森林工程2025，Vol.41Issue(3)：578-584,7.DOI:10.7525/j.issn.1006-8023.2025.03.014
辐射-蒸发集成式被动冷却木材的设计与性能研究
Design and Performance Study of Radiation Evaporation Integrated Passive Cooling Wood
摘要
Abstract
In order to solve the problems of conventional radiative cooling devices limited by the theoretical cooling power limit of 150 W/m2 and by the inhibition of radiant power by low-temperature condensate on the radiant surface and the intrinsic water under high humidity conditions,an asymmetric functional structure design based on unidirectional liq-uid transport proposes a passively cooled wood(REW)with radiative refrigeration and evaporative cooling integrated in series.The wood is delignified by a sodium chlorite solution to enhance its hydrophilicity;then a hydrophobic silica/epoxy solution with high reflectivity and infrared emission properties is coated on the top of the hydrophilic wood to form a hydrophobic radiative cooling layer,while the hydrophilic wood at the bottom serves as an evaporative cooling layer.By virtue of the asymmetric wetting design with unidirectional water transport,low-temperature condensate can be spontane-ously transported through the radiation-cooling layer to the evaporative-cooling layer for evaporative cooling,whereas the native water in the evaporative-cooling layer is unable to pass through the radiation-cooling layer to inhibit radiation.As a result,based on the tandem integration of radiant-evaporative cooling,the REW achieves a maximum cooling power of 214 W/m2 during daytime,and 172 W/m2 even at high humidity of 80%,which is more than 2.8 times higher than that of radiant cooling alone.The potential application of REW in energy-efficient cooling of buildings is demonstrated through building models,providing a universal optimisation strategy for expanding the practical application of passive cooling and new insights into the functional utilisation of wood resources.关键词
辐射冷却/蒸发冷却/集成式/单向水传输/木材Key words
Radiative cooling/evaporative cooling/integrated/unidirectional water transfer/wood分类
农业科技引用本文复制引用
陈鹏宇,刘薇,王稳升,许冬男,常少聪,孙壮志..辐射-蒸发集成式被动冷却木材的设计与性能研究[J].森林工程,2025,41(3):578-584,7.基金项目
国家自然科学基金项目(51905085/52175266). （51905085/52175266）
