Light concentration type full glass solar heat collection pipe

Abstract

The invention discloses a condensing all-glass solar energy heat collecting tube and relates to a solar energy light-heat conversion element which belongs to the structure technical field of the heat collecting tubes. The condensing all-glass solar energy heat collecting tube of the invention comprises an inner glass tube and an outer glass tube which are mutually packaged at one end, vacuum pumping is carried out between the inner and the outer glass tubes, a heat absorbing film is arranged on the outer surface of the inner glass tube, a reflection part is arranged between the inner and the outer glass tubes, and the condensing all-glass solar energy heat collecting tube is characterized in that the outer diameter of the inner glass tube is one sixth to one half of the outer diameter of the outer glass tube, and the inner glass tube is eccentric to the outer glass tube for arrangement. As the arrangement, the inner glass tube of the invention can be made smaller relative to the diameter of the outer glass tube, thereby being conductive to the timely output of heat energy, improving thermal efficiency, having the advantages of high thermal efficiency, simple process, low cost and no ash accumulation on reflective boards, etc., and being widely applied to solar heating and cooling, seawater desalination and other related fields.

Description

technical field [0001] The invention relates to the structural technical field of a solar light-to-heat conversion element—a heat collecting tube. Background technique [0002] There are two structural forms of all-glass vacuum heat collecting tubes. The first generation is: inner and outer glass tubes with one end sealed to each other, and the vacuum is drawn between them. The two glass tubes are arranged concentrically, and the outer surface of the inner glass tube is set. Heat absorbing film. In order to maximize the exposure to light, this product needs to have the largest possible inner glass outer surface area. Its defect is: because there are many heat transfer mediums stored in the inner glass tube, the heat cannot be conducted out in time, and the heat utilization rate is not high. The second generation is based on the first-generation product, which uses a light-concentrating reflective film or a light-condensing reflective plate to converge the reflected light t...

AI Technical Summary

Problems solved by technology

The disadvantage is: due to the large amount of heat transfer medium in the inner glass tube, the heat cannot be conducted out in time, and the heat utilization rate is not high.

However, since the current inner and outer glass tubes are still concentrically arranged, smaller inner glass tubes cannot be made. Therefore, the conduction efficiency of the second-generation products cannot be improved much compared with the first-generation products, which limits the application of solar thermal conversion in various fields. Applications

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