摘要
设计了一种由太阳能吸热板、弯曲流道以及多孔材料单元组成的呼吸墙.作为一种可过滤大气尘颗粒的新型墙体,呼吸墙具有良好的运用前景,但是关于呼吸墙过滤效率的计算建模却鲜有研究.采用经典理论模型计算多孔材料的过滤效率,运用统计方法计算弯曲流道内的过滤效率.统计方法中通过追踪弯曲流道内颗粒轨迹来统计弯曲流道内的沉积颗粒数,进而获得颗粒在弯曲流道内的净化效率.为了验证以上模型,利用颗粒计数器对呼吸墙内沿程颗粒数量浓度变化进行了测试,并与计算值相对比.结果表明,提出的计算模型可有效地预测呼吸墙对气载颗粒的过滤效率.
To maintain adequate ventilation while filtering the imported air into residential buildings,the breathing wall seems to be an alternative to replace the traditional well-sealed wall.The breading wall is composed of a solar absorbed plate,a zigzag flow channel,and a porous media unit.In this study,a numerical model is proposed to predict particle filtration in the breathing wall.In addition,an empirical model is adopted to predict particle filtration efficiency in porous media,whilst a statistical method is adopted to model particle deposition rate in the zigzag flow channels,where particles are tracked by disperse phase model.An experiment test was implemented to obtain data to validate the proposed numerical model.The particles are counted by an aerosol counter.It is found that the model can predict the particle filtration efficiency in reasonably good agreement with the measurement,which justifies validity of the developed model.
出处
《辽宁大学学报（自然科学版）》
CAS
2013年第2期125-131,共7页
Journal of Liaoning University：Natural Sciences Edition
基金
国家自然科学基金(50978039)
关键词
呼吸墙
弯曲流道
多孔材料
过滤效率
气载颗粒物
breathing wall
zigzag flow channel
porous media
particle filtration
airborne particles
