自动喷水灭火系统管系特性系数法的探讨

Discussion on Piping Characteristic Coefficient in Hydraulic Calculation of Sprinkler System

目前《给水排水设计手册》中所介绍的特性系数法水力计算仅适用于系统为对称布置的情况,导致对于非对称布置系统应用特性系数法进行水力计算存在困难。通过对管系特性系数的实质和影响因素进行理论分析,提出了利用虚拟节点水压和虚拟节点流量来计算非对称布置情况下非最不利配水支管管系特性系数的方法,完善了特性系数法在自动喷水灭火系统水力计算中的应用,使特性系数法可适用于各种布置形式的自动喷水灭火系统水力计算。

The characteristic coefficient method from the Water Supply and Drainage Design Manual was applied only to the hydraulic calculation of the symmetrical arrangement system. This led to a more difficult use of the characteristic coefficient method on the hydraulic calculation of the asymmetric arrangement system. Through analyzing the reasoning and influencing factors of the piping characteristic coefficient, a hydraulic calculation method which makes use of virtual node pressure and flow to calculate the piping characteristic coefficient of the non-most unfavorable branch pipe was proposed. The method improved the application of piping coefficient in the hydraulic calculation of sprinkler systems, and it could be used to calculate many forms of hydraulic calculations of sprinkler systems.