Design and validation challenges of floating foundations: Nautilus 5MW case. Iñigo Mendikoa Research Engineer

Transcription

1 Design and validation challenges of floating foundations: Nautilus 5MW case Iñigo Mendikoa Research Engineer

2 Index Tecnalia Research&Innovation Floating Offshore Wind Nautilus concept Technical challenges R&D Activities 2

3 Tecnalia Research&Innovation Organisation 6 INTERCONNECTED BUSINESS DIVISIONS This way of working is the best example of our innovative spirit applied to an operational model, where cooperation works thanks to the transversality of teams, projects and clients. Wind Energy Denmark, Herning, Oct 2 nd

4 Tecnalia Research&Innovation Main figures in 2016 PEOPLE IN TECNALIA 1,405 STAFF 57 % MEN 43 % WOMEN 30 DIFFERENT NATIONALITIES 102,1 M INCOME Figures on 31 December 2016 Wind Energy Denmark, Herning, Oct 2 nd

5 Tecnalia Research&Innovation Offshore Renewable Energy 2004: Marine Renewable Energy department creation. 2009: Floating Offshore Wind team creation. From 2012: Over 20 members with expertise in naval architecture, aerodynamics, hidrodynamics and structural design. Wind Energy Denmark, Herning, Oct 2 nd

6 Tecnalia Research&Innovation Floating Offshore Wind Coupled models for floating offshore wind platform design and optimization. Models validations through experimental testing. Mooring systems design. Experimental analysis of mooring components (Chain/Umbilical cable). Wind Energy Denmark, Herning, Oct 2 nd

7 Tecnalia Research&Innovation Coupled models for Floating Offshore Wind FAST AND ORCAFLEX COUPLING METHODOLOGY Wind Energy Denmark, Herning, Oct 2 nd

8 Tecnalia Research&Innovation Mooring testing at Tecnalia Chain fatigue analysis (Vicinay) 400-ton fatigue test bench for characterization of fatigue behavior of mooring chains in seawater (Chain sizes: 70 mm to 180 mm). Umbilical cable bending fatigue test Up to 11m long cables at max 0.2Hz. Wind Energy Denmark, Herning, Oct 2 nd

9 Floating Offshore Wind Reasons to go deeper Limited shallow water locations. Most of the resource is in deep waters and less turbulence. Reduced environmental impact. Huge potential around the world. Access to markets without extended continental shelf USA, Japan, Norway, Spain, Portugal, Even in the North sea there are areas with high wind resource in deep waters. Coastal areas with high energy demand. Wind Energy Denmark, Herning, Oct 2 nd

10 Floating Offshore Wind Technologic approaches Wind Energy Denmark, Herning, Oct 2 nd

11 NAUTILUS concept Benefits from semi-submersible Onshore wind turbine assembly. No special/custom made means are necessary for load out and towing. Reduced draft allows to transit shallow waters. Well-known technology in O&G industry. Low frequency movements. Simple and reliable mooring system installation. Tidal level insensitivity. Wind Energy Denmark, Herning, Oct 2 nd

12 NAUTILUS concept Size comparison Wind Energy Denmark, Herning, Oct 2 nd

13 NAUTILUS concept Main features Four-columns semisubmersible steel structure. Passive ballast / Active water ballast. Standard catenary mooring. Wind Energy Denmark, Herning, Oct 2 nd

14 NAUTILUS concept Features and Advantages Wind Energy Denmark, Herning, Oct 2 nd

15 NAUTILUS concept Basic platform design flowchart Wind Energy Denmark, Herning, Oct 2 nd

16 NAUTILUS concept Tank testing Operational Survival H s =1,88 T p =9,15 V w =11,5 H s =14,12 T p =15 V w =50 V c =0,9 Displacements Displacements Axis Static Peak to Peak Static Peak to Peak X (m) 9,71 4,38 m 8,51 6,31 Z (m) 86,50 0,47 m 89,00 5,34 Pitch (º) -0,76 3,01-0,71 3,56 Acceleration Acceleration Axis Static Max Static Max X (m/s 2 ) 0,20 0,65 0,46 1,47 Z (m/s 2 ) 0,09 0,29 0,47 1,41 Pitch (deg/s 2 ) 0,12 0,47 0,27 0,90 Mooring Loads Mooring Loads Line Static Peak to Peak Static Peak to Peak L1 (+) 91,35 Tm 5,55 Tm 82,39 Tm 86,80 Tm Pitch angle < 2 degree Max acceleration < 2,5 m/s 2 L3 (-) 32,21 Tm 1,46 Tm 35,73 Tm 10,45 Tm Wind Energy Denmark, Herning, Oct 2 nd

17 Technical Challenges (I) Wind Turbine: Need to develop turbine designs specifically for floating structures (control, motion limits). Foundation Structure: Support structures for current demonstration projects have not been fully optimised. Behaviour of structure poorly understood due to lack of operational experience. Shipyards not equipped for serial production, leading to uncertainty in costs. Wind Energy Denmark, Herning, Oct 2 nd

18 Technical Challenges (II) Moorings: Poor understanding of the dynamic behaviour of moorings. Cost of anchors and their installation is high. Electrical Infrastructure: Lack of experience with dynamic power cables and substations. Design: Software tools simulating the whole system behaviour are not fully validated. Installation & Maintenance: Distance and environmental conditions limit inspection and maintenance. Wind Energy Denmark, Herning, Oct 2 nd

19 R&D Activities Participation in Regional, National and European R&D Projects H2020 SME Instrument New Floating Platform for offshore wind in deep waters Phase 1 awarded EU contribution: H2020 LCE2: EERA Wind LIFES 50+ Project Optimize and qualify to a TRL 5, of two innovative substructure designs for 10MW turbines Budget: 7.3 MM DNV-GL Joint Industry Project Coupled Dynamic Analysis of Floating Wind Turbines HAZITEK 2016 Basque Country Development of a Structure for Floating Offshore Wind Budget: 210 k SODERCAN: I+C=+C SAFE: Development of a Motion Compensated Gangway to Access Marine Energy devices Budget: 1.1 MM CDTI CIEN: FLOCAN2GRID New Solutions for Innovative Platforms and Technologies associated to the evacuation and network integration of Floating Offshore Wind Farms. Budget: 9.5 MM Wind Energy Denmark, Herning, Oct 2 nd

20 R&D Activities H2020 LCE2: EERA Wind LIFES 50+ Project Objectives: Optimize and qualify to a TRL 5, of two innovative substructure designs for 10MW turbines Develop a streamlined KPI based methodology for the evaluation and qualification process of floating substructures Focus: Floating wind turbines installed in water depths from 50m to 200m Offshore wind farms of large wind turbines (10MW) identified to be the most effective way of reducing cost of energy in short term Budget: 7.3 MM Wind Energy Denmark, Herning, Oct 2 nd

21 R&D Activities OC5: Offshore Code, Comparison, Collaboration, Continued, with Correlation Code-to-data validation of offshore wind modelling tools. Extension of IEA Wind Task 30: Three phases examinating three different systems Semisubmersible tested by DeepCwind in 2011 was retested at MARIN in 2013 with new, better performing turbine. Turbine is MARIN stock turbine (NREL 5MW scaled at 1:50). Series of wind/wave tests performed. OC5-DeepCWind semisubmersible 1/15 scale model, tested at MARIN. (Source: OC5 IEA project) Wind Energy Denmark, Herning, Oct 2 nd

22 NAUTILUS Floating Solutions An industrial group dedicated to the design and construction of all kind of vessels The first private R&D entity in Spain and one of the most relevant centers in Europe. The world leader in the supply of chains and mooring systems for the offshore industry An industrial group focusing its activity on engineering solutions from construction to maintenance engineering of industrial facilities Collaboration agreement: An international group that operates in the field of electrical networks, electronics and communications. Leader in the supply of MV cells for the offshore wind market Wind Energy Denmark, Herning, Oct 2 nd

23 Thank you for your attention Tecnalia Research & Innovation Parque Científico y Tecnológico de Bizkaia Edificio 700 E Derio, Bizkaia Spain Inigo.mendikoa@tecnalia.com