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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5h-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。
In the construction of urban rail transit, the design of ventilation and air-conditioning system is usually done by using horizontal ventilation in the station tunnel, jet fan in the special tunnel section, air-conditioning system using the double air blower once-return air system, ; Set a new air volume operation, the minimum number of ventilation take 5h-1; water system uses a pump flow system, centralized cooling and so on. Combined with the characteristics of urban rail transit project, the reasonableness of these practices is discussed in terms of system economy and safety.