基于实时仿真的离心泵-调节阀-管道系统节能研究
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摘要
以某凝水输送系统中离心泵-调节阀-管道系统为对象,利用实时仿真方法分析了典型离心泵-调节阀-管道系统中的能耗特性。考虑调节阀的流量特性以及离心泵的性能曲线,建立了描述离心泵凝水输送系统的一维实时仿真模型,利用流体网络法对守恒方程求解,得到了不同工况下各个部件的能耗分布。分析了在变工况过程中,调节阀的畸变特性与能耗分配关系,得到了原系统设计方案中的能耗曲线,进一步对比了离心泵定速与调速运行两种方案下的系统能耗;最后分析了调节阀调控与离心泵调速综合作用下的系统能耗特性。结果表明,系统中调节阀的能耗随着开度的增加,呈现先增大后减少的变化规律,且不同类型的调节阀,能耗的分布有所区别。当离心泵调速运行时,离心泵和调节阀的能耗均有所下降。当调节阀设计开度低于1.0时,建议在降负荷过程中采用泵调速运行方案来调节系统流量;升负荷过程采用调节阀调节来控制系统流量。
In this paper, the centrifugal pump-control valve-pipeline system in a condensation water system is taken as an object, and the energy consumption characteristics of the system are analyzed by real-time simulation method. The flow characteristic of control value and centrifugal pump performance curve are considered, and the one-dimensional real-time simulation model for the pump system is established. The energy consumption distribution of various components under different conditions is obtained by solving the conservation equation using the fluid network method. The relationship between the distortion characteristics of the control valve and the energy consumption distribution during the off-design process is analyzed, and the energy consumption curve of the original system design scheme is obtained. The energy consumption of the centrifugal pump under the two schemes of constant speed and variable speed operation is further compared. Finally, the energy consumption characteristics of the centrifugal pump under the combined action of the control valve and variable speed operation are analyzed. The results show that the energy consumption of the control valve in the system increases first and then decreases with the increase of the opening, and the distribution of energy consumption is different for different types of control valves. When centrifugal pumps are running at variable speed condition, the energy consumption of centrifugal pump and control valve are both declined. When the design opening of the control valve is less than 1.0, it is suggested that the pump speed regulation operation scheme be used to regulate the system flow during load reduction and the control valve is used to control the system flow during load increase.
In this paper, the centrifugal pump-control valve-pipeline system in a condensation water system is taken as an object, and the energy consumption characteristics of the system are analyzed by real-time simulation method. The flow characteristic of control value and centrifugal pump performance curve are considered, and the one-dimensional real-time simulation model for the pump system is established. The energy consumption distribution of various components under different conditions is obtained by solving the conservation equation using the fluid network method. The relationship between the distortion characteristics of the control valve and the energy consumption distribution during the off-design process is analyzed, and the energy consumption curve of the original system design scheme is obtained. The energy consumption of the centrifugal pump under the two schemes of constant speed and variable speed operation is further compared. Finally, the energy consumption characteristics of the centrifugal pump under the combined action of the control valve and variable speed operation are analyzed. The results show that the energy consumption of the control valve in the system increases first and then decreases with the increase of the opening, and the distribution of energy consumption is different for different types of control valves. When centrifugal pumps are running at variable speed condition, the energy consumption of centrifugal pump and control valve are both declined. When the design opening of the control valve is less than 1.0, it is suggested that the pump speed regulation operation scheme be used to regulate the system flow during load reduction and the control valve is used to control the system flow during load increase.
引文
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[11] 徐瑛瑛,莫岳平,吴松,等.内反馈电动机运用于泵站的节能效益分析[J].排灌机械工程学报,2016,34(1):38-44.
[12] 汤跃,张新鹏,黄志攀,等.离心泵变压供水系统控制模型辨识的试验研究[J].农业工程学报,2012,28(7):189-193.
[13] 聂建英,于洋,罗雄麟.离心泵变频控制对流量控制性能的影响分析[J].化工自动化及仪表,2013,40(4):485-489.
[14] 吕崇德.大型火电机组系统仿真与建模[M].北京:清华大学出版社,2002.
[15] WANG C Y,LIU M,LI B X,et al.Thermodynamic analysis on the transient cycling of coal-fired power plants:Simulation study of a 660 MW supercritical unit[J].Energy,2017,122(1):505-527.
[16] IEC 60534-2-1 Industrial-process control valves-Part 2-1:Flow capacity-Sizing equations for fluid flow under installed conditions,Switzerland[S].2011.
[2] 祝铃钰,施佳琪,郑成霖,等.离心泵网络的节能设计与操作优化:综述与展望[J].高校化学工程学报,2017,31(6):1245-1258.
[3] 王凯,刘厚林,袁寿其,等.离心泵多工况水力性能优化设计方法[J].排灌机械工程学报,2012,30(1):20-24.
[4] 周钟.空调箱调节阀的选择与节能[J].暖通空调,2018,48(5):17-26.
[5] 谢玉东,王勇,刘延俊.调节阀技术研究综述[J].化工自动化及仪表,2012,39(9):5-8.
[6] LISOWSKI E,FILO G,RAJDA J.Pressure compensation using flow forces in a multi-section proportional directional control valve[J].Energy Conversion and Management,2015,103:1052-1064.
[7] PRIYANKA E B,MAHESWARI C,THANGAVEL S.Online Monitoring and Control of Flow rate in Oil Pipelines Transportation System by using PLC based Fuzzy-PID Controller[J].Flow Measurement and Instrumentation,2018,62:144-151.
[8] OLSZEWSKI P,ARAFEH J.Parametric analysis of pumping station with parallel-configured centrifugal pumps towards self-learning applications[J].Applied Energy,2018,231(1):1146-1158.
[9] 汤跃,马正军,戴盛,等.冷却循环水系统节能及应用[J].排灌机械工程学报,2012,30(6):705-709.
[10] 何武全,张华,何欣烨,等.变频调速分级恒压灌溉自动控制系统及应用[J].排灌机械工程学报,2016,34(11):1003-1007.
[11] 徐瑛瑛,莫岳平,吴松,等.内反馈电动机运用于泵站的节能效益分析[J].排灌机械工程学报,2016,34(1):38-44.
[12] 汤跃,张新鹏,黄志攀,等.离心泵变压供水系统控制模型辨识的试验研究[J].农业工程学报,2012,28(7):189-193.
[13] 聂建英,于洋,罗雄麟.离心泵变频控制对流量控制性能的影响分析[J].化工自动化及仪表,2013,40(4):485-489.
[14] 吕崇德.大型火电机组系统仿真与建模[M].北京:清华大学出版社,2002.
[15] WANG C Y,LIU M,LI B X,et al.Thermodynamic analysis on the transient cycling of coal-fired power plants:Simulation study of a 660 MW supercritical unit[J].Energy,2017,122(1):505-527.
[16] IEC 60534-2-1 Industrial-process control valves-Part 2-1:Flow capacity-Sizing equations for fluid flow under installed conditions,Switzerland[S].2011.
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