冷机群控系统设计

上海交通大学硕士学位论文冷机群控系统设计姓名：荣剑文申请学位级别：硕士专业：控制工程指导教师：顾战松;江宏纶20080201DESIGNOFCHILLERPLANTCONTROLSYSTEMABSTRACTEnergyofChinalacksseriouslyandisconsumedhighly.Particularlyairconditioningconsumesmostofenergy.Forthesakeoftherunningefficiencyofchiller,convenientoperation,improvingcomfortablequalityofairconditioning,ChillerPlantControlSystemisrecognizedandappliedmoreandmorebycustomer.Thisarticledoessomeintroductioninthedomesticandinternationalapplicationbackgroundandeffecttothissystem.Thedifferentairconditioningwatersystemhasdifferentcontrolstrategy.Thisarticleintroducesatypeofmostcommonairconditioningwatersystem.Readercanunderstandwhichfacilityshouldbeconfiguredinairconditioningwatersystemofbuilding.Readercanalsounderstandtheworkprincipiumofwaterpipesystem.Thethesisintroducesdefinition,function,characteristics,functionandthecontrolobjectofChillerPlantControlSystemlater.Thearticleanalyzestheworkprincipiumandmethodofsavingenergytoallkindsofcontrolledobjects.Somescientificcontrolstrategiesfordifferentcontrolledequipmentsaresubmitted.ThenthisarticledescribesarealChillerPlantControlprojectdesignindetail.Firstlythethesisintroducesthehardwaredesignofthisproject:1.Airconditioningwatersystem;2.Controlgoal,objectandtotalpointlist;3.DirectDigitalControllerIntroduction;4.DistributethesepointstoeachDDC;5.Controlnetworkprotocol;6.Listofcontrolproductsandintroductionofcontrolproducts.Thenthisarticledescribesthesoftwaredesignofthisproject:1.StructureofChillerPlantControlSystem&Controlflowchartofouterassistantequipmentsofchiller;2.Controlprogramdesignofallkindsofcontrolledequipments.ControlsoftwaredesignsforchillerinthisprojecthaveChillerlead/lagconditionandflowchart;Parameterexplanationofchillerlead/lagcontrol;Designofchillersrotationcontrol.Someprogramstocontrolchilledwaterpumpsandcoolingwaterpumpsincluderotationandstandbycontrol.Theseprogramscanbereferenced.Thisarticledescribestheseprogramsindetail.Thefunctionofelectricheatingforfreezingprotectioninthedesignofcoolingtowercontrolcanbechosenatfutureprojectdesign.Rotationprogramstocontrolcoolingtowercanbereferencedalso.Thereisaspecialfunctioninthedesignofheatingexchangemachinecontrol:utilizinglowertemperaturecoolingwaterexchangescoolcapacitytochilledwaterinwinter.Utilizingthenetworkcommunicationcanmonitortheinternalparameterofeachchiller,savingagreatdealofsignalcables.Atthesametimealltypesofstatussignalsorsetpointscanbesenttomonitorcomputerbycontrolnetwork.Alldataandflowchatscanbedisplayedgraphicallyinthecomputer.ItwillbeconvenientverymuchtooperateormanageChillerPlantControlSystemdaily.Soitismuchimportanttoinsurethecommunicationofcontrolsystemnetwork.Atlastchapterofthisarticleanalyzedthecommunicationproblemthatevenhappenedinthisproject.Accordingtoresearchandcommission,thethesissubmitsasolution.Theprocessofresearchcanbereferenced.SavingenergyisoneofthegoalsthatdesignChillerPlantControlSystem.Attheendofdesignandcommissionpeopleshouldanalyzeandcompareenergyconsuming.ThisarticleanalyzesandcalculatesthesavingenergyratethatbringstocustomeraftertheyapplyChillerPlantControlSystemaccordingtoautomaticdatarecordbycontroller.ThethesissummarizesthepurposewithdesignofChillerPlantControlSystemfinally.KEYWORDSChillerPlantControlSystemCOP(CoefficientOfPerformance)AdditionalCooling/ReducedCoolingCapacityNetworkCommunicationSaveEnergyFig.1-1CCNnetworkprotocolFig.1-2ICSnetworkprotocolFig.1-3ISNcontrollerFig.2-1airconditionwatersystemlllllllllllFig.2-2Compressorcomponentsofcentrifugalchiller0t0Pn0QktkP0tn0~QPkeN0~Q0~QFig.2-3CharacteristicgraphofcompressorFig.2-4Runningprincipleofcompressorwhencondenserpressureisup.Fig.2-5runningprincipleofcompressorwhenevaporatorpressureisdown.’Fig.2-6Start/stopflowbetweenpumpandvalveFig.2-7Characteristicgraphofcentrifugalwaterpump)(2QfP=)(3Qf=η)(2QfP=)(1QfH=Fig.2-8CoolingwatertowercomponentsllFig.2-9No.1watersystemFig.2-10No.2watersystemFig.2-11No.3watersystemFig.2-12No.4watersystemFig.2-13No.5watersystemll“”65000[10]Fig.3-1Airconditionwatersystem+464264271llllllTable3-1Tableoftotalpoints(DirectDigitalController)DDC(AI)(DI)(AO)(DO)DDCDDCDDCBACnetLontalkModbusDDCDDCDDCDDCDDC/DDCTCP/IPDDCInternetDDCDDCDDCDDC345100245DDC16718564DDCDDCDDCDDC11DDCDDCDDC41DDCTable3-2tableofcontrollerdistributionlllllllllDDC4DDCDDCDDCTable3-3TableofcontrollerpanelCP-ACP-DCP-MCP-FCP-S4DDCFig.3-2Networkprotocol020RS4859600b/sBelden8772(3AWG20)GatewayBridgeEthernetIPGatewayBridgeSwitch10Mb/s5UTP10Base-TDDCTable3-4ControlcomponentslistlChillervisorSystemManagerIIIlDataCollectionIVlDataLinklDDC/EthernetConverterlComfortVIEWSoftwarelTemperatureSensor&OutsideTemp/HumiditySensorlControlPanellMonitorComputer3llnFig.4-1Processofsignalcollection&controlCSMFig.4-2PartoneofcontrolflowFig.4-3Parttwoofcontrolflowllllll3-2DDC-1DDC-2DDC-1lllllllllllllllFig.4-4AdditionalcoolingrequiredofchillerFig.4-5ReducedcoolingrequiredofchillerFig.4-6Additional/reducedcoolingrequiredmonitorofchillerll””vl””lll””vl””lTable4-1AdditionalcoolingsequenceTable4-2Reducedcoolingsequencellllllll……………………………………llllFig.4-7Maininterfaceof