EPANETH在有水塔管网平差中的应用

Application of Using EPANETH in Adjustment Calculation of the Water Supply Pipe Network with a Water Tower

从管网平差的定义和在供水管网系统设计中的重要性出发,指出了采用哈代-克罗斯法的弊端和EPANETH在管网平差中的算法及适用范围.选取了1个有清水池和水塔的给水管网的例子,在软件上直接建立管网模型,从管段、节点信息输入及处理方面入手,阐述了如何应用EPANETH来计算有水塔管网情况.结果用管段流量-节点压力图、管段流速-节点需水量图、节点总水头-管段流量图等表现,并详细说明了管段直径设计原则和做法;详细校核了水塔转输工况和自由水压情况,通过分析得出根据最高时确定的管径,不能满足转输时进入水塔流量的结论;最后通过反复调整个别管段管径,达到了要求,各节点的自由水压均满足要求;指出了软件使用时的一些注意事项.

Starting from the definition and the importance of pipe network adjustment in water supply system design, this paper points out the traditional pipe network adjustment by Hardy Clowes method shortcomings, by referencing water supply network with a pool and a water tower for example, directly established network model by the software and from the basic information input and processing aspects, expounds that how to use EPANETH software for water supply pipe network adjustment hydraulic calculation, calculation results by using pipe flow-node pressure graph, pipe flow-nodes need to water graph, nodes total head - pipe flow diagram displayed, it explains the principles and practices of the Pipe diameter design, check the tower transfer condition and free water pressure, by analysis ,the conclusion that the determining the diameter in the highest condition it can＇t meet the transfer into the water tower flow, through repeated adjustment of individual pipe diameter of pipe section, and it meets the requirements, each node of the free water meets the requirements, at the end the paper points out some cautions in using the software, in short, the application of EPANETH in the towers of the water pipe network adjustment calculation is the certain practical significance.