Solar heat collection body and sunlight heat power generation module

Abstract

The invention provides a solar heat collection body and sunlight heat power generation module. The solar heat collection body can prevent the interlayer stripping caused by interface thermal stress at the circulating environment of low infrared absorption ratio, corrosion at high-temperature atmospheric environment, low device lifetime and large temperature drop height in the solar heat collection structure, and the infrared wavelength region absorbed by radiation is supplied to the thermoelectric power generation component. The solar heat collection body is formed by a metallic material basemetal(13) with high-heat conductivity, an infrared absorption film (14) formed on the base metal surface by the non-oxidized substance ceramic with high infrared wavelength region absorption ratio, agradient layer (15) formed between the metallic material base metal(13) and the infrared absorption film (14) to changed the mixing ratio of the metallic material as the base metal and the infrared absorption film forming material, and a hollow space (16) provided on the solar heat irradiation surface of the solar heat collection body whose depth achieves the center part of the heat collection body.

Description

technical field [0001] The present invention relates to a solar heat collector in a solar-thermal composite power generation system that absorbs light in the infrared wavelength region of sunlight and collects it as heat energy, and supplies heat energy to a thermoelectric power generation system that uses heat energy as a heat source, and The heat collector structure of the solar thermal power generation module using the solar heat collector. Background technique [0002] In the past, as a device for efficiently converting sunlight energy into electrical energy, a solar-thermal hybrid power generation system has been proposed (see Patent Documents 1 and 2), which has a solar cell and a thermoelectric power generation element that convert sunlight energy into electrical energy. The infrared selective transmission film (wavelength selective reflection and transmission film) is used to separate sunlight into infrared rays and visible rays, so that visible rays can be irradiate...

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Problems solved by technology

[0007] Then, the problem to be solved by the present invention is: (1) solve the problem of low infrared absorption rate existing in the solar heat collector of high thermal conductivity metal material; (2) solve the problem of graphite heat collector, graphite coating high thermal conductivity metal The heat collector of the material has the problems of erosion in high-temperature atmospheric environment and low device life; (3) Solve the problem of the heat collector of the graphite-coated metal material with high thermal conductivity in a cycle environment with a large temperature drop The problem of graphite layer peeling caused by thermal stress at the interface with the graphite layer; (4) The irradiated and absorbed solar heat (in the infrared wavelength region) can be efficiently supplied to the thermoelectric power generation element

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