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Projetos de energia renovável no oceano Dr. Milad Shadman Prof. Segen F. Estefen

Projetos de energia renovável no oceano Dr. Milad Shadman Prof. Segen F. Estefen. Research Areas. Maintenance, Inspection and Repair. Flow Assurance . Subsea Production Systems/ Subsea Pipelines and Risers. Chemical Phenomena Study in Subsea Environments.

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Projetos de energia renovável no oceano Dr. Milad Shadman Prof. Segen F. Estefen

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  1. Projetos de energia renovável no oceano Dr. Milad Shadman Prof. Segen F. Estefen

  2. Research Areas Maintenance, Inspection and Repair Flow Assurance Subsea Production Systems/ Subsea Pipelines and Risers Chemical Phenomena Study in Subsea Environments Integrity and Reliability of Structures and Equipment Well Drilling and Completion Composite Materials and Intelligent Materials Offshore wind and Ocean Renewable Energy

  3. Wave Energy Converter (WEC) Oscillating water column (OWC) Oscillating body Power take-off (PTO) Overtopping PTO Images: NREL

  4. Tidal and ocean current Tidal barrage Horizontal-axis Oscillatory hydrofoil Venturi-effect Vertical-axis Source: http://global.britannica.com Images: (Augustine et al, 2012)

  5. Gradiente térmico (OTEC) • (Fonte: Lockheed Martin Corporation)

  6. Gradiente de salinidade Osmose retardada por pressão (ORP) • Extrair a pressão química devido a mistura de água salobra e água • Eletrodiálise reversa (EDR) • Método de EDR baseia-se no transporte de íons (sal) através de membranas • A diferença do potencial químico entre as membranas resulta em uma tensão elétrica Skråmestø et al, 2009 Van den Ende and Groeman, 2007

  7. Fundações das turbinas eólicas Estruturas flutuantes Torre Monopilar Estruturas fixas Semissubmersível TLP Spar

  8. Nível de maturidade da tecnologia (TRL) Fonte: http://www.emec.org.uk

  9. Research activities • Mestrado • (5) • Doutorado • (2) • Pós doutorado • (4) • Assessment of marine renewable energy resources • Wave energy converters • Offshore wind turbines • Hybrid wind-wave systems

  10. Assessment of marine renewable energy resources Ocean current Wave 10 MW OTEC plants 20 OTEC plants10% of the residential electricity consumption of the Northeast which was 27 TWh in 2017 (EPE) OTEC

  11. Theoretical and technical offshore wind potential • Three scenarios for 6 and 10 MW: • Exclusive Economic Zone (EEZ) • Between 18 km of coastline and 1000 m depth • 0-25-50-75-100-500-1000 Reanálise atmosférica – 3 bases de dados 6 MW capacity factor

  12. Wave energy converters • COPPE hyperbaric wave converter • 100kW capacidade instalada • Ceará, Pecém (2012) • COPPE offshore wave converter • 50kW capacidade instalada • CEO flutuante • Analise numérica • COPPE nearshore wave converter • 50kW capacidade instalada • Ilha Rasa, Rio de Janeiro References: Estefen, S.F et al. (2007, 2012) Shadman, M et al. (2015)

  13. Latching control Without latching With latching

  14. Nonlinear stiffness control system (NSS) Objective: Investigate the influence of NSS on improving WEC performance. • Increasing the resonance period and broaden the response bandwidth theoretically; • Indicating that the constraints of mechanical characteristics weaken the performance of NSMech drastically; • Propose an alternative NSPneu and verify its performance. (AEP = 33.17 MWh without NSS) with NSPneu (94.70 MWh) with NSMech (36.66 MWh)

  15. PTO dry-test equipment

  16. [Carbon Trust. 2015] Offshore wind support structures [Pimenta et al. 2018] Floating systems Grounded systems Water depth: < 35 m 35 – 60 m > 60 m

  17. Techno-economical study of the floating offshore wind Offshore wind [Pimenta et al. 2018] Water depth 50-300 m NREL 5-MW turbine on the ITI Energy Barge Tuned Liquid Column Damper (TLCD) Hs = 5 m, Tp = 12.5 s, NTM Water depth 50-300 m Up to 50% reduction in pitch

  18. Floating hybrid wind-wave system Wave energy converter Floating platform Meshed body AQWA/ANSYS

  19. Techno-economic feasibility of using sandwich-pipe as tower for offshore wind turbines Sandwich-pipe SHCC (strain-hardening cementitious composites) Patentedby LTS

  20. CFD modeling of floating wind turbine Numerical Results Velocity Magnitude Full-scale model Blade diameter = 126 m Tower height = 90 m Capacity = 5 MW Vortex Shedding RANS Equations + a Turbulence Model + Continuity Equation Wind speed = 20 m/s Turbulence intensity = 5% • Considering viscous and nonlinear Hydro-aero effects. • Avoiding high costs and complexity of performing experiments. STAR-CCM+

  21. THANK YOU! E-mail: Milad.Shadman@lts.coppe.ufrj.br Site: http://www.lts.coppe.ufrj.br/

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