对城市轨道交通通风空调系统设计若干习惯做法的质疑
Query on some regular practice of HVAC system design in domestic urban rail transit engineering By Liu Yijiang
摘要：
在城市轨道交通建设中，通风空调系统设计的习惯做法是：站内隧道采用横向通风；特殊隧道区段配置射流风机；空调系统采用双风机一次回风全空气系统、上送上回的气流组织形式；定新风量运行，最小换气次数取5 h-1；水系统采用一级泵定流量系统、集中供冷等。结合城市轨道交通工程的特点，从系统经济性及安全性的角度对这些习惯作法的合理性进行了探讨。
Abstract：
In urban rail transit construction, the regular practice during the design of HVAC system are transversal ventilation in station tunnel, jet fans installed in non-typical section tunnel, primary return air all-air system with dual fans, up-supply and up-return air distribution, constant outdoor air volume, 5 h-1 minimal air change rate, constant water volume system with primary pump, central cooling, etc. Combining with the characteristics of urban rail transit engineering, discusses the rationality of these regular practice from the points of view of the economy and safety of the system.
Keywords:railtransit,transversalventilation,jetfans,dualfans,airdistribution,constantoutdoorairvolume,constantwatervolumesystemwithprimarypump,centralcooling