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High albedo daytime radiative cooling for enhanced bifacial PV performance
- Source :
- Nanophotonics, Vol 13, Iss 5, Pp 621-627 (2023)
- Publication Year :
- 2023
- Publisher :
- De Gruyter, 2023.
-
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.
- Subjects :
- radiative cooling
ground albedo
bifacial
photovoltaics
Physics
QC1-999
Subjects
Details
- Language :
- English
- ISSN :
- 21928614
- Volume :
- 13
- Issue :
- 5
- Database :
- Directory of Open Access Journals
- Journal :
- Nanophotonics
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.914549cecc7e463a8f2ce5ed26aeca34
- Document Type :
- article
- Full Text :
- https://doi.org/10.1515/nanoph-2023-0611