一种智能热门双层膜,用于适应温度的辐射冷却和太阳能加热
Xinzhe Min1, Xueyang Wang1, Jinlei Li1
1National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China.
Science bulletin
|August 20, 2023
概括
一个新的智能热门膜提供自动,适应温度的辐射冷却和太阳能供暖. 这种被动装置显著降低了气候控制的能源消耗,为可持续的能源解决方案铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 可持续能源 可持续能源
背景情况:
- 传统的冷却和加热系统是能源密集型的,有助于高碳足迹.
- 现有的被动辐射冷却和太阳能加热设备往往是静态和单一功能,限制了它们的适用性.
- 有需要的动态,适应性被动设备,可以满足不同的热管理要求.
研究的目的:
- 开发一种智能热门 (STG) 双层膜,用于自动,适应温度的辐射冷却和太阳能供热.
- 为了证明设备能够根据环境温度切换光学特性.
- 评估这种可切换冷却/加热技术的节能潜力.
主要方法:
- 智能热门 (STG) 双层膜的制造.
- 在不同温度下表征膜的光学特性 (反射率和发射率).
- 在模拟的阳光下对设备的辐射冷却和太阳能加热性能进行实验测试.
- 与传统方法相比,对节能潜力的理论分析.
主要成果:
- 在~30°C以下的太阳光谱中,STG膜在反射 (0.962) 和吸收 (0.059) 状态之间表现出温度适应的切换.
- 中红外发射率始终高 (~0.95),对于辐射冷却至关重要.
- 在直接阳光下达到~5°C的环境温度 (>900 W m−2) 和~550 W m−2的太阳能供热功率.
- 理论分析表明,与仅冷却或仅供热的策略相比,可以节省大量的能源.
结论:
- 开发的STG膜为动态热管理提供了一种新的零能耗解决方案.
- 这项技术为设计具有双重辐射冷却和太阳能加热功能的温度适应器件提供了一条途径.
- 该STG膜通过被动气候控制来实现可持续能源的创新方法.
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