文献详情
Generic method for creating waterborne coatings with sub-ambient daytime cooling-Part II: Cooling effect under real working conditions and key physical properties
文献类型：期刊
通讯作者：Xu, LJ (reprint author), Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China.; Zhang, WD (reprint author), China State Construct Engn Co Ltd, Tech Ctr, Beijing 101300, Peoples R China.
期刊名称：SOLAR ENERGY MATERIALS AND SOLAR CELLS影响因子和分区
年：2020
卷：204
ISSN：0927-0248
关键词：Sub-ambient daytime radiative cooling; Weather resistance; Corrosion resistance; Self-cleaning
所属部门：化学系
摘要：Current sub-ambient daytime radiative cooling (SDRC) designs are generally evaluated in a well-insulated apparatus to suppress heat convection and conduction with the surrounding environment. In a companion study, we experimentally demonstrated that serial waterborne coatings, which combined particle scattering, sunlight-excited fluorescence, and mid-infrared broadband radiation, exhibited pronounced SDRC effects on various substrates installed on a well-designed rooftop setup under different cl ...More
Current sub-ambient daytime radiative cooling (SDRC) designs are generally evaluated in a well-insulated apparatus to suppress heat convection and conduction with the surrounding environment. In a companion study, we experimentally demonstrated that serial waterborne coatings, which combined particle scattering, sunlight-excited fluorescence, and mid-infrared broadband radiation, exhibited pronounced SDRC effects on various substrates installed on a well-designed rooftop setup under different climatic conditions. In this study, we experimentally show that the coating with yellow-green fluorescence (termed as the FR coating) can achieve meaningful SDRC under real working conditions. When applied to a concrete scale-model building, the FR coating showed a significant SDRC effect compared with other substrates installed on the rooftop cooling device and an assembled corrugated steel house. The average decrease in sub-ambient temperature under direct sunlight was 10.1 +/- 1.4 degrees C with a maximum value of 12.4 degrees C under a peak solar intensity of 999 W/m(2). Moreover, during the coldest day in winter, the maximum sub-ambient temperature reduction during the midday hours was 5.3 degrees C. The maximum difference between the lowest temperatures of the coated and uncoated scale-model buildings' room interiors was 1.5-1.6 degrees C. Therefore, excessive heating energy consumption in the winter might be completely compensated for or exceeded by the cooling energy savings in the summer in areas that require both heating and cooling depending on the season. Additionally, the coating possesses excellent weather and salt spray resistance, self-cleaning capabilities, and excellent visible appearance, which are essential for practical applications. ...Hide

DOI：10.1016/j.solmat.2019.110220
百度学术：Generic method for creating waterborne coatings with sub-ambient daytime cooling-Part II: Cooling effect under real working conditions and key physical properties
语言：外文
人气指数：2
浏览次数：2
基金：National Natural Science Foundation of ChinaNational Natural Science Foundation of China [51873200, 61535004]; Harbin Zhongke Materials Engineering Co., Ltd. [BL-2017B-061]
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