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1、毕业设计（论文）外文翻译毕业设计（论文）题目：甲烷化水冷器设计外文题目：MethanationWaterCoolers译文题目：甲烷化水冷器学院：化工装备学院专业班级：过程装备与控制工程0902学生姓名：魏冰指导教师：张雅新年月日指导教师评阅意见指导教师签字：年月日MethanationWaterCoolersHeatexchangersaremechanicaldevicesdesignedfortheproficienttransferofheatfromonefluidmattertoanotherviaasolidsurface.Itisimportanttonotethatthefl
2、uidsthemselvesnevermixbutinsteadareseparatedbythesolidsurface.Thisprocesshasfoundwideapplicationintheengineeringworld,butalsoineverydayhouseholdusessuchasairconditioningandrefrigeration.Probablythemostwellknownheatexchangingdeviceisacar’sradiator.Otherexamplesincludeintercoolers,boilers,condensers,a
3、ndalsopre-heaters.heatexchangers,includingaprocessofconvectionandconductiontofunction.Inordertoproperlymeasuretheoperationofheatexchangers,boththeefficiencyaswellasthesizemustbetakenintoaccount.Efficiencyismostoftenratedbythemeasurementoftheactualtemperaturechangethatbothfluidsexperience,aswellasthe
4、dropinpressuretheheatexchangerevidences.Thesizeoftheheatexchangerisdeterminedbytherequiredtemperaturechangeforecasted,thespeedatwhichthischangeistobeaccomplished,aswellastheallowablepressuredrop.Alackofefficiencymaypointtoimproperoperationofthedevice,whileasuddendropinefficiencyisaclearsignofmateria
5、lfailureorinput/outputstrain.Othertroubleshootingstepsshouldincludeproperremovalofchemicalbuildups.HeatExchangersfallintoanumberofcategories,nameparallel-flow,counter-flow,andcross-flow.Theseclassificationspertaintotheflowdefinition,ieaparallel-flowheatexchangerallowsthefluidstoenterthedeviceatthesa
6、meendandtravelthroughitinparallelmode,exitingattheoppositeend.Counter-flowdevicesforcethefluidstoenteratoppositeendsandalsoexitoppositefromoneanother.Cross-flowexchangers,ontheotherhand,havethefluidstravelingatrightanglestooneanotherthroughthedevice.一、MethanationAmethanationreactorcomprisinganouterm
7、etalcasinghavingaremovablelidmountedtothetopportionofsaidcasing,saidlidhavinganapertureextendingtherethroughforintroducinggasestobereactedintotheoutercasing,aninnercasinghavingcovermeansandpositionedw
