辐射-蒸发集成式被动冷却木材的设计与性能研究

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中图分类号：S776.05 文献标识码：A DOI：10.7525/j.issn.1006-8023.2025.03.014

Abstract：Inorder tosolve theproblemsofconventionalradiativecoling devices limitedbythetheoretical cooling power limit of and by the inhibition of radiant power by low-temperature condensate on the radiant surface and the intrinsic waterunder high humidityconditions，anasymmetricfunctional structuredesign basedonunidirectionalliquid transport proposes a passvelycooled wood（REW）with radiative refrigeration and evaporative cooling integrated in series.The wood isdelignified byasodium chloritesolution toenhance its hydrophilicity；thenahydrophobic silica/ epoxysolution withhighreflectivityand infrared emisson properties iscoatedonthetopof thehydrophilic woodtoforma hydrophobicradiativecolinglayer，while the hydrophilic woodat thebottomservesasanevaporative coling layer.By virtueof the asymmetric weting design withunidirectional watertransport，low-temperature condensatecanbespontaneouslytransported through theradiation-cooling layertotheevaporative-colinglayer forevaporativecoling，whereas the native water intheevaporative-colinglayeris unable topassthrough theradiation-coolinglayertoinhibitradiation.As a result，basedonthetandem integrationofradiant-evaporativecoling，theREWachieves a maximumcooling powerof （20 during daytime，and even at high humidity of 80 % ，which is more than 2.8 times higher than that ofradiantcooling alone.The potential application of REW inenergy-efficientcoolingof buildings is demonstrated through building models，providing auniversal optimisation strategyforexpanding the practical applicationof passive cooling and new insights into the functional utilisation of wood resources.

Keywords：Radiative cooling；evaporative cooling；integrated；unidirectional water transfer；wood

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