基于实际管网特性的并联水泵节能运行研究  

Energy-saving Operation Research of Parallel Pumps Based on Actual Pipeline Characteristics

作　　者：梁云 赵晓宇 贺延壮 LIANG Yun;ZHAO Xiaoyu;HE Yanzhuang(Tongfang Smart Energy Co.Ltd.,Beijing 100000,China)

机构地区：[1]同方智慧能源有限责任公司,北京100000

出　　处：《应用能源技术》2023年第7期38-44,共7页Applied Energy Technology

摘　　要：文中分析了影响实际管网特性的两个主要因素,管网最小阻力的存在导致实际水泵变频运行曲线与额定工况不相似,水泵运行台数的增减会导致管网阻抗系数改变,两者都会导致并联水泵运行调节时能耗大于理论上的相似估算值。为进行并联变频泵组节能运行优化,建立了数学模型,编写了python程序,可计算不同目标流量下水泵运行的最佳方案。结合实际案例,给出了水泵变频运行下限的计算方法,仿真模拟验证了该优化方法可以计算得到不同情况下运行方案之间的能耗差异,并分析了管网最小阻力和台数不同时的运行能耗量化结果,其中水泵运行台数增减导致管网阻抗系数的改变对能耗的影响更大。该研究基于水泵运行时面临的实际问题提出的解决方案,为挖掘水泵节能潜力、提升能耗预测精度提供参考。This paper analyzes two main factors affecting the characteristics of actual pipeline networks.The existence of the minimum resistance in the pipeline network causes the actual frequency conversion operation curve of the water pump to be dissimilar to the rated condition.Changes in the number of pump units can alter the impedance coefficient of the pipeline network.Both factors can lead to energy consumption during the adjustment of parallel pump operation being greater than theoretically estimated values.To optimize the energy-saving operation of parallel variable-frequency pump units,a mathematical model is established,and a Python program is developed to calculate the optimal operation of pumps at different target flow rates.Combining practical cases,the paper provides a method to calculate the lower limit of the variable-frequency pump operation and simulates and verifies that this optimization method can calculate the energy consumption differences between different operation scenarios.The study also analyzes the quantitative results of energy consumption when the minimum resistance in the pipeline network and changes in the number of pump units occur,emphasizing that the change in the impedance coefficient of the pipeline network due to the increase or decrease in the number of pump units has a greater impact on energy consumption.This research proposes solutions based on the practical problems faced during pump operation,providing a reference for exploring the energy-saving potential of pumps and improving energy consumption prediction accuracy.

关 键 词：实际管网特性 最小阻力 节能运行优化 数学模型 仿真模拟 

分 类 号：TK018[动力工程及工程热物理]