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| DOI：10.13522/j.cnki.ggps.2023108 |
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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 |
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