自动开关的动态红外辐射冷却器,可实现三种模式的温度调节
Jinru Liu1, Xiuyan Yan1, Wei Wu1
1National Engineering Research Center for Dyeing and Finishing of Textiles, Innovation Center for Textile Science and Technology, College of Chemistry and Chemical Engineering, Donghua University, Shanghai, 201620, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|September 27, 2025
概括
一个新的动态红外辐射冷却器 (DIRC) 自主切换选择性和宽带红外发射模式. 这使得高效的零能三种模式温度调节可用于各种应用,克服静态设计的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 热力学是一种热力学.
背景情况:
- 被动辐射冷却提供零能量散热,但静态光子结构受到固定光谱特性的限制.
- 不同的热环境需要不同的红外辐射光谱,这阻碍了静态冷却器在多场景环境中的应用.
研究的目的:
- 提出一种自开关的动态红外辐射冷却器 (DIRC),能够进行三种模式的温度调节.
- 为了实现适应性光谱转换,用于环境下,近环境和环境以上的冷却应用.
主要方法:
- 利用温度触发的水分子在热敏水凝中的定向迁移.
- 设计一个DIRC,使选择性和宽带红外辐射之间的光谱转换.
- 描述DIRC性能,包括发射率,太阳反射率和光谱过渡响应时间.
主要成果:
- DIRC具有高宽带发射率 (94.1%在2.5-25微米范围内) 和选择性发射率 (81.6%在8-13微米范围内).
- 在光谱转换过程中,太阳反射率保持稳定,在90%左右.
- 快速,自主的光谱转换发生在37.3-85.6秒内,在35-45°C的温度范围内.
结论:
- DIRC实现了显著的冷却性能:9.5°C的下环境,7.0°C的近环境和6.9°C的上环境.
- 这种动态方法克服了对单场景和依赖天气的应用的静态设计的局限性.
- DIRC提供了一种多功能策略,用于在广泛的应用中实现三种模式的热调节.
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