Selective absorption cavity heat collector

A heat collector and selective technology, applied in heating devices, solar thermal devices, solar thermal power generation, etc., can solve problems such as the inability to apply cavity collectors, cost reduction, and restrictions on the photothermal conversion efficiency of solar thermal power generation systems , achieve the effect of overcoming fatal defects, suppressing infrared radiation, and overcoming low absorption rate of solar spectrum

Inactive Publication Date: 2014-02-12
YIKEBO ENERGY TECH SHANGHAI
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  • Abstract
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Problems solved by technology

However, the emissivity of the three-dimensional nanocomposite selective absorbing coating is about 0.13, and the transition zone is wide, coupled with the radiation characteristics of the cavity collector, this selective absor...

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  • Selective absorption cavity heat collector
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  • Selective absorption cavity heat collector

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Embodiment Construction

[0024] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings. The same or similar components in the figures are denoted by the same reference numerals.

[0026] figure 1 , figure 2 and image 3 The preferred embodiments of the selective absorption cavity collectors of the present invention are shown respectively. figure 1 , figure 2 It is a schematic diagram of the structure of the heat collecting cavit...

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Abstract

The invention relates to the technical field of solar thermal power generation and discloses a selective absorption cavity heat collector. The selective absorption cavity heat collector comprises a heat collecting cavity body and a selective absorption coating coated at the heat absorption surface of the heat collecting cavity body; the selective absorption coating comprises a metal reflection layer and a semiconductor absorption layer formed on the metal reflection layer. The selective absorption cavity heat collector overcomes the fatal defect of the low absorption rate of a semiconductor material for a solar energy spectrum and fully plays the advantages that the semiconductor can be provided with a cutoff slope and has small negative influence on the low infrared emittance of a good metal, so the high-temperature, efficient and spectrum selective heat collector which can furthest absorb the solar energy spectrum and inhibit the infrared radiation under the high-temperature condition is formed.

Description

technical field [0001] The invention relates to the technical field of solar thermal power generation, in particular to a selective absorption chamber type heat collector. Background technique [0002] Concentrated solar thermal power generation is the only low-carbon renewable energy that can achieve low-cost heat storage, dispatchable, and even uninterrupted power generation. The key to focused solar thermal power generation is how to reduce the solar cosine loss of the solar furnace and increase the absorption rate of sunlight, maximize the conversion of the broadband solar spectrum into heat energy, and reduce the radiation area (increase the focusing ratio) and reduce the radiation rate Minimizes black body radiation and convective heat loss through transparent windows. The reduction of cosine loss and radiation area can be achieved by selecting the tracking focus mode of the system, while the improvement of absorption rate and reduction of radiation rate need to rely ...

Claims

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Application Information

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IPC IPC(8): F24J2/48
CPCY02E10/40
Inventor 项晓东张融
Owner YIKEBO ENERGY TECH SHANGHAI
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