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Thermal management ...
Thermal management with a highly emissive and thermally conductive graphite absorber
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- Guo, Tingbiao (author)
- Zhejiang Univ, Coll Opt Sci & Engn, Ctr Opt & Electromagnet Res, Hangzhou 310058, Zhejiang, Peoples R China.
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- Sun, Yaoran (author)
- Zhejiang Univ, Coll Opt Sci & Engn, Ctr Opt & Electromagnet Res, Hangzhou 310058, Zhejiang, Peoples R China.
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- Evans, Julian (author)
- Zhejiang Univ, Coll Opt Sci & Engn, Ctr Opt & Electromagnet Res, Hangzhou 310058, Zhejiang, Peoples R China.
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- Wang, Nan (author)
- Zhejiang Univ, Coll Opt Sci & Engn, Ctr Opt & Electromagnet Res, Hangzhou 310058, Zhejiang, Peoples R China.
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- Fu, Yang (author)
- Zhejiang Univ, Coll Opt Sci & Engn, Ctr Opt & Electromagnet Res, Hangzhou 310058, Zhejiang, Peoples R China.
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- He, Sailing (author)
- KTH,Elektroteknisk teori och konstruktion,Zhejiang Univ, Coll Opt Sci & Engn, Ctr Opt & Electromagnet Res, Hangzhou 310058, Zhejiang, Peoples R China
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Zhejiang Univ, Coll Opt Sci & Engn, Ctr Opt & Electromagnet Res, Hangzhou 310058, Zhejiang, Peoples R China Elektroteknisk teori och konstruktion (creator_code:org_t)
- AMER INST PHYSICS, 2019
- 2019
- English.
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In: AIP Advances. - : AMER INST PHYSICS. - 2158-3226. ; 9:2
- Related links:
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https://aip.scitatio...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Thermal management on a variety of length scales is essential for many industrial, solar and computational systems. Here we explore the thermal properties of a nearly perfect graphite absorber with both high emissivity and thermal conductivity which is fabricated by simple one-step etching. The hemispherical reflectance of the absorber is around 1% in the visible range and the normal specular reflectance is less than 1% from 1.5 mu m to 10 mu m. The thermal conductivity of the absorber is measured above 630 Wm(-1) K-1, which is 2.5 times larger than the aluminum used in commercial heat sinks. Heat dissipation testing indicates that a device is 3.7 +/- 2 degrees cooler with the graphite absorber as the heat spreader than a pristine graphite sheet and 9.1 +/- 2 degrees cooler than an Au-coated graphite sheet, primarily due to improved radiation cooling. A theoretical analysis accounts for the results. Further analysis suggests that the radiative heat dissipation is more prominent in the low-convection environment, especially for a convection coefficient below 10 Wm(-2) K-1.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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