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High albedo daytime radiative cooling for enhanced bifacial PV performance.
- Source :
- Nanophotonics (21928606); Mar2024, Vol. 13 Issue 5, p621-627, 7p
- Publication Year :
- 2024
-
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/m<superscript>2</superscript> and boosts the photocurrent produced by a commercial silicon cell by up to 6.4 mA/cm<superscript>2</superscript> 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 21928606
- Volume :
- 13
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Nanophotonics (21928606)
- Publication Type :
- Academic Journal
- Accession number :
- 175992750
- Full Text :
- https://doi.org/10.1515/nanoph-2023-0611