High albedo daytime radiative cooling for enhanced bifacial PV performance
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...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2023-12-01
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| Series: | Nanophotonics |
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| Online Access: | https://doi.org/10.1515/nanoph-2023-0611 |
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| _version_ | 1850268531507068928 |
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| author | Kim Hannah Gao Yiwei Moran Ethan Howle Annyn McSherry Sean Cira Spencer Lenert Andrej |
| author_facet | Kim Hannah Gao Yiwei Moran Ethan Howle Annyn McSherry Sean Cira Spencer Lenert Andrej |
| author_sort | Kim Hannah |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-914549cecc7e463a8f2ce5ed26aeca34 |
| institution | OA Journals |
| issn | 2192-8614 |
| language | English |
| publishDate | 2023-12-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanophotonics |
| spelling | doaj-art-914549cecc7e463a8f2ce5ed26aeca342025-08-20T01:53:26ZengDe GruyterNanophotonics2192-86142023-12-0113562162710.1515/nanoph-2023-0611High albedo daytime radiative cooling for enhanced bifacial PV performanceKim Hannah0Gao Yiwei1Moran Ethan2Howle Annyn3McSherry Sean4Cira Spencer5Lenert Andrej6University of Michigan, Ann Arbor, MI, USAUniversity of Michigan, Ann Arbor, MI, USAUniversity of Michigan, Ann Arbor, MI, USAUniversity of Michigan, Ann Arbor, MI, USAUniversity of Michigan, Ann Arbor, MI, USAUniversity of Michigan, Ann Arbor, MI, USAUniversity of Michigan, Ann Arbor, MI, USAWe 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.https://doi.org/10.1515/nanoph-2023-0611radiative coolingground albedobifacialphotovoltaics |
| spellingShingle | Kim Hannah Gao Yiwei Moran Ethan Howle Annyn McSherry Sean Cira Spencer Lenert Andrej High albedo daytime radiative cooling for enhanced bifacial PV performance Nanophotonics radiative cooling ground albedo bifacial photovoltaics |
| title | High albedo daytime radiative cooling for enhanced bifacial PV performance |
| title_full | High albedo daytime radiative cooling for enhanced bifacial PV performance |
| title_fullStr | High albedo daytime radiative cooling for enhanced bifacial PV performance |
| title_full_unstemmed | High albedo daytime radiative cooling for enhanced bifacial PV performance |
| title_short | High albedo daytime radiative cooling for enhanced bifacial PV performance |
| title_sort | high albedo daytime radiative cooling for enhanced bifacial pv performance |
| topic | radiative cooling ground albedo bifacial photovoltaics |
| url | https://doi.org/10.1515/nanoph-2023-0611 |
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