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Annual Energy-Saving Smart Windows with Actively Controllable Passive Radiative Cooling and Multimode Heating Regulation
Advanced Materials ( IF 27.4 ) Pub Date : 2024-04-19 , DOI: 10.1002/adma.202401869 Yuan Deng 1 , Yihai Yang 2 , Yuanhang Xiao 1 , Xingping Zeng 3 , He-Lou Xie 1 , Ruochen Lan 4 , Lanying Zhang 2 , Huai Yang 2
Advanced Materials ( IF 27.4 ) Pub Date : 2024-04-19 , DOI: 10.1002/adma.202401869 Yuan Deng 1 , Yihai Yang 2 , Yuanhang Xiao 1 , Xingping Zeng 3 , He-Lou Xie 1 , Ruochen Lan 4 , Lanying Zhang 2 , Huai Yang 2
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Smart windows with radiative heat management capability using the sun and outer space as zero-energy thermodynamic resources have gained prominence, demonstrating a minimum carbon footprint. However, realizing on-demand thermal management throughout all seasons while reducing fossil energy consumption remains a formidable challenge. Herein, an energy-efficient smart window that enables actively tunable passive radiative cooling (PRC) and multimode heating regulation is demonstrated by integrating the emission-enhanced polymer-dispersed liquid crystal (SiO2@PRC PDLC) film and a low-emission layer deposited with carbon nanotubes. Specifically, this device can achieve a temperature close to the chamber interior ambient under solar irradiance of 700 W m−2, as well as a temperature drop of 2.3 °C at sunlight of 500 W m−2, whose multistage PRC efficiency can be rapidly adjusted by a moderate voltage. Meanwhile, synchronous cooperation of passive radiative heating (PRH), solar heating (SH), and electric heating (EH) endows this smart window with the capability to handle complicated heating situations during cold weather. Energy simulation reveals the substantial superiority of this device in energy savings compared with single-layer SiO2@PRC PDLC, normal glass, and commercial low-E glass when applied in different climate zones. This work provides a feasible pathway for year-round thermal management, presenting a huge potential in energy-saving applications.
中文翻译：
具有主动可控被动辐射冷却和多模式加热调节功能的年度节能智能窗
具有辐射热管理能力、利用太阳和外层空间作为零能量热力学资源的智能窗户已经受到关注，展示了最小的碳足迹。然而，在减少化石能源消耗的同时实现全季节按需热管理仍然是一项艰巨的挑战。本文通过集成发射增强型聚合物分散液晶 (SiO 2 @PRC PDLC) 薄膜和沉积的低发射层，展示了一种节能智能窗，可实现主动可调被动辐射冷却 (PRC) 和多模式加热调节与碳纳米管。具体而言，该装置在700 W m -2太阳辐照度下可实现接近室内环境的温度，在500 W m -2太阳辐照度下可实现2.3℃的温降，其多级PRC效率可快速提升。通过适度的电压调节。同时，被动辐射供暖（PRH）、太阳能供暖（SH）和电供暖（EH）的同步配合，使这款智能窗能够应对寒冷天气下复杂的供暖情况。能量模拟表明，该装置在不同气候区应用时，与单层SiO 2 @PRC PDLC、普通玻璃和商用Low-E玻璃相比，在节能方面具有显着的优势。这项工作为全年热管理提供了一条可行的途径，在节能应用中展现出巨大的潜力。
更新日期：2024-04-19
中文翻译：
具有主动可控被动辐射冷却和多模式加热调节功能的年度节能智能窗
具有辐射热管理能力、利用太阳和外层空间作为零能量热力学资源的智能窗户已经受到关注，展示了最小的碳足迹。然而，在减少化石能源消耗的同时实现全季节按需热管理仍然是一项艰巨的挑战。本文通过集成发射增强型聚合物分散液晶 (SiO 2 @PRC PDLC) 薄膜和沉积的低发射层，展示了一种节能智能窗，可实现主动可调被动辐射冷却 (PRC) 和多模式加热调节与碳纳米管。具体而言，该装置在700 W m -2太阳辐照度下可实现接近室内环境的温度，在500 W m -2太阳辐照度下可实现2.3℃的温降，其多级PRC效率可快速提升。通过适度的电压调节。同时，被动辐射供暖（PRH）、太阳能供暖（SH）和电供暖（EH）的同步配合，使这款智能窗能够应对寒冷天气下复杂的供暖情况。能量模拟表明，该装置在不同气候区应用时，与单层SiO 2 @PRC PDLC、普通玻璃和商用Low-E玻璃相比，在节能方面具有显着的优势。这项工作为全年热管理提供了一条可行的途径，在节能应用中展现出巨大的潜力。
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