SiO2气凝胶提高岩棉保温性能的试验研究  

Experimental Study on Improving the Thermal Insulation Performance of Rock Wool by Silica Aerogel

作　　者：吴志菊 闫秋会[1] 罗杰任 WU Zhiju;YAN Qiuhui;LUO Jieren(School of Building Services Science and Engineering, Xi’an University of Architecture and Technology;Institute of Urban Planning and Municipal Engineering, Xi’an Polytechnic University)

机构地区：[1]西安建筑科技大学建筑设备科学与工程学院 [2]西安工程大学城市规划与市政工程学院

出　　处：《建筑热能通风空调》2019年第5期13-16,共4页Building Energy & Environment

基　　金：陕西省重点研发计划项目(2018SF-355);碑林区科技计划项目(GX1804);动力工程多相流国家重点实验室开放基金

摘　　要：以无水乙醇为溶剂,SiO2气凝胶为溶质,制取SiO2气凝胶改性溶液。采用浸润及常压干燥制备岩棉/SiO2气凝胶复合板,研究SiO2气凝胶的质量分数和浸润时间对岩棉/SiO2气凝胶复合板的短期吸水量,导热系数以及抗压强度的影响。并选取某办公楼建筑为研究对象,利用建筑能耗模拟软件DeST,研究岩棉/SiO2气凝胶复合板在以西安为代表的寒冷地区的建筑能耗。结果表明:随着SiO2气凝胶的质量分数的增加,岩棉/SiO2气凝胶复合板的短期吸水量逐渐变小,导热系数逐渐减小,其抗压强度略有提高。与未进行保温措施相比,厚度为30 mm的岩棉/SiO2气凝胶复合板能耗节能率大于25%。Silica aerogel modified solution was prepared with anhydrous ethanol as solvent and silica aerogel as solute. The effects of silica aerogel mass fraction and infiltration time on shortterm water absorption, thermal conductivity and compressive properties of rock wool/SiO2 aerogel composite board by using the infiltration and atmospheric drying were studied. Taking an office building as the research object, the building energy consumption of rock wool/SiO 2 aerogel composite board in cold area was studied by using the building energy simulation software DeST. The results showed that with the increase of the mass fraction of silica aerogel, the shortterm water absorption and the thermal conductivity of rock wool/SiO 2 aerogel composite board gradually decreased, and its compressive strength slightly increased. Compared with the nonthermal insulation measures, the energy saving rate of rock wool/SiO2 aerogel composite board with a thickness of 30mm was greater than 25%.

关 键 词：SIO2气凝胶 岩棉/SiO2气凝胶复合板 导热系数 建筑能耗 

分 类 号：TU551[建筑科学—建筑技术科学]