本科毕业设计外文文献与译文文献、资料题目：Sealed building drainage and vent systems文献、资料来源：国道数据库文献、资料发表（出版）日期：2024.6院 （部）：市政与环境工程学院专 业： 给水排水工程班 级：水工 122姓 名：涛学 号：指导老师：谭凤训翻译日期： 2024.6外文文献：Sealed building drainage and vent systems—an application of active air pressure transient control and suppressionAbstractThe introduction of sealed building drainage and vent systems is considered a viable proposition for complex buildings due to the use of active pressure transient control and suppression in the form of air admittance valves and positive air pressure attenuators coupledwith the interconnection of the network's vertical stacks.This paper presents a simulation based on a four-stack network that illustrates flow mechanisms within the pipework following both appliance discharge generated, and sewer imposed, transients. This simulation identifies the role of the active air pressure control devices in maintaining system pressures at levels that do not deplete trap seals. Further simulation exercises would be necessary to provide proof of concept, and it would be advantageous to parallel these with laboratory, and possibly site, trials for validation purposes. Despite this caution the initial results are highly encouraging and are sufficient to confirm the potential to provide definite benefits in terms of enhanced system security as well as increased reliability and reduced installation and material costs. Keywords:Active control; Trap retention; Transient propagation NomenclatureC +- ——characteristic equations c——wave speed, m/s D——branch or stack diameter, m f——friction factor, UK definition via Darcy Δ h =4fLu 2 /2Dg g——acceleration due to gravity, m/s 2 K...
