高层建筑前室加压送风系统设计优化与风量控制
Pressurization system design optimization and air rate control for anteroom in high-rise buildings
摘要：
高于24 m的高层建筑，其前室加压系统需对着火层及其上下2层的送风量进行控制，还需对大小2种风量及可能发生的大小风量间的切换作出快速反应。标准图15K606提供的“前室采用旁通管控制加压送风正压值原理图”，仅提出前室与走道之间的压差应为25~30 Pa的控制要求，并未给出前室开门时保持门洞风速所对应的压差控制要求。为弥补标准图的不足，优化前室加压送风系统控制，提出了在所有前室增设特制的电动双风量蝶阀配合系统末端设置3个电动旁通阀的解决方案，并通过系统设计计算举例，阐述了阀门的选型方法及系统的设计逻辑。
Abstract：
The anteroom pressurization system for a high-rise building over 24 meters, needs to control the air rates of the firing floor as well as its adjacent floors. Meanwhile, the system needs to response quickly to two kinds of required air rates and their transferring. According to a schematic diagram showed in the 15K606, it requires the positive pressure value inside the anterooms of all three floors maintaining from 25 Pa to 30 Pa, but ignores the differential pressure control requirement when the anteroom door is open. In order to overcome the shortage of schematic diagram and optimize the anteroom pressurization system, presents a solution that each anteroom equips with a specialized electrical dual air rate butterfly valve linkage with three electrical bypass valves. Explains the valve selection method and the design logic based on a system calculation example.
Keywords:high-risebuilding,anteroom,pressurizationairsupply,windspeedindoorway,dualairratebutterflyvalve,transmissiondelay,terminalbypass