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Modelarea Fermelor de Turbine Eoliene

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    ModelareaFermelordeTurbineEoliene

    MihaelaPopescu&JonSamsethSINTEFNorway

    Diasporan Cercetarea tiinific i nvmntul SuperiordinRomnia Diasporai prietenii si,2016

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    Emisiazerodepoluantisau/igazecuefectdeser.

    Nuseproducdeeuri. Prezentalorestenecesarainzonele izolate. Prezenta turbineloreolienenepoate

    asigura confort incazulcrizeienergiei.

    2

    DeCe Turbine Eoliene?

    https://www.wpclipart.com/energy/wind_turbine_color.png.html

    http://sesiondecontrol.com/sociedad/medioambiente/elmapadelaenergiaeolica/

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    Istorie

    http://www.kenergywind.com/uat2/wind_technology/history.html

    Asia:Primeleatestaridocumentaresuntinjurulanului1700ICinMesopotamia.RegeleHammurabifoloseaputereavantuluisairigeMesopotamia

    Europa:primaatestareaturbineloreolieneinEuropa:KtesibiosdeAlexandria 225222IC

    Moara de vant era folosita sa producasunete

    E.Papadopoulos,"DistinguishedFiguresinMechanismandMachine Chapter9:HeronofAlexandriaScience",MarcoCeccarelli SpringerPrintedintheNetherland,pp.217245 2007

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    Turbine Eoliene

    Europa TurbineeolieneOrizontale

    Turbine eoliene Persane: secolele VII-X

    Asia Turbineeoliene Verticale

    Turbine eolieneTibetane si Chinezesti

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    1887JamesBlyth(Irlanda)primaturbinadevantcaregeneraelectricitate,danddestulaputerepentruunbecde25W(turbina eoliana verticala)

    1888 CharlesF.Bush(America)primaturbinacareproduceelectricitatesioperaautomat.Aceasta putea fi oprita daca vantul era preaputernic (12kW)(turbinaeoliana orizontala)

    Dupaaldoilearazboimondialsaucreatconditiipentrudezvoltareaturbineloreolienedatoritaexperienteiacumulateindezvoltareaaeroplanelor

    PrimeleTurbineEoliene Producatoare deEnergieElectrica

    Primaturbina devantcareagenerat electricitatehttps://www.strath.ac.uk/archives/iotm/march2012/

    Primaturbinacareoperaautomatsigeneraelectricitatehttps://www.pinterest.com/pin/97460779412725500/

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    Deceavemnevoiedeevaluarinumericepentruturbineeoliene?

    https://www.youtube.com/watch?v=oAWMpxX60KM

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    Energiadelaturbineeoliene

    Turbineeoliene Eficientaturbinelor

    o Performanta aerodinamicao Cost Energia eoliana inferme devant

    o Turbulenta datorata: Nivelul deturbulenta a

    vantului 6% 8%,turbulena

    offshore 10% 12%inland

    turbulen Interactiunii dintre wake

    cualte turbine

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    , Pierderidincauzaprofiluluipalei

    1 where and

    Rotortiplosses

    Coeficientul deputere ia inconsiderare cadirectia vantului seschimba dupace trece derotorul turbinei

    8

    Coeficientul deputere

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    Cele dou efecte principale alewakesunt: reduceproducia deenergie aparcului

    eolian;Crestereaturbulenteivntului,determina

    solicitarea mecanicaturbinelor. Alegerea unui modelpentru evaluarea

    turbinelor eoliene depinde detrei factori: timpul decalcul droit;precizia necesar depredicie;parametrii disponibili demodelare a

    vntului.

    9

    Wakeul Turbinelor Eoliene

    Localspinningmotionofflowaroundwindturbine

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    CFDsimulationeste unmijloc deaintelege curgerile dinfermele deturbineeoliene

    CFD Rotorul este modelat detaliile turbinei rotorului sunt modelate

    ActuatorDiskModel Rotorul este modelat ca undiscporos

    ActuatorlineModel Fiecare pala deturbineeste approximata cuolinie desurse. Seutilizeaza BladeElementmethod(BEM)pentru aestima fortele

    10

    Modelare CFD

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    CFD:ActuatorlinemodelvsActuatordiskmodel

    Actuatorlinemodel(stanga)si actuatordiskmodel(dreapta)

    L.A.MartinezTossasandS.Leonardi,"WindTurbine Modeling forComputational FluidDynamics",NRELTechnicalMonitor:Pat Moriarty,2012

    Vitezia medie insectiunea transversaldecurgere,careesteundiametrunspatelerotoruluiturbineiALM(stnga)iADM(dreapta)

    Contur deviteza ALM(stnga)iADM(dreapta)

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    1DJensenmodel modificat Diametrul wakeului se extinde liniar

    este o aproximatie buna pentru fermecare sunt relativ mici

    k wake decay coefficient x distanta la care masuram raza wake

    ului r0 raza rotorului r raza wakeului la distanta x

    2DAinsliemodel

    1 .

    b este raza wakeului Modelul ia in consideratie nivelul de

    turbulenta din mediu sau creat deturbinele anterioare

    Aproximare simpla (modelingineresc)

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    http://offwind.eu/Help/EngWindSim

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    Comparatii

    13

    Ferma Lillgrund offshorecareeste operata deVattenfallVindkraft AB.

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    Modelare inginereasca:Ainsle siJensenmodel

    Velocity distribution:Ainsle model (stanga)siJensenmodel (dreapta)

    LineA

    LineB

    LineD

    LES

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    Pressure (ALM):kmodel vs LES

    Distributia depresiune inferma LESturbulentmodelStructuredgrid:315x106 gridpointsMatthewJ.Churchfield,SangLee,andPatrickJ.Moriarty,"ALargeEddySimulationofWindPlantAerodynamics",50thAIAAAerospaceSciencesMeeting,USA,January 912,2012

    Distributia depresiune inferma k turbulentmodelStructuredgrid:7x106 gridpoints

    Ambele modele dau solutii asemanatoare calitative. LESobtine mult maimulte detalii

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    Viteza(ALM):LESturbulentmodelvskturbulentmodel

    Distributia deviteza inferma LESturbulentmodelStructuredgrid:315x106 gridpointsMatthewJ.Churchfield,SangLee,andPatrickJ.Moriarty,"ALargeEddySimulationofWindPlantAerodynamics",50thAIAAAerospaceSciencesMeeting,USA,January 912,2012

    Distributia deviteza inferma k turbulentmodelStructuredgrid:8x106 gridpoints

    Ambele modelare dau solutii asemanatoare calitative. LESobtine mult maimulte detalii.

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    Modelare inginereasca:Ainsle siAveraged CFDLESturbulentmodel

    Velocity distribution:Ainsle model (stanga)siCFD(LES)(dreapta)

    LineA

    LineB

    LineDMatthewJ.Churchfield,SangLee,andPatrickJ.Moriarty,"ALargeEddySimulationofWindPlantAerodynamics",50thAIAAAerospaceSciencesMeeting,USA,January 912,2012

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    CFDModelare (ALM)vs Modelare Inginereasca (Jensen)

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    Secredecainceputulfolosiriiputeriivantuluidateazadinsecolul17IH Turbineleeolienemodernesuntdatateinjurulsecolului11DH.

    Asia VAWT Europe HAWT

    Coieficientul deputere secalculeaza infunctie decaracteristicile turbinei sivitezavantului

    Modelareaturbineloreoliene: CFD

    CFD rotorul turbinei eoliene seia inconsiderare ca atare incalcul.Aceastametoda sefoloseste foarte rar necesita imense resurse decalcul

    ADMsiALMaurezultateasemanatoaredacasefolosesteLESturbulentmodel

    ALM(kmodeluldeturbulenta)poateaproximacomportamentulturbinei Inginereasca

    2DAinsleaproximeazamaibineputereasivitezadecat1DJensen,darrezultatelesuntasemanatoare

    Esterecomandatsaseutilizeze1DJensennumaiinfermemicideturbineeoliene.

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    Concluzii

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