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1、SAND2002-1879UnlimitedReleasePrintedJuly2002BladeSystemDesignStudiesVolumeI:CompositeTechnologiesforLargeWindTurbineBladesDaytonA.GriffinGlobalEnergyConcepts,LLC5729LakeviewDriveNE,#100Kirkland,Washington98109AbstractAspartoftheU.S.DepartmentofEnergy’sWi
2、ndPartnershipsforAdvancedComponentTechnologies(WindPACT)program,GlobalEnergyConceptsLLC(GEC)isperformingastudyconcerninginnovationsinmaterials,processesandstructuralconfigurationsforapplicationtowindturbinebladesinthemulti-megawattrange.Theprojectteamfor
3、thisworkincludesexpertsinallareasofwindturbinebladedesign,analysis,manufacture,andtesting.Constraintstocost-effectivescaling-upofthecurrentcommercialbladedesignsandmanufacturingmethodsareidentified,includingself-gravityloads,transportation,andenvironment
4、alconsiderations.Atrade-offstudyisperformedtoevaluatetheincrementalchangesinbladecost,weight,andstiffnessforawiderangeofcompositematerials,fabrictypes,andmanufacturingprocesses.Fiberglass/carbonfiberhybridbladesareidentifiedashavingapromisingcombinationo
5、fcost,weight,stiffnessandfatigueresistance.Vacuum-assistedresintransfermolding,resinfilminfusion,andpre-impregnatedmaterialsareidentifiedashavingbenefitsinreducedvolatileemissions,higherfibercontent,andimprovedlaminatequalityrelativetothebaselinewetlay-u
6、pprocess.Alternativestructuraldesignsareidentified,includingjointedconfigurationstofacilitatetransportation.Basedontheresultstodate,recommendationsaremadeforfurtherevaluationandtestingunderthisstudytoverifythepredictedmaterialandstructuralperformance.Ack
7、nowledgementsThisworkwascompletedforSandiaNationalLaboratoriesaspartoftheU.S.DepartmentofEnergy’sWindPACTprogram,underSandiaPurchaseOrderNo.13473.TheauthorwishestoacknowledgethecontributionsofSandiaTechnicalMonitorTomAshwill,PaulVeers,andotherSandiaperso
8、nneltothisproject.Thisprojecthasbenefitedfromextensivecollaborationwithmanufacturersofcompositematerials,windturbineblades,andothercompositestructures.JimSommerofMFGFiberglassprovidedvaluableinsightonblademanufacturingandc
