Cai Yuanzhu, Zhang Zihan, Yang Zhuo, Fang Zhi, Chen Shuping, Zhang Xiaolong, Li Wen, Zhang Yinghua, Zhang Hongqiang, Sun Zhipeng, Zhang Yangang, Li Yanwen, Liu Lianhua, Zhang Weidong, Xue Xiao
China Southwest Architectural Design and Research Institute Co., Ltd., Chengdu, 610042, China.
Department of Information and Art Design, Henan Forestry Vocational College, Luoyang, 471002, China.
Heliyon. 2023 Mar 27;9(4):e14599. doi: 10.1016/j.heliyon.2023.e14599. eCollection 2023 Apr.
The thermal performance of a novel exterior coating material for commonly used grain and food-grain oil structures was investigated. Grain structures included a concrete squat silo and a concrete warehouse while the edible oil structure was a concrete sided tank. The exterior coating provided excellent moisture runoff and solar reflectance properties and is best described as a superamphiphobic self-cleaning passive subambient daytime radiative cooling (SSC-PSDRC) coating. The coating exhibited a remarkable subambient daytime cooling effect in various structures in different climatic regions. Compared with the roof surface temperatures of a cool white-coated concrete grain silo and a gray carbon iron-based edible oil storage tank, those of the PSDRC coated top surfaces could be reduced by 37 °C and 33 °C, respectively. The roof surface temperature of a warehouse painted with a cool-white coating-with a solar reflectance of 0.9 and an emissivity of 0.85-and that of a warehouse with the roof installed with aluminised polymer waterproof membranes were 19 °C and 18 °C higher than that of the PSDRC warehouse, respectively. Consequently, the interior temperature of the wheat pile in the PSDRC grain silo was 10 °C lower than that in the control squat silo. With the inner loop flow temperature control system operating, the interior air temperatures of the PSDRC west-facing separate space were 6 °C and 3 °C higher than those of the cool-white coated and control west-facing separate spaces, respectively. Even after the application of PSDRC coating for only a few days, the interior air temperature of the PSDRC oil storage tank was reduced by 38 °C, and the interior temperature of the oil storage tank was reduced by 4 °C. Furthermore, in practical applications, the coating showed impressive superamphiphobic self-cleaning capabilities and super aging resistance. The wide applications of the coating would have far-reaching, global implications for maintaining grain and edible oil products, particularly in the sub-tropical climates.
研究了一种用于常用谷物和粮食油罐结构的新型外墙涂料的热性能。谷物结构包括一个混凝土矮筒仓和一个混凝土仓库，而食用油结构是一个混凝土侧壁罐。外墙涂料具有出色的排水和太阳能反射性能，最好被描述为一种超双疏自清洁被动亚环境日间辐射冷却（SSC - PSDRC）涂料。该涂料在不同气候区域的各种结构中均表现出显著的亚环境日间冷却效果。与涂有冷白色涂料的混凝土谷物筒仓和灰色碳铁基食用油储存罐的屋顶表面温度相比，PSDRC涂层顶面的温度分别可降低37°C和33°C。涂有太阳能反射率为0.9、发射率为0.85的冷白色涂料的仓库屋顶表面温度以及安装了镀铝聚合物防水膜屋顶的仓库屋顶表面温度，分别比PSDRC仓库的屋顶表面温度高19°C和18°C。因此，PSDRC谷物筒仓中小麦堆的内部温度比对照矮筒仓低10°C。在内环流温度控制系统运行的情况下，PSDRC朝西独立空间的内部空气温度分别比涂有冷白色涂料的朝西独立空间和对照朝西独立空间高6°C和3°C。即使在仅应用PSDRC涂层几天之后，PSDRC储油罐的内部空气温度降低了38°C，储油罐内部温度降低了4°C。此外，在实际应用中，该涂料表现出令人印象深刻的超双疏自清洁能力和超强耐老化性。该涂料的广泛应用对于谷物和食用油产品的保存具有深远的全球意义，特别是在亚热带气候地区。
