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1、TheInfluenceofAgriculturalDataUncertaintyintheLifeCycleAssessmentofBiodegradableHydraulicLubricantsR.Ferret,G.MendozaandM.CastillaFoundationTekniker,ResearchandDevelopmentCenter,20600Eibar,SPAIN.Abstract:FromaLifeCycleAssessmentstudyofhydrauliclubricantsfromvegetableandmineraloil,itha
2、sbeenfoundthattheagriculturalstepinthebiodegradablehydrauliclubricantproductionhasthemainenvironmentalimpact.TheaimofthisstudyistodevelopanuncertaintyanalysisofagriculturaldatausedinthebiodegradablehydrauliclubricantinventoryfromthisLCAtodeterminetheinfluenceofdatauncertaintyintheenvi
3、ronmentalLCAresult.Twoparametershavebeenselectedfortheuncertaintyanalysis:fertilizationpracticesandmachineryoperations.Avariationparameteranalysishasbeencarriedoutobtainingthatassumptionsandsimplificationsmade(pre-treatmentsoiloperationsandfertilizationrates),whichclearlyinfluenceonth
4、edifferentimpactcategoriesstudied.AMonteCarloanalysishasbeenperformedshowingEutrificationPotentialcategoryisthemostaffectingbyinputdatauncertaintypropagation,whichmeansthefuelconsumptionandfertilizationratesinputdataneedtobeselectedfromamoreaccuracysource.Keywords:Uncertaintyanalysis,
5、LifeCycleInventory(LCI),dataquality,MonteCarlosimulation,agriculture,parametervariation.However,dataqualityfortheagriculturalproductionisoneofthemainsourcesof1.INTRODUCTIONuncertainty,speciallyregardingtheestablishmentofvaliddatasetsdescribingcropThousandsoftonsofoilaredischargedintop
6、roductioninaconsistentway,whichincludesnaturecausingimportantenvironmentalthechoiceofrepresentativeregionsaswellasproblemsandleadingtotheneedofalternativeadequatescenarios.lubricantproductswithminimalenvironmentalimpact.Tosupportthekeyenvironmentaldecisioninreplacingconventionalminera
7、llubricantswithonebasedonvegetableoil,acradle-to-graveLifeCycleAssessment(LCA)mustbeperformedfollowingthestagesofthebothprocesses,whichareshownintheFigure1.Theprocessforobtainingminerallubricantsisalreadyclearlydefinedandwell-known.Ontheotherhand,themanufacturingprocessofvegetableoilb
8、asedl
