The potential of radiative cooling enhanced photovoltaic systems in China

IF 13 Q1 ENERGY & FUELS

Advances in Applied Energy Pub Date : 2024-07-26 DOI:10.1016/j.adapen.2024.100184

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Abstract

Soaring solar cell temperature hindered photovoltaic (PV) efficiency, but a novel radiative cooling (RC) cover developed in this study offered a cost-effective solution. Using a randomly particle-doping structure, the radiative cooling cover achieved a high “sky window” emissivity of 95.3% while maintaining a high solar transmittance of 94.8%. The RC-PV system reached a peak power output of 147.6 W/m $^{2}$ . A field study to explore its potential in various provinces in China revealed significant efficiency improvements, with yearly electricity outputs surpassing those of ordinary PV systems by a relative improvement of 2.78%–3.72%. The largest increases were observed under clear skies and in dry, cool climates, highlighting the potential of RC-PV systems under real weather and environmental conditions. This work provided the theoretical foundation for designing scalable radiative cooling films for PV systems, unlocking the full potential of solar energy.

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辐射冷却增强型光伏系统在中国的潜力

太阳能电池温度的飙升阻碍了光伏（PV）效率的提高，但本研究开发的新型辐射冷却（RC）罩提供了一种经济有效的解决方案。辐射冷却罩采用随机颗粒掺杂结构，实现了 95.3% 的高 "天窗 "发射率，同时保持了 94.8% 的高太阳能透过率。RC-PV 系统的峰值功率输出为 147.6 W/m2。在中国各省进行的一项探索其潜力的实地研究表明，该系统的效率显著提高，年发电量超过了普通光伏系统，相对提高了 2.78% 至 3.72%。在晴朗的天气和干燥凉爽的气候条件下，效率提高幅度最大，凸显了 RC-PV 系统在实际天气和环境条件下的潜力。这项工作为设计可扩展的光伏系统辐射冷却薄膜提供了理论基础，从而释放了太阳能的全部潜力。

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