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Spectrum Selective Thermal Radiator and Its Design Method

A heat radiator and design method technology, applied in the field of heat radiation, can solve problems such as high temperature recession, achieve the effects of reducing manufacturing costs, overcoming cumbersome design and manufacturing, and high thermal stability

Active Publication Date: 2021-06-22
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing spectrally selective heat radiators are structural spectrally selective heat radiators. This type of heat radiator often suffers from high-temperature decay due to various factors such as structural collapse and material phase change at high temperatures.

Method used

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  • Spectrum Selective Thermal Radiator and Its Design Method
  • Spectrum Selective Thermal Radiator and Its Design Method
  • Spectrum Selective Thermal Radiator and Its Design Method

Examples

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Embodiment 1

[0046] Such as figure 1 As shown, a material-type spectrally selective heat radiator is a one-dimensional layered structure, which is composed of a first layer 1, a second layer 2, a third layer 3 and a substrate 4 arranged in sequence from top to bottom, Wherein, both the first layer 1 and the third layer 3 are hafnium oxide layers, and the second layer 2 is a hafnium oxide layer distributed with a plurality of erbium oxide nanoparticles 5 . The thickness of the first layer 1 and the third layer 3 is 100 nm, and the thickness of the second layer 2 is 400 nm. The substrate 4 is a molybdenum substrate, and its size is 10mm×10mm×0.3mm. The particle size r=20nm of erbium oxide nanoparticles, its doping amount f in the second layer v = 0.1, 0.3 or 0.5.

[0047] The material-type hafnium oxide-doped erbium oxide particle spectrum selective heat radiator is prepared by radio frequency magnetron sputtering, using HfO with a purity of 99.99%. 2 and Er 2 o 3 Target material, the ...

Embodiment 2

[0049] In the material-type spectrally selective thermal radiator, the optical constants of the functional layer doped with nanoparticles are usually difficult to determine, which is not conducive to the calculation of the overall optical properties of the subsequent thermal radiator. Therefore, using the effective medium theory and the transfer matrix method to calculate the optical characteristics of the spectrally selective thermal radiator doped with nanoparticles as a function of the doping amount and particle size of the nanoparticles in the functional layer, can effectively reflect the overall optical properties of the radiator. Changes in characteristics, and predict the future performance of the heat radiator.

[0050] Based on this, the present invention discloses a design method of the material-type spectrally selective thermal radiator in Embodiment 1, such as figure 2 shown, including the following steps:

[0051] 1) Determine hafnium oxide (HfO 2 ) of the refr...

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Abstract

The invention relates to a spectrally selective thermal radiator and a design method thereof. The spectrally selective thermal radiator of the present invention is a one-dimensional layered structure, which includes a first layer, a second layer and a third layer arranged in sequence. The first layer and the third layer are hafnium oxide layers, and the second layer is a hafnium oxide layer distributed with a plurality of erbium oxide nanoparticles. The heat radiator designed in the present invention is a material-type spectrally selective heat radiator with selective emissivity. Compared with traditional structural heat radiators, material heat radiators have very high thermal stability and no oxidation, which can fundamentally eliminate the problem of high temperature decay in structural heat radiators. The invention has the characteristics of accuracy and high efficiency, and can comprehensively reveal the change law of the spectral emission characteristics of the material-type hafnium oxide-doped erbium oxide particle selective thermal radiator with the amount of erbium oxide doping and the size of the erbium oxide doping particles, and It lays the foundation for the practical application of high temperature selective radiators.

Description

technical field [0001] The invention relates to the technical field of heat radiation, in particular to a spectrally selective heat radiator and a design method thereof. Background technique [0002] Solar thermal photovoltaic (STPV for short) system is an efficient thermoelectric conversion technology that can directly convert high-temperature heat radiation generated by sunlight into electrical energy. The STPV system usually consists of four parts: concentrator, absorber, radiator and thermal photovoltaic cells. The temperature of the collected sunlight rises and the heating radiator emits thermal radiation energy, and the thermal radiation energy falling under the forbidden band width of the thermal photovoltaic cell is converted into electrical energy by the thermal photovoltaic cell. The theoretical conversion efficiency of STPV system is high, and solar energy can be used efficiently, so it has great application prospects in commercial, civil and military fields. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/22G06F30/20G06F119/08H10N10/855
CPCG06F2119/08G06F30/20H10N10/855G06F2111/10
Inventor 蔡琦琳吴玺张蓥石叶庆范学良邓业林赵威风
Owner SUZHOU UNIV
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