Angularly selective thermal emitters for deep subfreezing daytime radiative cooling

doi:10.1515/nanoph-2022-0032

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	Angularly selective thermal emitters for deep subfreezing daytime radiative cooling
	S. K. Chamoli; W. Li; C. L. Guo and M. ElKabbash
	2022
发表期刊	Nanophotonics
ISSN	2192-8606
卷号	11 期号:16 页码:3709-3717
摘要	We theoretically analyze the impact of angular selectivity on the radiative cooling performance of thermal emitters. We investigate the effect of spectral selectivity, environmental conditions, and parasitic heating on the minimum possible equilibrium temperature of the thermal emitter. We show that combining angular and spectral selectivity is necessary to reach deep subfreezing temperatures. We also show that angularly selective thermal emitters increase the cooling performance in humid environments, however, they require management of nonradiative heat transfer processes. We introduce a general scheme to realize angularly and spectrally selective absorption/emission using a thin film stack consisting of an angle dependent transmission filter overlayed on a selective thermal emitter. The thermal emitter total thickness is similar to 16 mu m, an order of magnitude less than previously proposed angular selective thermal emitters/absorbers and operates under s- and p-polarized light without using anisotropic layers. Under realistic conditions and reasonable parasitic heating, the proposed emitter can be cooled down to Delta T = -46 degrees C below ambient temperature. Our work highlights the advantages and drawbacks of angular selective thermal emitters towards practical and efficient radiative cooling devices.
DOI	10.1515/nanoph-2022-0032
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收录类别	sci ; ei
语种	英语
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/66418
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	S. K. Chamoli,W. Li,C. L. Guo and M. ElKabbash. Angularly selective thermal emitters for deep subfreezing daytime radiative cooling[J]. Nanophotonics,2022,11(16):3709-3717.
APA	S. K. Chamoli,W. Li,&C. L. Guo and M. ElKabbash.(2022).Angularly selective thermal emitters for deep subfreezing daytime radiative cooling.Nanophotonics,11(16),3709-3717.
MLA	S. K. Chamoli,et al."Angularly selective thermal emitters for deep subfreezing daytime radiative cooling".Nanophotonics 11.16(2022):3709-3717.

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