气凝胶绝热板热工性能研究  

Thermal Performance Study of Aerogel Insulating Panels

作　　者：杨建明[1] 郭思彤[1] 徐新华[2] 孙智 吴会军[1] YANG Jianming;GUO Sitong;XU Xinhua;SUN Zhi;WU Huijun(College of Civil Engineering, Guangzhou University, Guangzhou 510006, China;Department of Building Environment and Service Engineering, Huazhong University of Science and Technology, Wuhan 430074, China)

机构地区：[1]广州大学土木工程学院,广东广州510006 [2]华中科技大学建筑环境与设备工程系,湖北武汉430074

出　　处：《建筑材料学报》2019年第5期786-791,共6页Journal of Building Materials

基　　金：广州市教育系统创新团队项目（1201610010）;广东省科技计划项目（2017A050506058）;广东省教育厅重大科研项目（2016KZDXM035)

摘　　要：采用溶胶-凝胶法和常压干燥技术制备了气凝胶绝热板,将其与2种传统保温隔热材料(聚苯乙烯泡沫和玻璃纤维毡)进行对比试验研究;针对保温盒试验记录的温度分布情况,建立了热阻-热容简化传热模型,预测了在周期性室外干扰条件下3种保温盒的温度变化、温度波延迟时间和衰减倍数.结果表明:相较于传统保温隔热材料,气凝胶绝热板温度波延迟时间可增大1倍,衰减倍数增大约40%,表明气凝胶绝热板的热工性能明显优于传统保温隔热材料.Aerogel insulating panels were prepared by sol-gel method and normal pressure drying technology. Traditional insulation materials such as expanded polystyrene foam and inorganic glass fiber mat were used as comparisons. Thermocouples were used to test the temperature distribution of insulating boxes. A thermal resistance-heat capacity simplified heat transfer model was established to predict the temperature variation of the insulating boxes under periodic outdoor interference, as well as time lag and damping factor of the temperature wave. The results indicate that compared with traditional insulation materials, the time lag of the box of aerogel insulating panel can be doubled and the damping factor can be increased about 40%. Obviously, the aerogel insulating panel is significantly superior to traditional insulating materials in transient thermal performance.

关 键 词：气凝胶 隔热 建筑材料 节能 

分 类 号：TU551[建筑科学—建筑技术科学]