一个Janus智能窗口用于适应温度的辐射冷却和可调节的太阳能发射率
Zuowei Zhang1, Meina Yu2, Cong Ma3
1Institute for Advanced Materials and Technology, University of Science and Technology, Beijing, 100083, People's Republic of China.
Nano-micro letters
|April 26, 2025
概括
研究人员开发了一种新的Janus智能窗口,具有可切换的红外发射率和太阳能调制,以节省能源. 这种先进的窗口提供了显著的冷却功率和电磁屏蔽,性能优于传统材料.
科学领域:
- 材料科学 材料科学 材料科学
- 能源科学 能源科学
- 光学是什么?光学是什么?光学是什么?
背景情况:
- 开发具有有效温度调节的智能窗户对于能源效率至关重要.
- 现有的智能窗户技术在管理太阳能和红外热传输方面往往存在局限性.
研究的目的:
- 提出并准备一个具有可切换红外发射率和太阳能调制的Janus智能窗口.
- 评估开发的Janus窗口的温度调节性能和节能潜力.
主要方法:
- 使用聚合物稳定液晶薄膜和热色材料制造Janus窗户.
- 户外实验用于测量照明下的室内温度变化.
- 用于计算冷却功率的 MATLAB 模拟.
- 用于电磁屏蔽的导电层的修改.
- 能量模拟将Janus窗口与其他材料进行比较.
主要成果:
- 雅努斯窗口展示了可切换的前长波红外辐射和太阳能调制.
- 户外实验显示,室内温度白天下降8°C,夜晚下降5°C.
- 模拟显示,白天的冷却功率为93Wm−2,夜间的冷却功率为142Wm−2.
- 修改后的导电层有效地屏蔽了X波段电磁辐射.
- 能源模拟证实,与单层聚合物稳定液晶,聚N-异烯酸胺和不同气候区的普通玻璃相比,更高的节能效果.
结论:
- 开发的Janus窗口为先进的温度调节和节能提供了一个有前途的解决方案.
- 它能够切换发射率和调节太阳能传输的能力使其适合各种季节性要求.
- 该设备的额外电磁屏蔽能力扩大了其应用潜力.
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