Research And Application On Natural Wind And Complementary Wind In Subway Tunnel Ventilation

Aiming at the tunnel ventilation project mainly adopts the piston wind ventilation shaftand both ends of the natural wind ventilation mode, the transformation of the constructionprocess of shaft is used to the rational use of natural wind in tunnel ventilation, to reduce theenergy consumption,the application of the new method is less interval mechanical wind tunnelmachine, improving air quality.On the basis of the subway project of numerous city domestictunnel ventilation system, according to ventilation and experience with natural wind tunnelventilation,I study the combined with the special nature of the piston wind, which is theassociation between various factors in-depth study of tunnel ventilation system of naturalwind ventilation numerical calculation method; considering the range of piston wind and therole of the natural wind, the natural wind which is derived from the subway the tunnel underthe condition of multi shaft ventilation;, combined with the necessity of shaft construction ofcivil construction. this article mainly expounds that the interval tunnel of subway "mixingshaft"(natural ventilation in the normal operation of the locomotive as the piston windventilation effect, and when accident occurs, the natural ventilation as exhaust ventilation andnatural ventilation shaft tunnel interaction) will be divided into several sections, influenceingof new shaft tunnel piston wind in locomotive section size, in smokeing and fire conditions, Imust consider the natural wind control section size, and eliminate smoke turbulence in the fire.The multi shaft intermediate laying auxiliary fan, improving the ability of natural wind andsmoke control size. To improve the quality of the tunnel ventilation,we must reduce energyconsumption of locomotive air condition, ta provides the important basis for the future Metroenergy saving.