High albedo daytime radiative cooling for enhanced bifacial PV performance
High albedo daytime radiative cooling for enhanced bifacial PV performance
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DOI：
10.1515/nanoph-2023-0611
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发表时间：
2023-12
期刊：
影响因子：
7.5
通讯作者：
Hannah Kim;Yiwei Gao;Ethan Moran;Annyn Howle;Sean McSherry;Spencer Cira;A. Lenert
中科院分区：
文献类型：
--
作者：
Hannah Kim;Yiwei Gao;Ethan Moran;Annyn Howle;Sean McSherry;Spencer Cira;A. Lenert
摘要我们提出了一种辐射冷却材料，能够提高热效率，同时降低地面温度下的双面太阳能电池板。将一层聚丙烯腈纳米纤维或纳米PAN静电纺丝到聚合物涂覆的银镜上，产生99%的总太阳反射率，0.96的反射率和0.80的热发射率。通过由纳米PAN的分级形态引起的波长选择性散射实现高散射度和高发射度的组合，纳米PAN包括细纤维和珠状结构。在室外测试中，该材料的辐射冷却功率比最先进的控制器高出200 W/m2，并且与沙子相比，将商业硅电池产生的光电流提高了6.4 mA/cm 2。这些实验验证了高热导率辐射冷却反射器的基本特性，具有很好的潜在应用前景，在热和光管理领域的双面面板。
Abstract We present a radiative cooling material capable of enhancing albedo while reducing ground surface temperatures beneath fielded bifacial solar panels. Electrospinning a layer of polyacrylonitrile nanofibers, or nanoPAN, onto a polymer-coated silver mirror yields a total solar reflectance of 99 %, an albedo of 0.96, and a thermal emittance of 0.80. The combination of high albedo and high emittance is enabled by wavelength-selective scattering induced by the hierarchical morphology of nanoPAN, which includes both thin fibers and bead-like structures. During outdoor testing, the material outperforms the radiative cooling power of a state-of-the-art control by ∼20 W/m2 and boosts the photocurrent produced by a commercial silicon cell by up to 6.4 mA/cm2 compared to sand. These experiments validate essential characteristics of a high-albedo radiative-cooling reflector with promising potential applications in thermal and light management of fielded bifacial panels.