某大型火车站公共区冷风渗透热负荷计算

新型火车站是集铁路、地铁、公路、公交于一体的综合交通枢纽,为方便旅客近距离换乘,各功能分区均相连和贯通,在北方采暖地区必然形成一个由下而上的热压通道,且由于火车站客流巨大,公共区空间高大,外门开启频繁,此时,在风压和热压的作用下,会通过外门带入大量的室外冷风。主要针对火车站公共区的冷风渗透,采用CFD模拟计算的方式进行采暖热负荷模拟计算,对直通对开门斗及空气幕的阻隔效果进行了模拟分析,为相近规模及地域的火车站公共区冷风渗透热负荷提供设计参考。

Calculation of Heating Load Caused by Cold Air Infiltration in Public Area of a Large Railway Station

Currently the new station always work as a comprehensive transportation hub which composes of the function of railway, subway, highway and bus traffic. For the convenience of passenger transferring among different forms of transportation in the new railway station, each functional partition and penetration connected, which creates a huge thermal pressure channel inside the station in northern China. Besides, as the passenger flow is great and the entrance and exit doors of railway station open in high frequency, the magnificent cold air infiltration caused by wind and thermal pressure has a significant influence on the heating load of the station. CFD simulation was performed on the cold air infiltration in the public area of a railway station, mainly focused on the calculation of heating load to ensure the reliability of heating system designing. The barrier efficiency of foyer and air curtain system are simulated and analyzed, providing design references for similar size and area railway stations.