关键词：
电量;以电折水系数;轴流泵;扬程;水量;能量守恒
摘 要：
[目的]探究变扬程条件下轴流泵适宜以电折水方法.[方法]在定性分析轴流泵的以电折水系数(Tc)随扬程H变化的基础上,结合抽水试验结果,分析扬程变化对水电转换系数的影响.[结果](1)扬程变化直接影响以电折水系数Tc,用固定的Tc值进行以电折水的转换必然导致很大的误差(超50%),用扬程对Tc进行订正,可大幅提高精度;(2)参考水泵特性曲线推导出的H-Tc曲线的斜率,用单点扬程的实测Tc值对Tc进行修正的方法,可简化实测Tc的工作量;(3)从能量转化效率分析,轴流泵的水泵系统将电能转换为势能的效率比较稳定,不随扬程变化,[结论]依据能量平衡原理提出电量-效率-扬程模型,是一种新的探索,计算水量的误差有望控制在15%以内.
译 名：
Estimating Water Consumption from Electricity Consumption for Axial Flow Pumps under Variable Head Conditions
单 位：
Water Resources Bureau of Lingcheng District,Dezhou City,Dezhou 253500,China;Water Resources Bureau of Linyi County,Linyi 251500,China;Key Laboratory of Water Cycle and Related Land Surface Processes,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China
关键词：
electricity%converting electricity to water%axial pumps%delivery head%water amount%energy conservation
摘 要：
[Objective]To study the suitable method of electric water diversion for axial flow pump under variable head.[Method]Based on a qualitative analysis of the variation of the electric water conversion factor(Tc)of axial flow pumps with head H,combined with the results of pumping experiments,the impact of head variation on the water-electric conversion factor was analyzed.[Result]①Head variation directly affected the electric water conversion factor Tc,and that using a fixed value of Tcfor electric water conversion inevitably leads to a large error(over 50%),while using head to revise Tc,the accuracy could be greatly improved.②Referring to the slope of the H-Tccurve deduced from the pump characteristic curve,the method of correcting Tcwith the measured value of the single point head can simplify the workload of the actual Tcmeasurement;③From the analysis of the energy conversion efficiency,the efficiency of the pump system converting electrical energy into potential energy was relatively stable and did not change with the head.[Conclusion]Based on the energy balance principle to propose the power-efficiency-head model,which is a new exploration,the error of calculating the water volume can be reduced less than 15%.
