一种基于PDMS材料的太阳能集热-辐射制冷光谱选择性表面的研究  

STUDY OF A PDMS MATERIAL BASED SPECTRALLY SELECTIVE SURFACE FOR PHOTOTHERMAL AND RADIATIVE COOLING

作　　者：陈诺 赵斌 敖显泽 胡名科 裴刚[1] Chen Nuo;Zhao Bin;Ao Xianze;Hu Mingke;Pei Gang(Department of Thermal Science and Energy Engineering,University of Science and Technology of China,Hefei 230027,China)

机构地区：[1]中国科学技术大学热科学和能源工程系,合肥230027

出　　处：《太阳能学报》2021年第12期80-85,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51776193,51761145109)。

摘　　要：提出并试制一种基于PDMS材料的太阳能集热-辐射制冷耦合的光谱选择性表面。光谱测试发现该表面在太阳辐射波段(0.3~2.5μm)和"大气窗口"波段(8~13μm)具有高发射(吸收)率,分别为0.89和0.86;在左中红外波段(3~8μm)和右中红外波段(13~25μm)具有低发射(吸收)率,分别为0.38和0.37,呈现出鲜明的光谱选择特性。此外,搭建户外实验装置并对该表面的白天集热和夜间制冷性能进行初步测试。结果表明该表面日间的集热温度为72.8℃,比环境温度高69.6℃;夜间的制冷温度为-6.2℃,比环境温度低8.9℃。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.

关 键 词：太阳能集热 辐射制冷 太阳辐射 大气窗口 光谱选择性 

分 类 号：TK514[动力工程及工程热物理—热能工程]