Radiative cooling as a spontaneous cooling phenomenon without any energy input has great research value and broad application prospects. However, environmental shields around the thermal emitter have a negative impact on the radiative cooling power of thermal emitters. A PTFE-Al was used as the radiative cooling thermal emitter, and the radiative cooling performances with different unilateral shielding angle were measured. The temperature difference of 7.4°C was achieved in an open and unobstructed environment, while the temperature difference of 2.8°C at the unilateral shielding angle of 90 deg. Furthermore, using the energy conservation model, we theoretically calculated the radiative cooling powers and the temperature differences of the thermal emitter under different shielding conditions, which were in good agreement with the experimental results.

中文翻译：

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环境单边屏蔽对辐射散热性能的影响

辐射冷却作为一种自发的冷却现象，无任何能量输入，具有很大的研究价值和广阔的应用前景。但是，热辐射器周围的环境屏蔽会对热辐射器的辐射冷却功率产生负面影响。使用PTFE-Al作为辐射冷却热辐射源，并测量了不同单边屏蔽角的辐射冷却性能。在开放无障碍的环境中，温度差为7.4°C，而在单边屏蔽角为90度时，温度差为2.8°C。此外，我们使用能量守恒模型从理论上计算了在不同屏蔽条件下散热器的辐射冷却功率和温差，