Dynamic Simulation of Pressure Head and ChlorineConcentration in the City of Asyut Water Supply Networkin Abnormal Operating Conditions

Hassan Ibrahim Mohamed; Gamal Abozeid

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Dynamic Simulation of Pressure Head and ChlorineConcentration in the City of Asyut Water Supply Networkin Abnormal Operating Conditions

机译：异常工况下阿育王特供水管网压头和氯浓度的动态模拟

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This research tracks the abnormal system operating conditions of the city of Asyut water supply network over an extended period. EPANET software was used to perform hydraulic and water quality analysis. Firstly, the effect of roughness variation with time on pressure head distribution and water quality through the network is simulated. Secondly, leakage due to failure of some pipes on the flow, pressure heads and water quality are investigated. Also the effect of closing some pipes in the network on pressure head and chlorine distributions is taken into consideration. Finally, the effect of changing the source of chlorine disinfection on water quality in the network is studied. The results indicate the following: (1) The increasing roughness of pipes can significantly increase the head losses through the network and consequently decrease the head at the end of network below the minimum limit. The variability in nodal pressures also has a significant effect on chlorine decay if the bulk wall reaction coefficient is taken to be dependent on the roughness of the pipe. (2) The failure of some pipes in the networks not only increases the consumed discharge in the network and decreases the pressure head but also changes the flow directions in some pipes through the network. (3) Closing a pipeline increases pressure in a region and decreases it at another and also changes the direction of flow in the network. This may affect the chlorine distribution through the network. (4) Chlorine disinfection from one source can significantly decrease the residual concentrations under the minimum limit in part of the network, while it can increase variability in nodal concentrations.

机译：该研究跟踪了一段较长时期内阿育特市供水网络的异常系统运行状况。 EPANET软件用于执行水力和水质分析。首先，通过网络模拟了粗糙度随时间变化对压头分布和水质的影响。其次，研究了由于某些管道故障导致的泄漏，压头和水质。还考虑了关闭网络中某些管道对压头和氯气分布的影响。最后，研究了改变氯消毒源对管网水质的影响。结果表明：（1）管材粗糙度的增加会显着增加通过管网的压头损失，从而将管网末端的压头降低到最小极限以下。如果将整体壁反应系数视为取决于管道的粗糙度，则节点压力的变化也会对氯的衰减产生重大影响。（2）网络中某些管道的故障不仅增加了网络中消耗的流量，降低了压头，而且改变了某些通过网络的管道的流向。（3）关闭管道会增加一个区域的压力，并降低另一个区域的压力，还会改变网络中的流动方向。这可能会影响通过网络的氯分布。（4）从一个来源进行氯消毒可以在部分网络的最小限制下显着降低残留浓度，同时可以增加节点浓度的可变性。

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来源
《Arabian Journal for Science and Engineering》 |2011年第2期|p.173-184|共12页
作者
Hassan Ibrahim Mohamed; Gamal Abozeid;
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作者单位

Civil Engineering Department, Asyut University, Asyut, Egypt;

Civil Engineering Department, Asyut University, Asyut, Egypt;

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收录信息美国《科学引文索引》(SCI);
原文格式 PDF
正文语种 eng
中图分类
关键词
pipe network; water quality; abnormal operation; extended period simulation;

机译：管网;水质;异常运行;延长期模拟;

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Dynamic Simulation of Pressure Head and ChlorineConcentration in the City of Asyut Water Supply Networkin Abnormal Operating Conditions

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