环境单边屏蔽对辐射冷却性能的影响

IF 1.5 4区工程技术 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Photonics for Energy Pub Date : 2021-03-18 DOI:10.1117/1.JPE.11.022102

Kai Gao, You-wen Liu, Honglie Shen

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引用次数: 1

摘要

摘要辐射冷却作为一种无需任何能量输入的自发冷却现象，具有巨大的研究价值和广阔的应用前景。然而，热发射器周围的环境屏蔽对热发射器的辐射冷却功率有负面影响。采用聚四氟乙烯铝作为辐射冷却热发射器，测量了不同单边屏蔽角下的辐射冷却性能。在开放和无障碍的环境中实现了7.4°C的温差，而在90度的单侧屏蔽角下实现了2.8°C的温度差。此外，使用节能模型，我们从理论上计算了不同屏蔽条件下热发射器的辐射冷却功率和温差，与实验结果吻合较好。

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Effects of the environmental unilateral shield on radiative cooling performance

Abstract. 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.

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来源期刊

Journal of Photonics for Energy MATERIALS SCIENCE, MULTIDISCIPLINARY-OPTICS

CiteScore

3.20

自引率

5.90%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Photonics for Energy publishes peer-reviewed papers covering fundamental and applied research areas focused on the applications of photonics for renewable energy harvesting, conversion, storage, distribution, monitoring, consumption, and efficient usage.