为解决传统辐射制冷器件受限于150 W/m²的理论冷却功率极限以及受高湿度条件下辐射表面低温冷凝水与本体水对辐射功率抑制的问题，基于单向液体传输的非对称功能结构设计提出一种辐射制冷与蒸发冷却串联集成的被动冷却木材（REW）。通过亚氯酸钠溶液对木材进行脱木质素处理，以提高其亲水性；然后将具备高反射率和红外发射性能的疏水性二氧化硅/环氧树脂溶液涂覆在亲水木材的顶部，形成疏水性辐射冷却层，而底部的亲水木材则作为蒸发冷却层。凭借单向水输运的非对称润湿设计，低温冷凝水可自发穿过辐射制冷层传输至蒸发冷却层用于蒸发冷却，而蒸发冷却层中的本体水却无法透过辐射冷却层抑制辐射。因此，基于辐射-蒸发冷却的串联集成，REW在日间的最大冷却功率达到214 W/m²。即使在80%高湿度条件下，REW的冷却功率也到达172 W/m²，较单一辐射制冷提高2.8倍以上。通过建筑模型演示REW在建筑节能冷却中的应用潜力，为拓展被动冷却的实际应用提供普适性优化策略，并为木质资源功能化利用提供新的见解。

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 liquid 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 spontaneously 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.