Reflecting trench type vacuum flat plate type solar heat collector

Abstract

The invention discloses a reflecting trench type vacuum flat plate type solar heat collector which is characterized in that one side of an enclosed type box body is a trench type back plate provided with a light reflection layer, and the other side of the enclosed type box body is high light-transmitting glass; a reflecting trench rim or a salient point arranged on the trench rim is arranged between two panels of the box body and supports the two panels of the box body, the box body is internally provided with a vacuum chamber, and a light absorption heat exchange tube (or a tube plate) is arranged in the chamber; and the light absorption heat exchange tube ( or the tube plate) is not in direct contact with the chamber of the box, is only connected with the box body through an in-out general tube and is fixed by the minority of fixation elements and is suspended in the vacuum chamber, and the light absorption heat exchange tube passes through the box body through the general tube and transfers and absorbs heat with the outside through a heat-conducting medium in the tube. By adopting the reflecting trench type large-area vacuum flat plate type solar heat collector, the defects that the solar energy light utilization of the vacuum trench type solar heat collector is low, the vacuum trench type solar heat collector is not easy to build integrated photovoltaic and the insulating efficiency of the common flat plate type solar heat collector is low are overcome. The applications of the solar heat collector in middle and high temperature fields are expanded, and the solar heat collector can be used in the fields of power generation, refrigeration, seawater desalination, and the like.

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 collection mainly contains concentric double-layer glass vacuum tube heat collectors, and polyurethane thermal insulation flat-plate solar heat collectors. The double-layer glass vacuum 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...

AI Technical Summary

Problems solved by technology

[0003] This invention solves the problem that the heat preservation and heat collection efficiency of existing solar collectors are difficult to coexist well, and combines the advantages of both vacuum tube and flat plate collectors , proposed a vacuum flat plate solar collector with high heat collection efficiency and better heat preservation effect

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