HTRI_2005年成都年会-板式换热器培训班资料_Xphe1.ppt

XpheWorkshop,WorkshopGoal,PresentingcapabilitiesWorkingaseriesofexamples,LearnhowtouseXpheeffectivelyby,Schedule,MorningPlate-and-framegeometryProcessspecificationsAfternoonFluidpropertyspecificationsDesignandanalysismethods,ProgramDescription,Xpheisacalculationengine/interfacecombinationthatcalculatesheattransferandpressuredropperformanceforplate-and-frameexchangers.,Overview,Module1(Plate-and-FrameGeometry)ProgramcapabilitiesGraphicaluserinterfaceModule2(ProcessSpecifications)RatingandsimulationsPerformanceparameters,Overview,Module3(FluidPropertySpecifications)GridpropertiesComponentbycomponentModule4(Designandanalysismethods)User-specifiedf-andj-curvesCondensationBoiling,Module1Plate-and-FrameGeometry,GeometrysupportedPlatetypes,passes,portarrangementGeometryinputPlatetypePlategroupPlateconfigurationPortconfigurationDesignmode,XpheGeometry,Plate-and-frameconstructionRectangularplatewithfourportsOneortwoplatetypesyieldinguptothreeeffectivechevronanglesOnesixhot/coldpasses,XpheGeometry,CocurrentorcountercurrentflowwithinapassU-orZ-flowforonepassUser-definedordatabankplategeometry,Incrementation,XpheAnalyzesexchangerbydividingitintomultiplesmallpiecesSolvesheattransferandpressuredropineachincrementusinglocalphysicalpropertiesOverallresultsintegrateincrementalresultsIncrementsAllowmoreaccuratecalculationsConsidereffectssuchasmaldistribution,Incrementation,EndPlates,1,2,3,4,5,6,1,10,RequiredInput,Redoutlinesoninputfieldsindicaterequiredinput,Redoutlinesaroundiconsindicaterequiredinput,Redarrowsindicatesubordinatepanelcontainingrequiredinput,PlateGeometry,InternalplatedatabankUser-definedplatetypesInputmaximumsMaximumof12plategroups6hot/coldpasseseachwithonlyonechanneltype3hot/coldpasseseachwithtwochanneltypes2hot/coldpasseachwiththreechanneltypes,PlateGeometry,Chevronangle,Verticaldistancebetweenports,Horizontaldistancebetweenports,Effectiveheattransferarea,PlateGeometry,Chevronangleandareaperplaterequired,0.6mmthickness,bydefault,PortGeometryData,Portdiameterandvertical/horizontaldistancebetweenportsrequired,Channelwidthandeffectivelengthbasedonportdata,PlateConfiguration,Flowdiagrammatchesspecifiednumberofpassesandflowconfiguration,PlateConfiguration,PerpassNumberofchannelsperfluidperpass(Forunevenpassesthisnumberisforsmallernumberofpasses.)TotalTotalnumberofchannelsperfluidUserdefinedUser-specifiednumberofchannelsforeachplatesection,PlateConfiguration,Numberofdifferentchanneltypes,PlateConfiguration,Mixtureofplatetypes,Totalchannelsforbothfluids,MultiplePlateTypes,UseoneortwoplatetypestoformchannelFiveplatetypesmaximumforplatepackExample:withtwoplatetypes,3channeltypesavailable1/11/22/2SpecifyarrangementofplatesonPlateConfigurationpanel,WhyUseMultiplePlates?,Manufacturersproducefinitesetofplatetypes/chevronanglesHeattransferandpressuredropisfunctionofchevronangleEffectivechevronangleformixedplatetypesisaverageoftwochevronanglesUsercanbalanceheattransferandpressuredroprequirementsbymixingplatetypes,MultiplePlatesExample,PlateType1(e.g.,30degree),PlateType2(e.g.,60degree),1/1,1/2,2/2,EffectiveChevronAngle,30,45,60,PortArrangement,PortArrangement,Usedrop-downmenutoswitchframe/pressureplatebetweenleftandrightdrawing.Noeffectoncalculations.,PortArrangement,Tochangeportconfiguration,right-clickanyportlocation,Design,SpecifiedexchangerdutyandprocessconditionsSomeelementsofexchangergeometryoptimizedtomeetdesignconstraintsRequireddutyMaximumpressuredropPortvelocityPlatetype(s)defined,DesignAlgorithm,Twodesignalgorithms/strategiesavailableSelectdesiredoptiononInputSummarypanel,ClassicDesign,SpecifycaseasusualSelectClassicDesignRuncaseAlgorithmautomaticallyadjustsspecificgeometrytoachievedesireddutywithinpressuredropconstraintsNumberofchannels(plates)NumberoffluidpassesPackconfiguration(howmanychannelsofeachtype),GridDesign,SpecifycaseasusualSelectGridDesignSelectgeometrytoconsideronDesignGeometrypanelGeometryparametersRangeofgeometryRuncaseGridofcasesisrunoverspecifiedrangeofvalues,DesignGeometry,Clickcheckboxtoenablevariationofitemindesignrun,Selectdifferenttabstoaccessalldesigngeometryitems,DesignConstraints,Designoptions(ClassicorGrid)willnotselectadesignthatviolatesconstraintsspecifiedonthispanel.,DesignWarnings,Xpheflags(inDesignView)anycasethatviolatesconstraintsspecifiedonthispanel,butmaystillbeselectedforfinaldesign,DesignView,Programautomaticallyselectsbestdesign.Bestissmallestareawithacceptableoverdesignandnoconstraintviolations.Usermayalsoselectanyalternatedesign.,Linesinredindicaterunsthatviolatedesignconstraint(C)ordesignwarning(W).,Example1OilCooler,OpenExample1.htriTEMAAEUoilcooler-in.tubes10ftlongTEMAfoulingfactors,Example1DesignPlateFrameOilCooler,SelectFilemenu,NewPlateandFrameExchangerSelectWindowmenu,TileHorizontallyDrag-and-dropProcessHotfluidpropertiesColdfluidproperties,Example1Single-PhaseDesign,Createplate-and-framedesignChangefoulingresistancesHotside0.00005Btu/hrft2FColdside0.0005Btu/hrft2FPositiveoverdesignrequired10psimaximumpressurehotandcoldsides,Suggestions:UseplatedatabankUsegriddesigntoapproximatedesign,Se