MNF法在DMA小区漏损管理中的综合分析运用

Comprehensive analysis and application of MNF method in DMA community leakage management

采用夜间最小流量(MNF)法对300个DMA小区的漏损管理进行综合运用,结果显示:对于DMA小区的存量漏失,可以采用MNF定额法和比例法进行综合判定;对于DMA小区的新增漏失,可以采用新增MNF值或者新增MNF比例值对比历史数据进行判定,但必须用流量分布法辅助判断。应用实践表明,MNF法在DMA小区漏损管理中的综合运用非常有效,2021年7月到2022年6月近1年里共发现37个小区暗漏,每年节约水量3187728 m 3,显著节省了水费和二次供水泵房电耗。

The minimum night flow(MNF)method was applied to the leakage management of 300 DMA communities,and the results showed that MNF quota method and proportion method could be used to comprehensively determine the stock leakage of DMA community.For the new leakage of DMA community,the newly increased MNF value or the newly increased MNF proportional value could be used to compare the previous data,but the traffic distribution method must be used for assisting determination.The practice proved that the comprehensive application of MNF method in DMA community leakage management was very effective.In the nearly one year from July 2021 to June 2022,a total of 37 hidden leaks in community had been found,saving 3187728 m 3 of water per year,and significantly saving the water cost and the power consumption of the secondary water supply pump station.