高导热辐射冷却膜,增强日间被动冷却效果
High-Thermal-Conductivity Radiative Cooling Films for Enhanced Passive Daytime Cooling
中文简介
被动式日间辐射冷却(PDRC)技术依靠反射携带高能量的太阳可见光,将表面热量辐射到长波红外波段的低温冷背景,从而实现清洁节能冷却。然而,高通量热流的不可逆性在实际应用中常存在,导致辐射冷却产生的冷却效果无法最大化。在这项研究中,我们通过在 RC 界面内战略性地构建内部热通道,开发了一种具有高导热性的集成辐射冷却(RC)膜,以实现高效冷却(DPHA 膜)。与室内室内温度相比,DPHA 薄膜具有优越的光学性能(反射率∼0.96,发射率∼0.98),在太阳强度为 977 W m-2 的情况下,最大温差为 17.5 °C,平均温差为 13.2 °C。冷却效果比市售的高反射铝漆低 8.5 °C,比同类冷却器低 5.2 °C。导热系数测试表明,DPHA 薄膜具有较高的面外导热系数(0.755 W m-1 K-1),通过与环境形成热梯度,促进了表面热量的辐射散发。经过 30 d 的连续强紫外照射实验,得
英文摘要(原文)
Passive daytime radiative cooling (PDRC) technology relies on reflecting solar visible light that carries high energy and radiating surface heat to a low-temperature cold background in the long-wave infrared band, thereby achieving clean energy-saving cooling. However, the irreversibility of high flux heat flow is often present in practical applications, resulting in the inability to maximize the cooling
题录(GB/T 7714)
Nie S, Bai L, Lin G, 等. High-Thermal-Conductivity Radiative Cooling Films for Enhanced Passive Daytime Cooling[J]. ACS Applied Materials & Interfaces, 2025. DOI: 10.1021/acsami.5c14348.
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