摘要
压力管理作为一种漏失水量控制措施正逐步受到重视,合理评估压力管理对漏失水量的降低程度,对比较压力管理的投资和收益十分重要。针对实测方法中的降压测试法和水平衡分析对比法分别进行了分析。通过分析供水总流量的测量误差、供水水压对用水流量的影响、用水流量和用水量的不稳定性,证明了降压测试法依托的等效漏点指数模型在实际操作性方面并不可行,上述4个方面均会对漏失水量降低程度的评估造成很大影响;通过推理及试验数据分析证明,等效漏点指数模型存在理论上的缺陷,会对漏失水量降低程度的评估造成进一步的偏差。通过阐述水平衡分析对比法自身特点及误差,证明该方法难以单独区分压力管理的作用,会对评估结果造成不可估量的误差。可见,采用实测方法评估压力管理对漏失水量降低程度是不适用的。
The pressure management is an increasingly accepted method in the real losses control strategy. Reasonable assessment of the extent of real losses reduction is critical to evaluate the investments and returns of the pressure management. The two measurement methods, pressure reduction experimental method and water balance analysis comparison method, were analyzed separately. The analyses of the uncertainties in the total water supply flow measurements, the impact of water pressure on the water consumption, and the fluctuation in the flows and volumes of the water consumption revealed that the equivalent leak exponent model ( ELEM), which the pressure reduction experimental method relied on, was in appropriate from the practical operation perspective. Additionally, the aforementioned four aspects had great impacts on the assessment of the real losses reduction. The formula derivation and the analysis of experimental data proved a theoretical defect in the ELEM, which further deviated the assessment of the real losses reduction. The features and uncertainties in the water balance analysis comparison method were analyzed. The method could not distinguish the impact of pressure management, which could introduce unknown errors to the evaluation. The measurement method was inappropriate for assessing the extent of real losses reduction attributed to pressure management.
作者
郑成志
赵焱
孙国胜
李冬平
徐叶琴
高金良
崔福义
ZHENG Cheng-zhi;ZHAO Yan;SUN Guo-sheng;LI Dong-ping;XU Ye-qin;GAO Jin-liang;CUI Fu-yi(Guangdong GDH Water Co. Ltd.,Shenzhen 518021,China;School of Environment,Harbin Institute of Technology,Harbin 150090,China;Guangdong Yuegang Water Supply Co,Ltd.,Shenzhen 518021,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2019年第19期50-56,共7页
China Water & Wastewater
基金
深圳市科技计划项目(KJYY20170413170501147)
国家水体污染控制与治理科技重大专项(2017ZX07501002)
关键词
供水管网
漏失水量
压力管理
漏损控制
实测方法
water distribution network
real losses
pressure management
leakage control
measurement method
