A Janus emitter for passive heat release from enclosures

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Passive radiative cooling functions by reflecting the solar spectrum and emitting infrared waves in broadband or selectively. However, cooling enclosed spaces that trap heat by greenhouse effect remains a challenge. We present a Janus emitter (JET) consisting of an Ag-polydimethylsiloxane layer on micropatterned quartz substrate. The induced spoof surface plasmon polariton helps overcome inherent emissivity loss of the polymer and creates near-ideal selective and broadband emission on the separate sides. This design results in not only remarkable surface cooling when the JET is attached with either side facing outwards but also space cooling when used as an enclosure wall. Thus, the JET can passively mitigate the greenhouse effect in enclosures while offering surface cooling performance comparable to conventional radiative coolers.
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Issue Date
2020-09
Language
English
Article Type
Article
Citation

SCIENCE ADVANCES, v.6, no.36, pp.eabb1906

ISSN
2375-2548
DOI
10.1126/sciadv.abb1906
URI
http://hdl.handle.net/10203/277079
Appears in Collection
ME-Journal Papers(저널논문)
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