Abstract Sub-ambient radiative cooling has drawn abundant research interest, due to its great energy saving potential. However, the challenge of lacking suitable wind cover material seriously impedes its actual application. To address the challenge, the radiative cooling model with wind cover should be developed firstly. In this work, an accurate radiative cooling model considering the solar and mid-infrared transmissivity of wind cover is developed systematically. Subsequently, the radiative cooling experiments with the polyethylene film wind cover of different thickness are designed to validate the accuracy of the developed model. The experimental results demonstrate that wind cover has a significant impact on radiative cooling performance and the developed model has a high accuracy, with an average relative error of below 3%. Additionally, the developed model is used to investigate the radiative cooling performance in different areas. The modeling results indicate that radiative cooling has a great potential in arid areas. More significantly, feasible breakthrough route towards the rigid wind cover is discussed. The results indicate that the minimum target transmissivity of ultra-white glass and zinc selenide wind covers gradually improve with the increase of humidity. Our work provides a platform to address the challenge of lacking suitable wind cover and promotes the actual application of radiative cooling technology.

中文翻译：

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亚环境辐射冷却实际应用的理论和实验研究

摘要 亚环境辐射冷却因其巨大的节能潜力而引起了广泛的研究兴趣。然而，缺乏合适的风罩材料的挑战严重阻碍了其实际应用。为了应对这一挑战，应首先开发带风罩的辐射冷却模型。在这项工作中，系统地开发了一种考虑风罩的太阳和中红外透射率的精确辐射冷却模型。随后，设计了不同厚度聚乙烯薄膜风罩的辐射冷却实验，以验证所开发模型的准确性。实验结果表明，风罩对辐射冷却性能有显着影响，所建立的模型具有较高的精度，平均相对误差低于3%。此外，开发的模型用于研究不同区域的辐射冷却性能。建模结果表明辐射冷却在干旱地区具有很大的潜力。更重要的是，讨论了通往刚性风罩的可行突破路线。结果表明，随着湿度的增加，超白玻璃和硒化锌风罩的最小目标透过率逐渐提高。我们的工作为解决缺乏合适的风罩的挑战提供了一个平台，并促进了辐射冷却技术的实际应用。讨论了通往刚性防风罩的可行突破路线。结果表明，随着湿度的增加，超白玻璃和硒化锌风罩的最小目标透过率逐渐提高。我们的工作为解决缺乏合适的风罩的挑战提供了一个平台，并促进了辐射冷却技术的实际应用。讨论了通往刚性防风罩的可行突破路线。结果表明，随着湿度的增加，超白玻璃和硒化锌风罩的最小目标透过率逐渐提高。我们的工作为解决缺乏合适的风罩的挑战提供了一个平台，并促进了辐射冷却技术的实际应用。