1996 design and off-design performance of advanced mixed gas stream cycle power plants

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1、DESIGNANDOFF-DESIGNPERFORMANCEOFADVANCEDMIXEDGAS-STEAMCYCLEPOWERPLANTSSergioCamporealeDept.ofMechanicsofFluidsandOffshoreEngineering,UniversityofReggioCalabria,viaE.Cuzzocrea,48ReggioCalabria,89128ItalyTel.39-965-875234-Fax.39-965-875201Bernard0FortunatolstitutodiMacchineedEn

2、ergetica,PolitecnicodiBariviaReDavid200,Bari70125ItalyTel.39-80-5460223-Fax.39-80-5460411ABSTRACTIntheclassofenginesupto50MWanewenginespecificallyMixedgas-steamcyclehavebeenproposedtoincreaseefficiencydesignedforanenhancedcycledoesnotappeareconomicallyandspecificworkofgasturb

3、ineengines.feasible.TheenhancedcyclehastobeoriginatingfromabaseThesecyclesallowtorecoverexhaustheatforre-usewithintheenginewithalimitednumberofmodifications.Thereforethegasturbineplantandareanattractivealternativetocombinedresultsofthethermodynamicanalysiscannotbeusedasstarti

4、ngcyclesforsmallandmiddlerangeindustrialpowerplants.pointtothedesignbutamethodologyofoptimisationofthebaseThermodynamicstudiesaboutthecombineduseofwaterengineistobestated.Inthepresentpaperthefollowinginjection,steaminjection,recuperation,intercoolingandmodificationsareconside

5、red:aftercoolinghaveshowntoofferthepotentialtoefficiencyand-theinsertionofheatexchangerormixerbetweenithespecificpowerimprovement.compressoroutletandthecombustorinlet;Theaimofthisworkistoinvestigateaboutplantsobtainedby-injectionofwaterorsteamalongthegascycle;theup-gradingofa

6、simplecycleaeroderivativegasturbine-modificationofturbinevanestoaccommodatetothelargerenginewithadditionaldevicesandalimitednumberofflowrates;modificationsofthebaseengine.-modificationorsubstitutionofthepowerturbineinordertoThefollowingplantconfigurationsareconsideredandcompa

7、red:makeitabletousethelargerexpansionpressureratio.-recuperativewaterinjectedgasturbine(RWI)withaftercoolingIntercooling,thatisapossiblemodificationwhenthecompressorandeconomisertopreheatthewatertobeinjected;issplittedintwoparts,isnotconsideredinthiswork.-steaminjectedgasturb

8、ine(STIG).Inthepapertheprocedureofthedevicesdesignfortheenhancedcycl