| Cite this article: | 赵德芳,庞小燕,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,,():-. |
| ZHAO Defang,PANG Xiaoyan,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,,():-. |
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| Estimating Water Consumption from Electricity Consumption for axial flow pumps under variable head conditions |
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ZHAO Defang1, PANG Xiaoyan2, YANG Lihu3, ZHANG Chunyue4, LIU Enmin3
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1.Water Resources Bureau of Lingcheng District,Dezhou City;2.Water Resources Bureau of Yucheng City;3.Key Laboratory of Water Cycle and Related Land Surface Processes,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences;4.Water Resources Bureau of Linyi County
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| Abstract: |
| 【Purpose】Field metering facilities are severely damaged, with many failure points and maintenance difficulties, and the guarantee rate of water metering is very low, creating a situation where the investment and operation and maintenance costs of metering facilities are high, while the guarantee rate of water data collection is low. Water pumping water amount and electricity consumption is closely related, the use of electricity to convert the water coefficient to calculate water consumption is concerned, improve the reliability of measurement while reducing investment, but there is not enough depth of theory, conversion coefficient determination method is cumbersome, the problem of low metering accuracy.【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 analysed.【Results】The results show that head variation directly affects 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%), and that using head to revise Tc The accuracy can be greatly improved.【Conclusion】Referring to the slope of the H-Tc curve deduced from the pump characteristic curve, the method of correcting Tc with the measured Tc value of the single point head can simplify the workload of the actual Tc measurement; from the analysis of the energy conversion efficiency, the efficiency of the pump system converting electrical energy into potential energy is relatively stable and does not change with the head, 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 is expected to be controlled within 15%. The research method can be used as the basis for electric water conversion in axial flow pumps, and has reference significance for other types of pumping stations. |
| Key words: Electricity; converting electricity to water; Axial pumps; delivery head; Water amount; Energy conservation |
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