离心泵变频控制对流量控制性能的影响分析

102249。。。TH311A1000-3932201304-0485-051。。20802。。———3。3。。。1＊14Q0Q1R0R1n0H0H1ABH1OQ1B。R0n0n1H0H2ACH2OQ1C。SH1OQ1B＞SH2OQ1C5～8。1920%Q、HnQ1Q0=n1n0H1H0=n1n()025844．*2012-11-1920976193Q0Q1H0H2。。。“”。。22。2。2“1”“2”ρgz1+p1+ρu122+Δp=ρgz2+p2+ρu222+ΔpL1u———z———“1”Δp———ΔpL———。10ΔpQΔp=a+bQ+cQ2a、b、c11ΔpL=bL1-2Q2bL1-2=λl1-2+∑leD+∑()ξ·ρg21π4D()22p2=c－bL－ρ2A2Q2+bQ+a－ρgz2－z122“3”“4”p3=bL3-4－ρ2A2Q2+ρgz4－z332、3、。2Q0=0．05m3/sH0=55mn0=2950r/mind=0．3m3a、。H=H0+bL1-4Q2H0=Δz+Δpρg。p2'=bL1-4－bL1-2－ρ2A2Q2+ρgH0－ρgz2－z14ΔpcΔpc=bcQ2p3'=bL1-4－bL1-3－bc－ρ2A2Q2+ρgH0－ρgz3－z15bc=ρkvc2。4、5、。85%3b。0．36MPa0．02m3/s。、1。684403、1Q↑Q↓p↓p↑p↑p↓p↑p↑p↓p↓2“3”———gz+pρ+u22=66。G1G2G1＜G2。u2。23。。1Q1Q2Cn1D。Q1n1C。Q1R1B。。。12Γt=－·Γ珖u+G－FF———G———G=p+ρgzΓ———Γ=ρu。L13ρLdudt=12ρu12－12ρu24+p1－p4+ρgz1－ρgz4－ΔpL+Δp－Δpc7ΔpL=FL。Δpc=bcQ28Δp=a+bQ+cQ29ΔpL=bLQ2107～10。7～10Q=0．045m3/sQkkvckQp47844．Qsks=2Δ珋pck0/珋kvc2bL珚Q－b+2c珚Q+2Δ珋pc/珚Q·1T1s+1Qsp4s=－12bL珚Q－b+2c珚Q+2Δ珋pc/珚Q·1T1s+1T1=ρL2Δ珋pc/珚Q－2c珚Q－2bL珚Q+bAsAs。1415Q=－Bn－Bn2－4ACn2+4AΔ槡p2CA=an02B=bn0C=c。QnQp4Qsns=BD+4AC珔n－B2珔n2C2bL珚Q－D·1T2s+1Qsp4's=－12bL珚Q－D·1T2s+1T2=ρLA2bL珚Q－DD=B珔n+2C珚Q。Qsks=0．000863．65s+1Qsp4s=－1．1×10－73．65s+1Qsns=0．001928．60s+1Qsp4's=－6．71×10－78．60s+110s26s。Matlab/SimHydraulic216。0．045m3/s0．050m3/s35s0．10MPa0．15MPa。4。。。。44Matlab/SimHydraulic。。1．M．2．2004240～242．2．J．2010817～19．3．J．20091618～11．4BortoniEDCAlmeidaRADVianaANC．Optimi-zationofParallelVariable-speed-drivenCentrifugalPumpsOperationJ．EnergyEfficiency200813167～173．5IrvineGGibsonIH．VFDrivesasFinalControlEle-mentsinthePetroleumIndustryJ．IndustryApplica-tionMagazine20028451～60．6FernandoJTEFongJACdeAlmeidaAT．Ecoanal-ysisofVariable-SpeedDrivesforFlowRegulationinPumpingSystemsJ．IEEETransactionsonIndustrialElectronics20115862117～2125．7CiontuMPopescuDMotocuM．AnalysisofEnergyEfficiencybyReplacingtheThrottleValvewithVaria-bleSpeedDriveCondensatePumpfromE．C．TurceniC．3rdInternationalSymposiumonElectricalandE-88440lectronicsEngineering．ISEEE2010293～2978．J．200725145～49．9．M．198933～35．10．J．20085971625～1630．11．M．3．200569～75．12．M．20055～13．13．J．2005257～59．14．J．2007291127～28．15．J．1999416334～338．16．Simulink/SimHydraulicsJ．201045631～34．ImpactofCentrifugalPumpVFConFlowControlPerformanceNIEJian-yingYUYangLUOXiong-linResearchInstituteofAutomationChinaUniversityofPetroleumBeijing102249ChinaAbstractIntheprocesscontrolboththrottlingregulationandvariable-frequencyregulationcanconstitutecentrifugalpump’sflowcontrolinfluidtransportsystem．Comparingitsvariable-frequencycontrolVFCwiththrottlingregulationshowsthatthethrottlingregulationasksformoreenergyconsumptiontogetherwithrelative-lysmallerdisturbedfluctuationandfasteradjustmentandthevariable-frequencycontrolencounterslowerdownstreampressurewhiletheflowgetslowerandthedynamicresponsetimeofvariable-frequencycontrolbe-comeslongerthanthatofthrottlingregulationwhiletheflow’ssetpointandthevesselpressurechangesudden-ly．DerivationandsimulationresultsshowthatVFChaslimitationinprocesscontrol．Keywordsflowregulationvariable-frequencycontrolthrottlingregulationcentrifugalpumpDCS。17177%89%DCS。。、、DCS20PID13315377%89%。17PID。。。。PIDPIDPID31。。DCS。9844．