All-day radiative cooling using a grating-patterned PDMS film emitter

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dc.contributor.authorChoi, Minwooko
dc.contributor.authorSeo, Junyongko
dc.contributor.authorYoon, Siwonko
dc.contributor.authorNam, Youngsukko
dc.contributor.authorLee, Jungchulko
dc.contributor.authorLee, Bong Jaeko
dc.date.accessioned2022-07-26T03:00:17Z-
dc.date.available2022-07-26T03:00:17Z-
dc.date.created2022-07-26-
dc.date.issued2022-09-
dc.identifier.citationAPPLIED THERMAL ENGINEERING, v.214-
dc.identifier.issn1359-4311-
dc.identifier.urihttp://hdl.handle.net/10203/297481-
dc.description.abstractFor passive radiative cooling applications, all-day harvested cold energy is an essential performance indicator concerning its long-term and continuous operation. To this end, high mid-infrared emissivity of emitter surface is a key parameter for steadily boosting the net cooling power regardless of the time-varying environment. In this work, hexagonal-array grating-patterned PDMS film on a silver reflector is proposed for efficient 'all-day' radiative cooling. The optimized grating structure achieves the weighted emissivity of 0.985 in the atmospheric transparent window with the solar reflectivity of 0.933, leading to the predicted all-day average cooling power of 85 ~ 130 W/m(2). We also show from outdoor experiments that the proposed structure can produce 4.1 6.3 W/m(2) extra all-day cooling power compared to a flat PDMS emitter. Furthermore, the grating-patterned surface introduces self-cleaning feature that is desirable for long-term usage.-
dc.languageEnglish-
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD-
dc.titleAll-day radiative cooling using a grating-patterned PDMS film emitter-
dc.typeArticle-
dc.identifier.wosid000823308500005-
dc.identifier.scopusid2-s2.0-85132224251-
dc.type.rimsART-
dc.citation.volume214-
dc.citation.publicationnameAPPLIED THERMAL ENGINEERING-
dc.identifier.doi10.1016/j.applthermaleng.2022.118771-
dc.contributor.localauthorNam, Youngsuk-
dc.contributor.localauthorLee, Jungchul-
dc.contributor.localauthorLee, Bong Jae-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorAll-day radiative cooling-
dc.subject.keywordAuthorHexagonal-array grating-patterned PDMS film-
dc.subject.keywordAuthorHeat flux measurement-
dc.subject.keywordAuthorSelf cleaning-
dc.subject.keywordPlusPERFORMANCE-
dc.subject.keywordPlusSURFACES-
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ME-Journal Papers(저널논문)
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