Enhancing the radiative heat dissipation from high-temperature SF6gas plasma by using selective absorbers
| Autor: | Hiroo Yugami, Shinichiro Tsuda, Katsuhiko Horinouchi |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Acoustics and Ultrasonics Radiative cooling Passive cooling 02 engineering and technology Plasma Dissipation 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Dielectric gas Surfaces Coatings and Films Electronic Optical and Magnetic Materials Computational physics Radiative equilibrium 0103 physical sciences Radiative transfer Atomic physics 0210 nano-technology Astrophysics::Galaxy Astrophysics Photonic crystal |
| Zdroj: | Journal of Physics D: Applied Physics. 50:365601 |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/1361-6463/aa7fd5 |
| Popis: | Radiative cooling accomplished by tailoring the properties of spectral thermal emission is an interesting method for energy harvesting and high-efficiency passive cooling of terrestrial structures. This strategy, however, has not been extended to cool enclosed heat sources, common in engineering applications, and heat sources in high-temperature environments where radiative transfer plays a dominant role. Here we show a radiative cooling scheme for a high-temperature gaseous medium, using radiative heat extraction with selective absorbers matched to the gas-selective emission properties. We used SF6 gas plasma as a model, because this gas is used in gas circuit breakers, which require effective cooling of the hot insulating gas. Our theoretical analysis confirms that a copper photonic absorber, matched to the ultraviolet-to-near-infrared-selective emission properties of the gas, effectively extracts heat from the high-temperature gas plasma and lowers the radiative equilibrium gas temperature by up to 1270 K, exceeding both blackbody-like and metallic surfaces in practical operating conditions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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