Spherical cavity type solar heat absorber with inwardly concave glass cover

Abstract

The invention discloses a spherical cavity type solar heat absorber with an inwardly concave glass cover. The heat absorber is mainly used for collecting sunlight and converting the sunlight into heat energy in a butterfly type solar high-temperature heat utilization system. The heat absorber mainly comprises a heat exchange coil pipe, the inwardly concave glass cover, an outer shell, an inner shell, a vacuum layer, a reflective wind shield and a heat conductive fluid. Different from the traditional opening type heat absorber and the cavity type heat absorber with the glass window at the cavity opening, the cavity type heat absorber disclosed by the invention is the opening type spherical heat absorber with the inwardly concave glass cover, therefore, the cavity type heat absorber not only has the light capturing capacity of the opening cavity type heat absorber but also has low heat loss of the cavity type heat absorber with the glass window at the cavity opening; meanwhile, the cavity type heat absorber is provided with the reflective wind shield, therefore, the capturing on deviated light can be strengthened, and the heat radiation on the inner wall and the convection heat transfer loss resulted from external natural wind can be reduced; and the cavity type heat absorber comprises the vacuum layer between the inner shell and the outer shell, therefore, the lost heat through the shells can be effectively reduced.

Description

technical field [0001] The invention relates to a cavity-type solar heat absorber, in particular to a high-efficiency spherical cavity-type heat absorber with a concave glass cover applied in a butterfly-type solar high-temperature heat utilization system. Background technique [0002] With the progress and development of social production and the improvement of people's living standards, the demand for energy will increase substantially. The current global primary energy composition is mainly composed of fossil fuels, but as the non-renewable energy of the earth, on the one hand, fossil fuels will be exhausted in the near future, and on the other hand, the use of a large number of fossil fuels has caused environmental pollution and ecological damage. Seriously threaten people's health. Therefore, the development and utilization of new energy is in line with the sustainable development strategy. Solar energy is the energy produced by the continuous nuclear fusion process i...

AI Technical Summary

Problems solved by technology

[0008] In short, there are many types of cavity heat absorbers, but there is a lack of cavity heat absorbers with high light-to-heat conversion efficiency, simple structure, and wide application range. The field of high-temperature heat utilization of butterfly solar energy is in urgent need of high-efficiency cavity heat absorbers.

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