2024-03-13 ペンシルベニア州立大学(PennState)
＜関連情報＞
- https://www.psu.edu/news/engineering/story/sun-and-space-harnessing-cold-universe-and-solar-power-renewable-energy/
- https://www.cell.com/cell-reports-physical-science/fulltext/S2666-3864%2824%2900112-7
日中の放射冷却と太陽光発電を同じエリアで同時に実現 Simultaneous subambient daytime radiative cooling and photovoltaic power generation from the same area
Pramit Ghosh,Xinsheng Wei,Hanze Liu,Zhenong Zhang,Linxiao Zhu
Cell Reports Physical Science Published:March 13, 2024
DOI:https://doi.org/10.1016/j.xcrp.2024.101876
Highlights
•Simultaneous radiative cooling and photovoltaic power generation from the same area
•63.8 W/m2 cooling power and 159.9 W/m2 photovoltaic power output under peak sunlight
•The dual-harvesting system surpasses a bare solar cell in electricity savings by 30%
Summary
Daytime radiative cooling to below ambient air temperature relies on radiating heat while reflecting most sunlight. Thus, subambient daytime radiative cooling has been largely incompatible with solar energy harvesting. Despite the great theoretical potential of coharvesting the cold universe and the sun as renewable resources, subambient daytime radiative cooling and significant solar power generation have not been achieved simultaneously. Here, we introduce and demonstrate simultaneous subambient daytime radiative cooling and photovoltaic power generation from the same area. Outdoor experiments show that the radiative cooler reaches 5.1°C below the ambient temperature under ∼1,000 W/m2 sunlight, and the photovoltaic cell produces 159.9 W/m2 simultaneously and from the same area. The radiative cooling power at ambient temperature is measured to be 63.8 W/m2 under peak sunlight and 87.0 W/m2 at night. The results highlight the great potential of simultaneous radiative cooling and sunlight harvesting for renewable energy.
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