Energy Efficiency Hierarchy Evaluation based on DE

1、EnergyEfficiencyHierarchyEvaluationbasedonDEAanditsapplicationinEthyleneProductionProcessZhiqiangGeng†,YongmingHan†,JiqinZhu‡†CollegeofInformationScienceandTechnology,BeijingUniversityofChemicalTechnology,Beijing100029,China‡StateKeyLaboratoryofChemicalResourceEngineering,BeijingUniversityofChemicalTechnology,Beijing100029,ChinaAbstract:Dataenvelopmentanalysis(DEA)hasbeenwidelyusedintheenergyefficiencyanalysisofenterprisedevice,buttoomuchdecision-makingunitsofDEAmodelareeasytocausethatmoredeci。

2、sion-makingunits’efficiencyvalueare1,aswellascannotdistinguishtheprosandconsoftheeffectivedecision-makingunits.ThispaperproposesaDEAintegratedanalytichierarchyprocessmode(AHP)methodtoovercomeshortcomingsmentionedabove,whichnotonlyisabletosolvetheproblemoftoomucheffectivedecision-makingunit,andalsobeabletomoreeffectivelyreflectthedecision-makinguniteffectivenessamongthedifferentlevels.Thesmallnumberofdecision-makingunitsisanalyzedusingDEAmodel,andthemulti-levelintegrationofDEAefficiencyvalueswere。

3、disposedusingAHPmethod.Themethodisappliedtotheenergyefficiencyanalysisofethyleneproductionprocessbasedonanalysismonth,yearanditsindustry-levelofethyleneplantunderdifferenttechniquesanddifferentscales.Itcanguidetheethyleneproductionsystemtoreducetheenergyconsumptionandimproveenergyefficiencies.Keywords:ethyleneproductionprocess;energyefficiency;dataenvelopmentanalysis;analyticTowhomcorrespondenceshouldbeaddressed:E-mail:[e-mail]@mail.buct.edu.cn,Tel:[phone],F。

4、ax:[phone]hierarchyprocess1.IntroductionBeingtheleadingofpetroleumchemicalindustry,theethyleneproductionleveloftenservesasoneofthemainsignalstojudgetheindustrydevelopmentlevelofacountry.Inrecentyears,energyconservationandemissionreductionisoneofthetoptopicsfocusedonbyallcountriesintheworld.Energy-savinghasbeenapoliticallawtobewritteninnationaldevelopingstrategyinmostcountries.In2008,accordingtostatistics,theethyleneproductioncapacityofSinopecCorporationis6359.4Ktandtheethyleneplantenergy。

5、consumptionis649.36Kg/tstandardoil1.Similarly,thoseofPetroChinaCompanyLimitedare2676Ktand714Kg/tstandardoil,respectively2.Theirenergyconsumptionisfarlowerthanthatoftheadvancedlevelabroad,whichmeansthatethyleneindustryinChinahasgreatimprovementspaceforenergyefficiency.Theenergyconsumptioncosttookupmorethanhalfoftheoperationcostinethyleneproductionequipment3.Thus,researchesaboutitsenergyefficiencyevaluationhavegreateconomybenefits.Currently,enterprisecommonlyusesthemeanmethodandoptimalindexmethodt。

6、oanalyzeenergyefficiency4.Sinceenergyefficiencyvaluecontainsbothindicatorsandinfluencingfactors,thevalueofvariousfactorshasdifferentmeaningtoenergyefficiencyindicators,andthemeanmethodandoptimalindexmethodconnotintroduceenergy-savingknowledgeintoenergyefficiencyanalysis,whichcannotbegiventoenergyefficiencybenchmarkofvariousfactorsandexcellentindicatorstoguidetheactualstateofenergyefficiencyanalysis.Gengetc.proposedtheenergyconsumptionanalysismethodofethyleneplantbasedondatafusion,obtainedabetter。

7、effect,butdidnotconsidertheimpactfactorsofenergyconsumptionindicators5,6.InallusiontodisadvantagesofexistedenergyefficiencyevaluationofethyleneindustryinChina,thepaperspecificallyproposesthemethodcombiningdataenvelopmentanalysis(DEA)withanalytichierarchyprocess(AHP)toevaluateenergyefficiencyofethyleneproductsystemIn1978,thefamousoperationresearchersA.Charnes,W.W.CooperandE.RhodeshavefirstlyproposedDEA.Theyusedthismethodtomake‘productionapartment’,whichhadmultipleinputs,especiallymultipleoutputs,。

8、both‘sizeableeffective’and‘technologicaleffective’.Thisapplicationturnedouttobemuchsatisfactoryandeffective7.AHP(analytichierarchicprocessmode),whichcombinesqualitativewithquantitativeanalysis,isahierarchicalandmulti-criterionanalyticmethod8-11.Itmeetswiththerequirementofmultiplesolutionsfusionundermultiplecriteriaofhierarchicalmodeofenergyefficiencyvalue.Wuetc.researchedonEvaluationModelofEnergyEfficiencyBasedonDEA12.JablonskyandJosefstudiedontwooriginalmodelsforrankingofefficientunitsinDEA-the。

9、yarebasedonmultiplecriteriadecisionmakingtechniques-goalprogrammingandAHP13.YanandCuigavearelativelyreasonablesequencingmethodforaclassofmultifactorsequencingproblembycombiningAHPwithDEA14.Ehsanetc.studiedenergyconsumptionefficiencyforcornproductionutilizingDEAandAHPtechniques15.Diegoetc.proposedalogisticsproviderevaluationandselectionmethodologybasedonAHP,DEAandlinearprogrammingintegration16.TheauthorstudiedrespectivelyusingthemodelofDEAandAHPtoevaluateenergyefficiencyofethyleneproductsystem17,。

10、18.First,thepaperusesDEAtoanalysisefficiencyvalueofthemonthdatafordifferentdevicesunderthesametechnologyinacertainyear,andobtainstheenergyefficiencyoftheethyleneproductionequipmentatthesametimefindstheimprovementdirectionofthenon-effectivedecision-makingunits.ThenthemonthlydataofethyleneproductionenergyefficiencyfromthesametechnologywasweightedfusedbyAHP.Finally,theyeardataofethyleneindustryandenergyefficiencydatafromdifferenttechnologieswereevaluatedtheirrelativeeffectivenessbyDEA.Thismethodisus。