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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.
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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
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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.
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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
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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
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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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