%0 Journal Article %T 复合相变蓄热材料太阳能通风井性能<br>Performance of solar ventilation shaft based on composite phase change thermal storage materials %A 丁云飞 %A 王元明 %A 吴会军 %J 土木建筑与环境工程 %D 2018 %R 10.11835/j.issn.1674-4764.2018.04.002 %X 针对太阳能通风井道蓄热单元的技术需求,制备了复合相变蓄热材料,并将其应用于通风井壁,建立了基于复合相变蓄热材料的太阳能通风井测试系统,并测试了其运行性能。结果表明:添加5%碳纳米管制备的复合相变材料,其导热系数为0.65 W/m·K,是添加前的2.03倍,相变潜热为107 J/g,是添加前的0.718倍。应用上述材料的太阳能通风井测试系统在10:00-21:00时段通风量为55.0~103.9 m3/h,其中在17:00风速和风量达到最大,为良好的自然通风提供了保障。<br>According to the technical requirements of thermal storage unit of solar ventilation shaft, A composite phase change materials were prepared and applied to the ventilation shaft, and a solar ventilation shaft experimental system using composite phase change material was established, and its operation performance was tested. The results showed that the thermal conductivity and the latent heat of the composite phase change material prepared by adding 5wt% carbon nanotubes were 0.65 W/m.K and 107 J/g respectively, and 2.03 times and 0.718 times of that before adding. And outlet air flow of the solar ventilation shaft experimental system using above material were 55~103.9 m3/h beteewn 10:00 to 21:00, and the time was in 17:00 to the both of maximum value. This provides a guarantee for the natural ventilation. %K 相变材料 热物性 自然通风 热压< %K br> %K phase change materials thermophysical property natural ventilation thermal pressure %U http://qks.cqu.edu.cn/cqdxxbcn/ch/reader/view_abstract.aspx?file_no=20180402&flag=1