XpheWorkshopWorkshopGoalPresentingcapabilitiesWorkingaseriesofexamplesLearnhowtouseXpheeffectivelybyScheduleMorningPlate-and-framegeometryProcessspecificationsAfternoonFluidpropertyspecificationsDesignandanalysismethodsProgramDescriptionXpheisacalculationengine/interfacecombinationthatcalculatesheattransferandpressuredropperformanceforplate-and-frameexchangers.OverviewModule1(Plate-and-FrameGeometry)ProgramcapabilitiesGraphicaluserinterfaceModule2(ProcessSpecifications)RatingandsimulationsPerformanceparametersOverviewModule3(FluidPropertySpecifications)GridpropertiesComponentbycomponentModule4(Designandanalysismethods)User-specifiedf-andj-curvesCondensationBoilingModule1Plate-and-FrameGeometryGeometrysupportedPlatetypes,passes,portarrangementGeometryinputPlatetypePlategroupPlateconfigurationPortconfigurationDesignmodeXpheGeometryPlate-and-frameconstructionRectangularplatewithfourportsOneortwoplatetypesyieldinguptothreeeffectivechevronanglesOne–sixhot/coldpassesXpheGeometryCocurrentorcountercurrentflowwithinapassU-orZ-flowforonepassUser-definedordatabankplategeometryIncrementationXpheAnalyzesexchangerbydividingitintomultiplesmallpiecesSolvesheattransferandpressuredropineachincrementusinglocalphysicalpropertiesOverallresultsintegrateincrementalresultsIncrementsAllowmoreaccuratecalculationsConsidereffectssuchasmaldistributionIncrementationEndPlates123456110RequiredInputRedoutlinesoninputfieldsindicaterequiredinputRedoutlinesaroundiconsindicaterequiredinputRedarrowsindicatesubordinatepanelcontainingrequiredinputPlateGeometryInternalplatedatabankUser-definedplatetypesInputmaximumsMaximumof12plategroups6hot/coldpasseseachwithonlyonechanneltype3hot/coldpasseseachwithtwochanneltypes2hot/coldpasseachwiththreechanneltypesPlateGeometryChevronangleVerticaldistancebetweenportsHorizontaldistancebetweenportsEffectiveheattransferareaPlateGeometryChevronangleandareaperplaterequired0.6mmthickness,bydefaultPortGeometryDataPortdiameterandvertical/horizontaldistancebetweenportsrequiredChannelwidthandeffectivelengthbasedonportdataPlateConfigurationFlowdiagrammatchesspecifiednumberofpassesandflowconfigurationPlateConfigurationPerpassNumberofchannelsperfluidperpass(Forunevenpassesthisnumberisforsmallernumberofpasses.)TotalTotalnumberofchannelsperfluidUserdefinedUser-specifiednumberofchannelsforeachplatesectionPlateConfigurationNumberofdifferentchanneltypesPlateConfigurationMixtureofplatetypesTotalchannelsforbothfluidsMultiplePlateTypesUseoneortwoplatetypestoformchannelFiveplatetypesmaximumforplatepackExample:withtwoplatetypes,3channeltypesavailable1/11/22/2SpecifyarrangementofplatesonPlateConfigurationpanelWhyUseMultiplePlates?Manufacturersproducefinitesetofplatetypes/chevronanglesHeattransferandpressuredropisfunctionofchevronangleEffectivechevronangleformixedplatetypesisaverageoftwochevronanglesUsercanbalanceheattransferandpressuredroprequirementsbymixingplatetypesMultiplePlatesExamplePlateType1(e.g.,30degree)PlateType2(e.g.,60degree)1/11/22/2EffectiveChevronAngle304560PortArrangementPortArrangementUsedrop-downmenutoswitchframe/pressureplatebetweenleftandrightdrawing.Noeffectoncalculations.PortArrangementTochangeportconfiguration,right-clickanyportlocationDesignSpecifiedexchangerdutyandprocessconditionsSomeelementsofexchangergeometryoptimizedtomeetdesignconstraintsRequireddutyMaximumpressuredropPortvelocityPlatetype(s)definedDesignAlgorithmTwodesignalgorithms/strategiesavailableSelectdesiredoptiononInputSummarypanelClassicDesignSpecifycaseasusualSelectClassicDesignRuncaseAlgorithmautomaticallyadjustsspecificgeometrytoachievedesireddutywithinpressuredropconstraintsNumberofchannels(plates)NumberoffluidpassesPackconfiguration(howmanychannelsofeachtype)GridDesignSpecifycaseasusualSelectGridDesignSelectgeometrytoconsideronDesignGeometrypanelGeometryparametersRangeofgeometryRuncaseGridofcasesisrunoverspecifiedrangeofvaluesDesignGeometryClickcheckboxtoenablevariationofitemindesignrunSelectdifferenttabstoaccessalldesigngeometryitemsDesignConstraintsDesignoptions(ClassicorGrid)willnotselectadesignthatviolatesconstraintsspecifiedonthispanel.DesignWarningsXpheflags(inDesignView)anycasethatviolatesconstraintsspecifiedonthispanel,butmaystillbeselectedforfinaldesignDesignViewProgramautomaticallyselectsbestdesign.Bestissmallestareawithacceptableoverdesignandnoconstraintviolations.Usermayalsoselectanyalternatedesign.Linesinredindicaterunsthatviolatedesignconstraint(C)ordesignwarning(W).Example1OilCoolerOpenExample1.htriTEMAAEUoilcooler¾-in.tubes10ftlongTEMAfoulingfactorsExample1DesignPlateFrameOilCoolerSelectFilemenu,NewPlateandFrameExchangerSelectWindowmenu,TileHorizontallyDrag-and-dropProcessHotfluidpropertiesColdfluidpropertiesExample1Single-PhaseDesignCreateplate-and-framedesignChangefoulingresistancesHotside0.00005Btu/hrft2°FColdside0.0005Btu/hrft2°FPositiveoverdesignrequired10psimaximumpressurehotandcoldsidesSuggestions:UseplatedatabankUsegriddesigntoapproximatedesignSessionViewSelectcaseandright-clicktodisplaycontextmenuUseEditmenu,ProgramSettingstoenable/disablelogrunsinsessionviewModule1SummaryandConclusionsXpheperformsdetailedincrementalcalculationsformostplate-and-framegeometriesDesignmodehelpsdevelopapproximatedesigns
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