Abstract As an entirely passive cooling strategy, radiative cooling (RC) is an appealing approach to draw heat from the terrestrial surface to outer space. RC can be easily and effectively realized during the nighttime with the absence of sunlight, which coincidently mismatches the operation time of solar collectors. Therefore, it is of possibility and significance to unite the RC device and solar collector to extend the working period and function. In the present work, a novel combined photo-thermal and radiative cooling (PT-RC) module was proposed, experimentally and numerically investigated. By applying separated heating and cooling components, the PT-RC module demonstrated a daytime stagnation temperature of 159.8 °C and a nighttime one of 0.6 °C through a consecutive 24 h experimental duration. By contrast, a conventional photo-thermal (PT) module as a reference showed the highest panel temperature of 153.5 °C during the daytime and the lowest panel temperature of 7.9 °C in the nighttime. Further modeling was conducted to evaluate the thermal performance of the proposed PT-RC module compared with stand-alone PT module and spectrally coupled PT-RC module under different working conditions. This dual-function collector may contribute a potential solution for sustainable energy technology in Zero Energy Building applications.

中文翻译：

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双盖混合光热辐射天冷模块可行性研究

摘要 作为一种完全被动的冷却策略，辐射冷却 (RC) 是一种将热量从地球表面吸收到外层空间的有吸引力的方法。RC 可以在没有阳光的夜间轻松有效地实现，这恰好与太阳能集热器的运行时间不匹配。因此，将RC装置和太阳能集热器结合起来以延长工作周期和功能具有可能和意义。在目前的工作中，提出了一种新颖的组合光热辐射冷却 (PT-RC) 模块，并进行了实验和数值研究。通过应用独立的加热和冷却组件，PT-RC 模块在连续 24 小时的实验持续时间内表现出 159.8 °C 的白天停滞温度和 0.6 °C 的夜间停滞温度。相比之下，作为参考的传统光热 (PT) 模块显示，白天最高面板温度为 153.5 °C，夜间最低面板温度为 7.9 °C。进行了进一步的建模以评估所提出的 PT-RC 模块与独立 PT 模块和光谱耦合 PT-RC 模块在不同工作条件下的热性能。这种双功能集热器可能为零能耗建筑应用中的可持续能源技术提供潜在的解决方案。进行了进一步的建模以评估所提出的 PT-RC 模块与独立 PT 模块和光谱耦合 PT-RC 模块在不同工作条件下的热性能。这种双功能集热器可能为零能耗建筑应用中的可持续能源技术提供潜在的解决方案。进行了进一步的建模以评估所提出的 PT-RC 模块与独立 PT 模块和光谱耦合 PT-RC 模块在不同工作条件下的热性能。这种双功能集热器可能为零能耗建筑应用中的可持续能源技术提供潜在的解决方案。