| 引用本文: | 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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| 变扬程条件下轴流泵以电折水方法研究 |
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赵德芳1, 庞小燕2, 杨丽虎3, 张春越4, 刘恩民3
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1.德州市陵城区水利局;2.禹城市水利局;3.中国科学院 地理科学与资源研究所陆地水循环及地表过程重点实验室;4.临邑县水利局
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| 摘要: |
| 【目的】 野外计量设施破坏严重、故障点多、维护困难,水量计量的保证率很低,形成了计量设施投资和运行维护成本高,而水量数据采集保证率低的局面。水泵提水量与耗电量密切相关,采用以电折水系数推算用水量受到关注,提高计量可靠性的同时又减少了投资,但存在理论不够深入、折算系数测定方法繁琐、计量精度低的问题。【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,结合抽水实验结果,分析扬程变化对水电转换系数的影响,【结果】结果显示,扬程变化直接影响着以电折水系数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。【结论】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；从能量转化效率分析,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,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。研究方法可作为轴流泵以电折水的依据,对其他类型泵站有参考意义。 |
| 关键词: 电量; 以电折水系数; 轴流泵; 扬程; 水量; 能量守恒 |
| DOI： |
| 分类号:S275 |
| 基金项目:国家自然科学基金(41877161) |
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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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