湿热季地下车库诱导射流改善表面结露和CO污染

Application of Inductive Air Jet to Underground Garage for Reducing both Surface Condensation and CO Pollution in Hot and Humid Climate

针对上海某高层办公楼纵深型地下车库空间湿热季内表面严重结露问题,在原通风系统分布式均匀排风主导的情况下,测试分析了表面结露状况.改进设计了一套诱导射流系统,兼顾墙面贴附射流和地面冲击射流效应,提高近壁气流速度和湍流换热水平,使得表面对流换热和表面温度明显升高,在湿热季车库通风时段显著改善表面结露问题.同时,该系统解决了原有系统在纵深区域CO气态污染排除不畅、呼吸区积聚浓度偏高的问题.

This study tries to resolve the serious condensation problem of a large underground garage with the deeply spatial pattern in Shanghai, which is ventilated by the dominant effect of uniformly distributed exhausts. Test and analysis of surface condensation are carried out in the originally equipped system. An inductive air-jet system is presented by taking into account the attached effect along wall and impinging effect on the floor. The system is applied to intensifying the air velocity and turbulent level near the surface so as to increase the surface heat transfer and temperature. The surface condensation is comfirmed to be significantly reduced in the hot and humid season by the inductive air jets. Meanwhile, the improved system also reduces the accumulation of concentration of CO gaseous pollution at the breathing zone in the garage.