熟悉计量系统LNG课件

GetAcquaintedWithMeasurement熟悉计量系统,1,PPT学习交流,OverviewofMeteringSystem计量系统概述,1，MeteringSystemDesignPhilosophyAlltheFiscalMeteringStationsaredesignedfortherangeofgascompositionspecifiedandsizedtoaccommodatethemaximumgasdeliverycapacityofPhase-IandPhase-II.所有贸易计量站的气体组分范围和计量站规模都应满足一期和二期工程的最高输气量Allfiscalmeteringstationsaredesignedandconstructedtofiscal-meteringqualitywithanoverallerroroflessthan1%onmeteredenergyacrosstheflowranges,2,PPT学习交流,Continue,全部贸易计量站都是按照贸易计量等级设计和建设，整个流量范围内能量计量的总误差低于1%。PrimarymeasurementisattainedfrommeterrunsDanielSeniorsonicUSMandS600flowcomputer.FlowcomputerwillsendmeasurementdatatoGMSsystem.FlowconditioningfortheUSMisimprovedbyutilizingapipingconfigurationof5D+profiler+10Dupstreammetertubesand3Ddownstreammetertubes.基本计量值从计量管道的丹尼尔高级超声波气体流量计和S600流量计算机获得。流量计算机将计量数据送往GMS系统。利用5D+断面测量仪+10D上游流量计直管段和3D下游流量计直管段的管道配置对气体超声波流量计的流态进行了改善,3,PPT学习交流,Continue,Eachofthemeteringstationsarebasedona2x100%capacity（exceptforHKCG),withaprimarydutymeasurementstreamandsecondarystreamforuseasanonlinevalidationcheckmeterandinthecaseofprimaryfailureandinthecaseofprimaryfailure.Acrossoverlinecanlinkthetwostreamstogether(inseries)toenablegasflowthroughboththemeter-runsforverificationpurpose(exceptforterminalmeterstations).每个计量站以2x100%容量为基础，配有主计量通道和备用计量通道(HKCG除外），备用计量通道作,为在线验证校验仪，并在主用通道发生故障时启用。两条通道可以通过跨接管连接起来（串接),使气流同时通过两条计量管道（接收站计量站除外）.,4,PPT学习交流,Continue,Anon-lineGasChromatographDanalyser570isinstalledforgascompositionanalyses.一台在线色谱仪Danalyser570用于气体组分分析。On-linehydrogensulphideandtotalsulfuranalyzer;on-linewaterandhydrocarbondewpointanalyzer;on-linemoistureanalyzer,theyareusedforgasqualitymonitoring.(Atterminal)在线硫化氢和总硫分析仪;在线水露点和烃露点分析仪;在线水分分析仪,它们用于气体质量监控.(在接收站）,5,PPT学习交流,Atypicalmeteringstation典型计量站,RS485或脉冲接收工况流量,RS232/RS485色谱的分析数据,温度Llengthofacousticpath声道长度Vaveragefluidspeed流体流速;xdistanceofacousticpath声道距离,16,PPT学习交流,HowanUltrasonicFlowMeterWorks超声波工作原理,17,PPT学习交流,Stateoffluidflow流体流态,将流速简化为三个区域,ProAreaRepresentation,18,PPT学习交流,MultipathUSM多通道超声波流量计,Cross-sectionalviewofamultipathUSM有代表性的多通道流量计,Multipath多通道流量计,A,B,C,D,V,avg,=,S,W,n,V,n,n=1,4,V,n,=,L(t,1,-t,2,),2x(t,1,t,2,),2,19,PPT学习交流,Geometryweightfactor几何权重因子,W,a,=0.1382,W,b,=0.3618,W,c,=0.3618,W,d,=0.1382,Multipath多通道流量计,ChordA,ChordB,ChordC,ChordD,Geometryweightfactordependsonhowprobeisinstalled.权重因子仅取决于探头的几何分布情况!,20,PPT学习交流,Flowconditioners整流器,21,PPT学习交流,Continue续,Flowconditioningplatescanbeinstalledtoensurethataconsistentflowproenteringtheultrasonicmeter.,Profiler,Consistentflowprofile,Swirlflow,22,PPT学习交流,Flowrate流量,Flowratedependsonvelocityoffluidsandmeterrunsectionarea.流量取决于流体的流速和计量管截面积,流量=流速*截面积,Flowrate=velocityxmeterrunsectionarea,23,PPT学习交流,USMCommunication超声波流量计通讯,SerialModbusRS-485(2-wire)toflowcomputer.(flowvelocitydataDisplay;DisplayMatrix;ViewParameterReturntoMainMenu;ChangeValue;ChangeMode;Clear;ScientificNotation;Alarm;Print;DefaultDisplay;ProgramFunctionKeys;SecurityCode;,31,PPT学习交流,Flowcomputersecurity,Thesecuritysystemallowsupto50uniqueusers.安全系统最多支持50个不同用户Eachuserisallocatedtwoindividualpasswords;oneisnumericforaccesstotheS600andtheotherisalphanumericforaccesstotheConfig600suiteofprogramsortheWebServer.每个用户分配有两个密码；一个为数字密码，用于使用S600，另一个为字母数字型密码，用于使用Config600程序套件或网络服务器。Eachuserisallocatedasecuritylevelbetween0(highest)and9(lowest).每个用户还分配有一个在0（最高）到9（最低）之间的安全级别,32,PPT学习交流,Continue续,TheS600flowcomputerwillgenerateanalarmandswitchovertolastgoodvalueunderthefollowingconditions:S600流量计算机会在下列条件下产生报警，并切换到最后一次正常值：Incasetheun-normalizedtotalfromtheGCcontrollergoesbeyondthespecifiedlimits如果气相色谱仪控制器提供的未标准化的累积量值超过规定限值。IncasethereisafaultsignalfromtheGC(e.g.,carriergaslowpressureetc.)如果气相色谱仪有故障信号（例如，载气压力过低等）IncaseoffailureofcommunicationwithGC.如果与气相色谱仪的通信发生故障。,33,PPT学习交流,Flowcomputeroperationmode流量计算机操作模式,ModeOfOperation操作模式Measuredvalue:测量值Keypadvalue:键盘键入值Kaypad-Fvalue键盘键入与自动值MaintenanceMode维修模式,34,PPT学习交流,GCdatatoflowcomputer进入流量计算机的数据,ThefollowingdatawillbereadfromtheGCcontroller:如下数据将会从色谱仪控制器读取Nitrogen(N2)氮气(N2)CarbonDioxide(CO2)二氧化碳(CO2)Methane(C1)甲烷(C1)Ethane(C2)乙烷(C2)Propane(C3)丙烷(C3)i-Butane(iC4)异丁烷(iC4)n-Butane(nC4)正丁烷(nC4)i-Pentane(iC5)异戊烷(iC5)n-Pentane(nC5)正戊烷(nC5)Hexane(C6+)己烷(C6+),35,PPT学习交流,Flowcomputercomputation流量计算机计算,ConvertUSMmeasuredgasvelocityVeltoon-lineconditionflowrate.Temperatureandpressurecorrectedvolumetricflowrateofthegasthroughthespool.(m3/hour)流经计量管道经过压力温度校正的体积流量Measuredvelocityflowratewithinthespool(m/s)；计量管道内测得的流速Calibratedinternaldiameterofthespoolbody校正过的计量管内径,36,PPT学习交流,Continue续,Correctionfactorfortheeffectsofpressureonthespool；计量管压力影响校正系数Correctionfactorfortheeffectsoftemperatureonthespool；计量管温度影响校正系数MeterFactorcorrectionbasedonflowrate基于流速的计量校正系数VelocitycorrectionforReynoldsnumber.(OnlyrequiredonJuniorSonicmeters).ForSeniorsonicmeters,asinthisproject,CFact=1.雷诺数速度校正系数（仅限低级超声流量计），对高级超声流量计，象DPLNG项目，CFact=1。Where：,37,PPT学习交流,Continue续,Where：,38,PPT学习交流,Standardvolumeflowrate工程设计控制Internationalindustryrecognizablestandard;国际通用工业标准Contractspecification;合同说明Dailyoperation.每天例行操作Guaranteegasmeasurementaccuracy,56,PPT学习交流,EngineeringDesignControl,Metertubedownstreamandupstreamminimumlengthrequirements,(AGA9);计量管上下游长度最低要求。Metertubeupstreamvalveinstallationrequirements,(AGA9);计量管上游阀门安装要求Meterruninstallationrequirements,(AGA9);计量管安装要求。Instrumentsinstallationrequirements,etc.(AGA9).计量仪表安装要求等,57,PPT学习交流,MeteringSystemOperatingControl,Astandardprogramtoverifytheflowcomputercalculation;一标准程序核实流量计算机Testequipmentsperiodicallyverifiedandre-certificated.测试设备周期送检。Periodicmeterstationinspectionandcalibration;计量站周期检查及校正Dailyflowcomputerreports.流量计算机每天报告Companyinternalandexternalaudit.公司内外审计GCautomaticcalibration.GC自动校正Meteringsystemannualverificationandrecertification.计量系统年度核实及证书,58,PPT学习交流,InternationalIndustryRecognizableStandard,59,PPT学习交流,Continue续,60,PPT学习交流,GasQualityControl,Pressuredeliverysystem.压力系统Temperaturedeliverysystem.温度系统Properoperatingtheabovesystemsarevitaltothesalesgasquality.正确操作上述系统对气体质量很重要。Moistureanalyzer，水分分析仪H2Sandtotalsulphuranalyzer.H2S及总硫分析仪Hydrocarbondewpointanalyzer.炭氢化合物烃露点分析仪On-lineGC.在线色谱仪分析仪Off-lineGC。离线色谱分析仪。ALNGcargotransferdatasheet.LNG货物交接物料单。,61,PPT学习交流,GasQualityMonitorandSettlement气体质量监测及解决,On-lineandoff-linegaschromatograph,mainlyforgascomponentsanalysisandBTUcalculation;在线离线色谱仪用于组分及热值计算。On-linedewpointanalyzer,mainlyforgasheavycomponentsmonitoring;在线烃露点分析仪用于监测气体重组分。Salesgassampleanalysis,itisimplementedbythirdparty.Theanalysiswillbeusedforcheckingon-lineGC.销售气样分析，由第三方完成，结果用于检查在线色谱仪。ALNGcargotransferdatasheet.澳大利亚LNG交货单,62,PPT学习交流,QualityControlofThirdParty对第三方的质量监控,Thisisdonetomakesurethatthethirdpartysanalysisreportarecorrectandaccurate.这主要是确保第三方的分析报告是正确及满足精度要求的。Qualifiedthirdparty,(possessaccreditedcertificate);合格的第三方（拥有资质证书）DPLNGperiodicallyaudit,(Interna