600mw级火电厂热力系统优化与（火用）分析-(7320)

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1、600MW级火电厂热力系统优化与(火用)分析ABSTRACTInrecentyears,Thelarge-scaleandsustaineddusthazeappearedinourcountryfrequently,ManycitiesincludingBeiJinghaverecorded"hazardous"levelsofpollution(AirQualityIndexexceeded500micrograms,thehighestlevel,Anythingabovethisisregardedas“beyondindex”).which

2、hasatorturinginfluenceonpeople'shealthandpsychologicalhealth.Atthesametime,Countryisbecomingmoreandmoreconcernedaboutenvironmentalissues.Tocompletetheenergy-savingandemissionreductiontask,can'tdowithoutoptimizingandimprovementofthethermodynamicsystemofthepowerplants,whicharelar

3、gepolluters.Inthispaper,Taking600MWsubcriticalunitofTaishanpowerplantastheresearchobjectandmodeled,Derivedanimprovedmatrixmethodbasedonthetraditionalheatbalancemethod,Andwritedtheuniversalsoftwareofpowerplants.Thesoftwareintegratetwokindsoflanguagefeatures,Matlabwhichhasastrong

4、dataprocessingabilityandVisualBasicwhichisveryconvenientanduser-friendly,Soitmadetheresultsmoreaccurateandtheoperationmoresimple.Nextanalysedthetheinfluencesofterminaltemperaturedifferenceandresistanceofductinginthesystem.Pointedoutthevulnerabilitiesinthesystem.Carriedoutquanti

5、tativeandqualitativeanalysisesoftheheatregenerativesystemwithconsultingtheactualdataofmultiplepowerplantsinourcountry.designedaprogramofsimplexmethodwhichsteplengthcanberegulatedintheMatlab.improvedefficiencyofsteamturbineby1.89%bymeansofiteration.Introducedtheconceptofexergyin

6、thefourthchapter.Analyzedeveryexistingformandcomputationalmethodoftheexergy.Gottheamountofallkindsofexergylossintheboilerandthetheexergyloss,theexergyefficiencyofregenerativeheaterandsoon.Foundoutthedistributionofdifferentkindsofexergylossinthepowerplant.Finally，Accordingtother

7、ecoverymodeofthecylinderleakandtheshaft-packingleakage,andtheoriginofdesuperheatingwaterfortheboiler.Structureimprovementsareputforward.Determinethemostreasonableschemethroughthepartialquantitativeanalysis,whichimprovedtheefficiencyofthermalsystemfurther.Itcanprovidereferencefo

8、rtheenergy-savingandemission-reductionofthesametypeofp