| 引用本文: | 赵德芳,张春越,杨丽虎,等.变扬程条件下轴流泵以电折水方法研究[J].灌溉排水学报,2023,42(S1):129-134. |
| ZHAO Defang,ZHANG Chunyue,YANG Lihu,et al.变扬程条件下轴流泵以电折水方法研究[J].灌溉排水学报,2023,42(S1):129-134. |
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| 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。 |
| 关键词: 电量；以电折水系数；轴流泵；扬程；水量；能量守恒 |
| DOI：10.13522/j.cnki.ggps.2023108 |
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| 基金项目: |
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| Estimating Water Consumption from Electricity Consumption for Axial Flow Pumps under Variable Head Conditions |
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ZHAO Defang, ZHANG Chunyue, YANG Lihu, LIU Enmin
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1. Water Resources Bureau of Lingcheng District, Dezhou City, Dezhou 253500, China; 2. Water Resources Bureau of Linyi County, Linyi 251500, China; 3. 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
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| Abstract: |
| 【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 Tc for 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-Tc curve deduced from the pump characteristic curve, the method of correcting Tc with the measured value of the single point head can simplify the workload of the actual Tc measurement; 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%. |
| Key words: electricity; converting electricity to water; axial pumps; delivery head; water amount; energy conservation |
