聚光光伏的辐射冷却(会议报告)

P. Bermel
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引用次数: 0

摘要

辐射冷却是一种独特的紧凑的被动冷却机制。重要的应用可以在能源生产中找到,特别是聚光光伏(CPV)和热光伏(TPV)。两者都依赖于低带隙光伏电池,在高温下工作时,性能和寿命都会显著降低。这个问题对广泛采用造成了重大障碍。为了解决这一挑战,我们首次展示了在集中阳光下低带隙光伏电池的增强辐射冷却。采用复合材料堆作为辐射冷却器。增强的辐射冷却使工作温度降低了10摄氏度,相当于开路电压相对增加了5.7%,在13个太阳下的寿命估计增加了40%。使用模型,我们还估计相同的设置可以在35个太阳下实现34%的开路电压改进,这可以将高激活能失效模式的能源成本降低高达33%。本文演示的辐射冷却增强是一种简单直接的方法,可以推广到其他光电系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Radiative cooling for concentrating photovoltaics (Conference Presentation)
Radiative cooling is a uniquely compact and passive cooling mechanism. Significant applications can be found in energy generation, particularly concentrating photovoltaics (CPV) and thermophotovoltaics (TPV). Both rely on low-bandgap PV cells that experience significant reductions in performance and lifetime when operating at elevated temperatures. This issue creates a significant barrier to widespread adoption. To address this challenge, we demonstrate enhanced radiative cooling for low-bandgap PV cells under concentrated sunlight for the first time. A composite material stack is used as the radiative cooler. Enhanced radiative cooling reduces operating temperatures by 10 degrees C, translating into a relative increase of 5.7% in open-circuit voltage and an estimated increase of 40% in lifetime at 13 suns. Using a model, we also estimate the same setup could achieve an improvement of 34% in open-circuit voltage for 35 suns, which could reduce levelized costs of energy up to 33% for high activation energy failure modes. The radiative cooling enhancement demonstrated here is a simple and straightforward approach, which can be generalized to other optoelectronic systems.
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