通风网络模型在地铁新风系统风量渗漏计算中的应用

Application of ventilation network model in calculation of air volume leakage in subway fresh air system

针对传统渗漏风量估算方法存在较大误差这一缺点,此次研究构建了一种地铁站通风网络模型以计算屏蔽门渗漏风量,同时对地铁站出入口渗漏风的特性及其影响因素展开了讨论。结果显示,模型中3个出入口的模拟的风量分别为2.97 m^(3)/s、7.89 m^(3)/s和7.44 m^(3)/s,实测风量分别为2.75 m^(3)/s、8.21 m^(3)/s和7.39 m^(3)/s,其基本一致,验证了所提方法的准确性和有效性;出入口的弯头数量、面积变化均能对渗漏风量产生影响。该项研究能够为地铁车站环控系统的节能设计与调控提供指导价值。

In view of the large error of traditional estimation methods of leakage air volume,a subway station ventilation network model was constructed to calculate the leakage air volume of shielding doors,and the characteristics and influencing factors of leakage air at subway entrances and exits were discussed.The results show that the simulated air volume of the three entrances and exits in the model is 2.97 m^(3)/s,7.89 m^(3)/s and 7.44 m^(3)/s,respectively,while the measured air volume is 2.75 m^(3)/s,8.21 m^(3)/s and 7.39 m^(3)/s,respectively,which are basically consistent,verifying the accuracy and effectiveness of the proposed method.The change of elbow quantity and area of inlet and outlet can affect the leakage air volume.This study can provide guidance value for the energy-saving design and regulation of the environmental control system of subway stations.