一个Janus光谱选择性玻璃面向全季节能高效窗户
Jingkai Huang1,2,3, Liming Yuan1,2, Jianming Liao1,2
1National Key Laboratory of Optical Field Manipulation Science and Technology, Chinese Academy of Sciences, Chengdu, 610209, China.
Small (Weinheim an der Bergstrasse, Germany)
|October 22, 2024
概括
一个新的Janus玻璃在被动辐射冷却和加热之间切换,保持自然光线. 这种创新的窗户技术显著降低了建筑物的能耗,并防止了雾,提高了能源效率.
科学领域:
- 材料科学 材料科学 材料科学
- 建筑物理 建筑物理
- 可持续能源 可持续能源
背景情况:
- 节能窗户对于降低建筑能耗和温室气体排放至关重要.
- 在窗户中平衡自然光线和全季度的热管理仍然是一个挑战.
研究的目的:
- 开发和评估一个能够在被动辐射冷却和加热之间切换的Janus玻璃系统,同时保持自然光传输.
- 评估拟议的Janus窗户的热性能和节能潜力,与传统的低排放 (低e) 窗户相比.
主要方法:
- 制造具有独特光学性能的Janus玻璃,用于冷却和加热模式.
- 测量可见透射率,近红外 (NIR) 反射率/吸收率和中红外 (MIR) 发射率.
- 户外测试用于评估室温变化,并将性能与商业低电能窗户进行比较.
- 对光热效应对表面温度和降低雾的分析.
主要成果:
- 简斯窗口的可见透射率为0.47.
- 它实现了高的NIR反射率/吸收率 (0.75/0.71) 和可调的MIR发射率 (0.94用于冷却,0.13用于加热).
- 户外测试显示,与低电能窗户相比,室内冷却降低了7.1°C,室内加热增加了0.4°C,在整个中国,潜在的节能率为13%-53%.
- 光热效应使表面温度提高了6.1°C,减少了雾.
结论:
- 拟议的Janus玻璃有效地平衡了自然光与可切换的被动辐射冷却和加热.
- 这项技术为降低建筑能耗和提高室内舒适度提供了巨大的潜力.
- 雅努斯窗户减少雾的能力进一步提高了其在各种气候和环境中的适用性.
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