气凝胶建筑玻璃透光隔热性能及影响因素

新型气凝胶玻璃具有良好的透光隔热性能,作为高性能建筑玻璃能有效降低建筑能耗。通过气凝胶颗粒粒径和填充厚度设计,制成8种不同结构的气凝胶填充玻璃;实验研究了气凝胶颗粒粒径与填充厚度对气凝胶玻璃透光和隔热性能的影响。结果表明:当气凝胶粒径从0.41mm增大到0.93mm时,玻璃透光率明显增大,而当气凝胶粒径继续增大时透光率变化不大;当气凝胶粒径从0.41mm增大到2.7mm时,气凝胶玻璃传热系数增大约15%;相对于普通玻璃,相同尺寸的普通玻璃传热系数最多可降低51.43%。采用玻璃隔热实验测试研究了气凝胶玻璃与普通中空玻璃的隔热温差,结果表明,气凝胶玻璃较普通玻璃隔热效果提高5.4~10.2℃。

Influencing factors of aerogel architectural glazing thermal and light properties

Aerogel glazing units (AGUs) with the high translucent insulation performance could reduce effectively energy saving in buildings.In this paper,eight kinds of AGUs were prepared and the effect on translucent and insulation performance of AGUs with different particle size and filling thicknesses was investigated.Experiments results indicate that visible light transmittance and solar radiation transmittance of AGUs increase obviously when particle size increases from 0.41mm to 0.93mm,while that change little when particle size continues to increase from 0.93mm.The heat transfer coefficient decreases about 15％ when the particle size reduces from 2.7mm to 0.41mm.The increace of the thickness of aerogel effectively decrease visible light transmittance,solar radiation transmittance and heat transfer coefficient,the heat transfer coefficient of AGUs can decrease 51.43％ compared with conventional double galzing at the same size.Finally,heat insulation experiments of testing insulation temperature difference of AGUs and conventional double glass were conducted,and the results reveal the temperature difference of AGUs before and after heating raise 5.4～10.2 ℃.Therefore,conclusion of this study give a clue to the application of this new heat insulating materials on energy saving in buildings.