生体模擬型マイクロピラミッド構造を用いた日中放射冷却凝縮器の開発

利用仿生微锥结构开发日间辐射冷却冷凝器

• 批准号: 22KJ0910
• 负责人: CHENG ZHIZHONG
• 金额: $ 1.09万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2023
• 资助国家: 日本
• 起止时间: 2023-03-08 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22KJ0910/
• 关键词: radiative cooling; water harvesting

Passive radiative cooling atmospheric water harvesting (PRC-AWH) is a promising alternative to overcome water scarcity issues as an energy-saving technique. However, it is a challenging task to ensure all-day PRC-AWH operation. Here, we report a self-cleaning, scalable and flexible hierarchical polymer film to achieve continuous (all-day) PRC-AWH which exhibits high solar reflectivity, high emissivity. Owing to its unique hybrid photonic and hierarchical structured surface, the polymer film exhibits high solar reflectivity and ideal infrared emissivity and achieves superb average subcooling throughout the day. Outdoor tests demonstrate that daytime PRC-AWH is realized in natural weather conditions to collect large amounts of water from the atmosphere. Besides, the hierarchical structures ensure the surfaces achieve superhydrophobic surfaces where the dust collected on the surface is cleared out by water droplets.

被动辐射冷却大气集水（PRC-AWH）作为一种节能技术，是克服缺水问题的一种有前途的替代方案。然而，保证PRC-AWH全天候运行是一项艰巨的任务。在此，我们报道了一种自清洁、可扩展且灵活的分层聚合物薄膜，可实现连续（全天）PRC-AWH，具有高太阳反射率、高发射率。由于其独特的混合光子和分层结构表面，聚合物薄膜表现出高太阳反射率和理想的红外发射率，并在全天实现极好的平均过冷度。室外测试表明，白天PRC-AWH可以在自然天气条件下实现，从大气中收集大量的水。此外，分层结构确保表面实现超疏水表面，表面收集的灰尘被水滴清除。

项目成果

Hierarchical Polymer Film for All-day Passive Radiative Cooling Atmospheric Water Harvesting.

用于全天被动辐射冷却大气水收集的分层聚合物薄膜。

• 发表时间: 2022
• 作者: CHENG ZHIZHONG

24-hour radiative dew condenser with superhydrophobic hierarchical structures

具有超疏水分级结构的24小时辐射露冷凝器

• 发表时间: 2022
• 作者: CHENG ZHIZHONG