化工原理课程(全英文)教学课件1

©2015YanweiWangBasicPrinciplesofChemicalEngineeringProcessesLecture1FallSemester,2014YanweiWang(王衍伟)Email:[e-mail]©2015YanweiWang2WhoamI?YanweiWang,AssociateProfessorOffice:911-408Phone:[phone]EducationbackgroundB.Sc.,ChemicalEngineering,ZhejiangUniversity,2003M.Sc.,PolymerEngineering,TechnicalUniversityofDenmark,2005Ph.D.,TechnicalUniversityofDenmark(DTU),2008Postdoc,DTU,2008-2010Postdoc,UniversityofMinnesota-TwinCities,2011ResearchInterestsPolymerPhysics,MolecularModeling,Micro-/nano-fluidicsystems©2015YanweiWang3Whoareyou?ThirdyearundergraduatesCoursestaken:–Calculus–Physics–Physicalchemistry–ChemicalReactionEngineering?–Thermodynamics?–…©2015YanweiWang4AboutthiscourseTextbookMcCabe,W.L.;Smith,J.C.;Harriott,P.UnitOperationsofChemicalEngineering,7thEdition,McGraw-Hill,2005(英文改编版，伍钦等改编，化学工业出版社,2007).©2015YanweiWang5Whatyouwilllearninthiscourse?1.Developanunderstandingoftheprocessesofmomentumtransfer(fluidmechanics),heattransfer,andmasstransfer.2.Beawareofthebasicequationsoffluidflow,heattransfer,andmasstransferandbeabletoapplytheseequationstopracticalunitoperations.3.Obtainapractical,workingknowledgeofcommonunitoperationsinchemicalengineeringsuchasevaporation,absorption/stripping,distillation,liquid-liquidextraction,anddrying.©2015YanweiWang6Grading1.Courseparticipationandhomeworkassignments:30%2.Mid-termExam:30%3.FinalExam:40%Total:100%Advice:Thisisahardcourse,soworkhardonit.©2015YanweiWang7OutlineofthislecturePages1-10oftextbookIntroductiontoChemEIntroductiontoUnitOperationsUnitsystems:SIunits&non-SIunitsConversionofunits©2015YanweiWang8ChemE?TurningmoleculesintoproductsChemistryfromlabtoindustrialprocessChemEisbothascienceandanart©2015YanweiWang9PrincipalfactoryoftheBASFgroup,Ludwigshafen(路德维希港)©2015YanweiWang10AqualifiedchemicalengineerMustdevelop,design,andengineerboththecompleteprocessandtheequipmentused;choosetheproperrawmaterials;operatetheplantsefficiently,safely,andeconomically;andseetoitthatproductsmeettherequirementssetbythecustomers.©2015YanweiWang11AqualifiedchemicalengineerTheprofessionalstatureofanengineerdependsonskillinutilizingallsourcesofinformationtoreachpracticalsolutionstoprocessingproblems.©2015YanweiWang12UnitOperations（1/6)Thevarietyofprocessesandindustriesthatcallfortheserviceofchemicalengineersisenormous.Becauseofthevarietyandcomplexityofmodernprocesses,itisnotpracticabletocovertheentiresubjectmatterofchemicalengineeringunderasinglehead.©2015YanweiWang13UnitOperations（2/6)AneconomicalmethodoforganizingmuchofthesubjectmatterofChemEisbasedontwofacts:①Althoughthenumberofindividualprocessesisgreat,eachonecanbebrokendownintoaseriesofsteps,calledoperations;eachoperationsinturnappearsinprocessafterprocess.②Theindividualoperationshavecommontechniquesandarebasedonthesamescientificprinciples.©2015YanweiWang14UnitOperations（3/6)ChemEunitoperationsconsistoffiveclasses:①Fluidflowprocesses:fluidstransportation,filtration,solidsfluidization②Heattransferprocesses:evaporation,condensation③Masstransferprocesses:gasabsorption,distillation,extraction,drying④Thermodynamicprocesses:gasliquefaction(液化),refrigeration（冷却）⑤Mechanicalprocesses:solidstransportation,crushing（破碎）andpulverization（粉碎）©2015YanweiWang15UnitOperations（4/6)Theunitoperationconceptisthis:Bystudyingsystematicallytheseoperationsthemselves---operationsthatclearlycrossindustryandprocesses---thetreatmentofallprocessesisunifiedandsimplified.©2015YanweiWang16UnitOperations（5/6)Unitoperationsarelargelyusedtoconducttheprimarilyphysicalstepsofpreparingthereactants,separatingandpurifyingtheproducts,recyclingunconvertedreactants,andcontrollingtheenergytransferintooroutofthechemicalreactor.Thestrictlychemicalaspectsofprocessingarestudiedinthesubjectcalled“ChemicalReactionEngineering”,whichtreatsreactionkineticsandreactors.©2015YanweiWang17UnitOperations（6/6)Becausetheunitoperationsareabranchofengineering,theyarebasedonbothscienceandexperience.Theoryandpracticemustbecombinedtoyielddesignsforequipmentthatcanbefabricated,assembled,operated,andmaintained.©2015YanweiWang18OutlineofthislecturePages1-10oftextbookIntroductiontoChemEIntroductiontoUnitOperationsUnitsystems:SIunits&non-SIunitsConversionofunits©2015YanweiWangPhysicalQuantitiesAnyphysicalquantityconsistsoftwoparts:aunitandanumber.Nophysicalquantityisdefineduntilboththenumberandtheunitaregiven.SoochowUniversity19©2015YanweiWangInternationalSystemofUnits(SI)Baseunit:kg(kilogram),m(metre),s(second),K(kelvin),mol(mole),A(ampere),cd(candela)Derivedunit:e.g.N=kg·m/s2Prefix:e.g.nm20Nationsthathaven’tofficiallyadoptedtheSI©2015YanweiWangThe7SIBaseUnits21!!ELECTRICCURRENTAMOUNTofSUBSTANCELUMINOUSINTENSITY©2015YanweiWangSIDerivedUnitsSomeexamples22NameSymbolQuantityExpressionintermsofSIbaseunitsHertzHzfrequencyNewtonNforcePascalPapressure,stressJouleJenergy,work,heatWattWpower,radiantfluxCoulombCelectricchargeVoltVvoltageOhmΩelectricalresistanceFaradFelectriccapacitance©2015YanweiWangSIDerivedUnits