建筑竖向通道机械加压送风量的计算分析

Calculation analysis of mechanical smoke control volume for vertical means of escape

针对竖向通道可能存在的四种机械加压送风设计工况,采用公式法计算不同层数建筑防烟楼梯间及前室、合用前室的加压送风量,并与《建筑防排烟系统技术规范》中规定的加压送风量进行比较分析。分析误差产生的原因,讨论以楼层数分界与以建筑高度分界,对加压送风量的取值提出建议。

The four possible conditions of mechanical air supply design were chosen as the research object.The smoke control volume of smoke-proof staircase,antechamber and combinedused antechamber in different buildings were calculated by formula method and the results were compared with the regulation,Technical Code for Building Smoke Control and Smoke Management System,provision under the same conditions.Besides,combined with discussion of error causes,floor number dividing and building height dividing were discussed,the proposal on selection of smoke control volume was put forward.