自主和绝缘的辐射/蒸发冷却器用于白天的环境下被动冷却
Li Yu1,2, Yimou Huang1, Yanwei Zhao3
1School of Energy Science and Engineering, Central South University, Changsha 410083, China.
ACS applied materials & interfaces
|January 26, 2024
概括
这项研究引入了一种新型的自我维持和绝缘辐射/蒸发冷却器 (SIREC). 这种被动冷却技术通过结合辐射和蒸发方法来节省能源,提供了有效的白天下环境冷却.
科学领域:
- 材料科学 材料科学 材料科学
- 热力学是一种热力学.
- 可持续能源 可持续能源
背景情况:
- 被动冷却对于节能至关重要,但当前的技术在与持续的白天下环境温度和长期蒸发作斗争.
- 现有的辐射冷却器在平衡太阳反射和热发射方面存在局限性,而蒸发冷却器则需要持续供水.
研究的目的:
- 开发一种自给自足且绝缘的辐射/蒸发冷却器 (SIREC),克服现有的被动冷却系统的局限性.
- 研究一种新型冷却器的性能,该冷却器集成辐射和蒸发式冷却机制,以增强下环境冷却.
主要方法:
- 一个多层冷却器的制造,包括一个多孔聚乙烯薄膜 (P-PE),一个空气层和一个含化 (PLH) 的聚乙烯酒精) 水凝.
- 关于P-PE光学特性 (太阳反射率,红外透射率) 和蒸汽透性的描述.
- 通过集成的辐射和蒸发传热机制评估SIREC的冷却性能,包括PLH收集大气中的水.
主要成果:
- 该P-PE层表现出高太阳反射率 (0.91) 和长波红外发射率 (0.92),促进了天空辐射冷却.
- 该P-PE表现出极好的蒸汽透性 (579s m-1),使PLH能够有效地蒸发冷却.
- 由于PLH能够收集大气中的水,因此可以保证白天蒸发式冷却的自给自足运行,而隔热气层则有助于增强这一功能.
结论:
- 开发的SIREC有效地整合了辐射和蒸发冷却,以获得卓越的白天下环境性能.
- 自给自足的性质和高效的传热机制凸显了这种被动冷却技术的潜力.
- 在节能冷却应用中,SIREC显示出广泛采用的前景.
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