Energy and exergy analysis of a steam power plant in Jordan .pdf

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1、AppliedThermalEngineering29(2009)324–328ContentslistsavailableatScienceDirectAppliedThermalEngineeringjournalhomepage:www.elsevier.com/locate/apthermengEnergyandexergyanalysisofasteampowerplantinJordanIsamH.Aljundi*ChemicalEngineeringDepartment,MutahUniversity,Al-Karak61710,Jordanarticleinfoabst

2、ractArticlehistory:Inthisstudy,theenergyandexergyanalysisofAl-HusseinpowerplantinJordanispresented.TheprimaryReceived14November2007objectivesofthispaperaretoanalyzethesystemcomponentsseparatelyandtoidentifyandquantifytheAccepted27February2008siteshavinglargestenergyandexergylosses.Inaddition,the

3、effectofvaryingthereferenceenvironmentAvailableonline4March2008stateonthisanalysiswillalsobepresented.Theperformanceoftheplantwasestimatedbyacomponent-wisemodelingandadetailedbreak-upofenergyandexergylossesfortheconsideredplanthasbeenpresented.Energylossesmainlyoccurredinthecondenserwhere134MWis

4、losttotheenvironmentKeywords:whileonly13MWwaslostfromtheboilersystem.ThepercentageratiooftheexergydestructiontoExergyanalysisthetotalexergydestructionwasfoundtobemaximumintheboilersystem(77%)followedbytheturbineExergyefficiencyDeadstate(13%),andthentheforceddraftfancondenser(9%).Inaddition,thecal

5、culatedthermalefficiencybasedonSteampowerplantthelowerheatingvalueoffuelwas26%whiletheexergyefficiencyofthepowercyclewas25%.Foramod-eratechangeinthereferenceenvironmentstatetemperature,nodrasticchangewasnoticedintheperfor-manceofmajorcomponentsandthemainconclusionremainedthesame;theboileristhemajo

6、rsourceofirreversibilitiesinthepowerplant.Chemicalreactionisthemostsignificantsourceofexergydestructioninaboilersystemwhichcanbereducedbypreheatingthecombustionairandreducingtheair–fuelratio.Ó2008ElsevierLtd.Allrightsreserved.1.Introductionexergyatdifferentpointsinaseriesofenergy-conversionsteps.

7、Withthisinformation,efficienciescanbeevaluated,andthepro-Jordan’senergymarketisoneofthecountry’sfastestdevelop-cessstepshavingthelargestlosses(i.e.,thegreatestmarginforingsectors.Annualdemandforelectricityhasincreasedbymoreim