation flat plate solar heat collectors. The double-layer vacuum glass tube collector is two concentric cylindrical glass tubes inside and outside. The inner glass tube is coated with a light-absorbing and heat-exchanging film to heat the working medium, such as water. Vacuum is drawn between the inner and outer cylindrical tubes for heat preservation, and the outer layer is made of high-transparency glass. Its advantages and disadvantages are: ①The effect of vacuum heat insulation is good. ② The heat collecting tubes are generally assembled and used in parallel at the same time, the distance between two adjacent inner tubes absorbing light energy is large, and th...

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Problems solved by technology

[0003] The invention solves the problem that the heat preservation and lighting efficiency of the existing solar heat collectors are difficult to balance well, combines the advantages of both the vacuum tube type and the flat plate heat collector, and proposes a vacuum with high heat collection efficiency and better heat preservation effect. Flat-plate solar collector

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