Study of a PDMS material based spectrally selective surface for photothermal and radiative cooling

被引：0
|
作者：
Chen N. [1 ]
Zhao B. [1 ]
Ao X. [1 ]
Hu M. [1 ]
Pei G. [1 ]
机构：
[1] Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2021年 / 42卷 / 12期
关键词：
Atmospheric window; Radiative cooling; Solar heat collection; Solar radiation; Spectral selectivity;
D O I：
10.19912/j.0254-0096.tynxb.2020-0074
中图分类号：
学科分类号：
摘要：
A spectrally selective surface is proposed based on polydimethylsiloxane (PDMS) material, which integrates photothermal and radiative cooling. Spectrum tests show that this surface has high emissivity (absorptivity) within the solar radiation band (i.e., 0.3~2.5 μm) and the atmospheric window band (i.e., 8~13 μm), with averaged emissivity values of 0.89 and 0.86, respectively. Besides, this surface has low emissivity (absorptivity) within the left and right mid-infrared band (i.e., 3~8 μm and 13~25 μm), with averaged emissivity values of 0.38 and 0.37, respectively. Overall, this surface shows obvious spectral selectivity. Furthermore, an outdoor experimental device is developed and preliminary tested to evaluate the surface's photothermal and nighttime radiative cooling performance. The results show that the surface temperature can reach 72.8℃ during the daytime, which is 69.6℃ above the surroundings, and it reaches -6.2℃ during the nighttime, which is 8.9℃ below the surroundings. © 2021, Solar Energy Periodical Office Co., Ltd. All right reserved.
引用
收藏
页码：80 / 85
页数：5
相关论文
共 9 条
  • [1] GE X S, SUN X L., Radiative cooling and the effect of spectrally selectivity of radiator on the cooling performance, Acta energiae solaris sinica, 3, 2, pp. 128-136, (1982)
  • [2] BLISS R W., Atmospheric radiation near the surface of the ground: A summary for engineers, Solar energy, 5, 3, pp. 103-120, (1961)
  • [3] GRANQVIST C, HJORTSBERG A., Radiative cooling to low temperatures: General considerations and application to selectively emitting SiO films, Journal of applied physics, 52, 6, pp. 4205-4220, (1981)
  • [4] GRANQVIST C, HJORTSBERG A, ERIKSSON T., Radiative cooling to low temperatures with selectivity IR-emitting surfaces, Thin solid films, 90, 2, pp. 187-190, (1982)
  • [5] RAMAN A P, ANOMA M A, FAN S H, Et al., Passive radiative cooling below ambient air temperature under direct sunlight, Nature, 515, 7528, pp. 540-545, (2014)
  • [6] ZHAI Y, MA Y G, SABRINA N D, Et al., Scalable-manufactured randomized glass-polymer hybrid metamaterial for daytime radiative cooling, Science, 355, 6329, pp. 1062-1066, (2017)
  • [7] MANDAL J, FU Y K, OVERVIG A C, Et al., Hierarchically porous polymer coatings for highly efficient passive daytime radiative cooling, Science, 362, 6412, pp. 315-319, (2018)
  • [8] CHEN J Y, CHANG W L, HUANG C K, Et al., Biomimetic nanostructured antireflection coating and its application on crystalline silicon solar cells, Optics express, 19, 15, pp. 14411-14419, (2011)
  • [9] WANG W Z, HUANG G Q, LU J., Study on structure optimization and refrigeration performance of night sky radiator, Acta energiae solaris sinica, 40, 7, pp. 1842-1849, (2019)
1