摘要
反射隔热复合涂料兼具热反射和热阻隔作用,目前还缺少对气凝胶新型复合涂料的隔热与节能性能的量化数据。实验测试了气凝胶反射隔热复合涂料的太阳光反射率、导热系数和隔热温差,并模拟分析了其应用于夏热冬暖地区建筑外墙的节能效果。结果表明,气凝胶反射隔热复合涂料太阳反射率为89%、近红外反射率为91%、导热系数为0.059 W/(m·K),隔热温差可达33.8℃,隔热性能相比于传统涂料均有较大提升;应用于夏热冬暖地区可降低建筑全年制冷能耗28%~34%,在以制冷需求为主的气候区具有较大的节能降碳潜力。结果可为气凝胶反射隔热复合涂料在建筑领域的节能降碳应用提供数据参考。
Reflective thermal insulation composite coatings have both heat reflection and thermal barrier effects, and there is a lack of quantitative data on the thermal insulation and energy saving performance of the new aerogel composite coatings. The solar reflectance, thermal conductivity and thermal insulation temperature difference of aerogel heat-reflective and insulating composite coating were tested, and their energy-saving effects were simulated and analyzed when used on building facades in hot summer and warm winter regions. The results show that the solar reflectivity of aerogel heat-reflective and insulating composite coating is 89%, the near-infrared reflectivity rate is 91%, the thermal conductivity is 0.059 W/(m·K), and the thermal insulation temperature difference can reach 33.8 ℃, which shows that its thermal insulation performance is greatly improved compared with traditional coatings. The application of aerogel heat-reflective and insulating composite coating in hot summer and warm winter regions can reduce the annual cooling energy consumption of buildings by 28%~34%, which has a great potential for energy saving and carbon reduction in climate zones where cooling demand is the main concern. The results of this study can provide data reference for the application of aerogel heat-reflective and insulating composite coating in the field of energy saving and carbon reduction in buildings.
作者
张广鹏
丁玉杰
吴会军
黄华锟
ZHANG Guang-peng;DING Yu-jie;WU Hui-jun;HUANG Hua-kun(School of Civil Engineering,Institute of Building Energy Efficiency,Guangzhou University,Guangzhou 510006,China;Guangdong Provincial Key Laboratory of Building Energy Efficiency and Application Technologies,Guangzhou 510006,China;School of Computer Science and Cyber Engineering,Guangzhou University,Guangzhou 510006,China)
出处
《建筑节能（中英文）》
CAS
2022年第9期34-38,共5页
Building Energy Efficiency
基金
国家自然科学基金资助项目:基于辐射面和空气接触面分离的建筑辐射供冷解耦机理与实验研究(52078144)。
关键词
反射隔热涂料
气凝胶
建筑热工
建筑节能
reflective thermal insulation coating
aerogel
building thermal engineering
building energy saving
