The increasing energy consumption in buildings exacerbates the worldwide energy shortage and environmental pollution problems. To reduce the energy consumption, emerging thermal management technologies such as radiative cooling, thermal insulation, and phase change thermal regulation have been used in building envelopes. Most recently, aerogel-based tunable daytime radiative supercoolers have been proved to be an ideal candidate for energy consumption savings. Herein, a phase change material (PCM) enhanced thermostat for energy-efficient buildings is designed to go beyond the limitation of insulating radiative coolers. Compared to cutting-edge aerogel coolers, the proposed phase change thermostat featuring latent heat storage and release is capable of dynamically adjusting its thermal regulation performance along with the change of the environmental temperature, further absorbing the heat during the daylight for cooling and releasing the stored heat at night to suppress overcooling. The phase change thermostat with low thermal conductivity, high solar reflectance, considerable infrared emissivity, and high energy storage density shows great potential for all-day temperature-adaptive thermal management in energy-saving buildings.

中文翻译：

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相变恒温器可实现全天温度自适应热调节


建筑物能源消耗的不断增加加剧了全球能源短缺和环境污染问题。为了降低能耗，辐射冷却、隔热、相变热调节等新兴热管理技术已被应用于建筑围护结构。最近，基于气凝胶的可调日间辐射过冷器已被证明是节省能源消耗的理想选择。本文中，用于节能建筑的相变材料（PCM）增强型恒温器的设计超越了绝缘辐射冷却器的限制。与最先进的气凝胶冷却器相比，所提出的具有潜热储存和释放功能的相变恒温器能够随着环境温度的变化动态调整其热调节性能，进一步吸收白天的热量进行冷却并释放储存的热量。夜间加热以抑制过冷。相变恒温器具有低导热系数、高太阳反射率、可观的红外发射率和高储能密度，在节能建筑中全天温度自适应热管理方面显示出巨大潜力。