消防排烟环网系统可行性分析

Feasibility analysis of smoke exhaust loop network systems

在消防排烟枝状系统基础上,本文提出了消防排烟环网系统。以某大型体育建筑比赛场馆的高大空间为例,对比了采用消防排烟枝状系统、单源环网系统与多源环网系统3个排烟系统的可行性。采用水力计算法分析了几个排烟系统满足GB 51251-2017《建筑防烟排烟系统技术标准》的情况,并给出了单源环网系统的风管优化限度百分比。依据可靠性理论,分析了常见事故下消防排烟环网系统的故障率及可靠性。结果表明,环网系统可以有效提高系统可靠性,单源环网系统故障率是枝状系统故障率的28.1%,以该项目为例的多源环网系统故障率是枝状系统故障率的11.6%。

This article proposes a smoke exhaust loop network system based on the branch system.Taking the tall space of a large sports building competition venue as an example,this paper compares the feasibility of three smoke exhaust systems,including the branch system,single-source loop network system,and multi-source loop network system.The hydraulic calculation method is used to analyse the conditions of several smoke exhaust systems to meet GB 51251-2017 Technical standard for smoke management systems in buildings,and to provide the percentage of air duct optimization limits for the single-source loop network system.Based on the reliability theory,the failure rate and reliability of the smoke exhaust loop network system under common accidents are analysed.The results show that the loop network system can effectively improve system reliability.The fault rate of a single-source loop network system is 28.1%of a branch system,and the fault rate of a multi-source loop network system in this project is 11.6%of a branch system.