非屏蔽门地铁车站站台空调系统冷量有效利用率的数值分析

针对非屏蔽门闭式地铁站台,来自区间隧道的活塞风将影响站台空调送风射流,从而影响站台冷量的分布。在此两股气流相互的耦合基础上,提出了站台空调冷量有效利用率的概念。采用计算流体力学(CFD)方法,建立闭式地铁站台三维几何模型,模拟得到了列车在区间匀速运行、减速进站、停站和加速离站4个阶段的地铁站台1.5 m高度水平面的速度场和温度场,并以此计算分析了相应车况下,站台空调冷量有效利用率。由变因素分析,得到冷量利用率受空调送风温度和送风口数量影响最显著。

CFD Analysis on the Effective Utilization Rate of Air-Conditioning Cold Quantity for Subway Without Platform Screen Doors

The piston wind from the tunnel influences the platform air-conditioning airflow and distribution of subway cold quantity for the subway without platform screen doors. The concept of effective utilization rate of platform air-conditioning cold quantity was proposed at the basis of coupling between the piston wind and air-conditioning airflow. The CFD is utilized to build a closed three-dimensional geometry model of subway platform. When metro train was running in constant speed, deceleration, stopping in platform and acceleration away from the platform, simulations were carried about velocity and temperature fields in 1.5 m horizontal plane of subway platform. The effective utilization rate of subway platform cold quantity is calculated and analyzed in four stages. The rate was obviously affected by supplying air temperature and the quantity of air supply outlet by changing factors analysis.