1、Stiesdal Stiesdal A/S 2019,All Rights Reserved 1Leading edge floating offshore wind technology The Tetra ConceptHenrik Stiesdal,01.06.19Stiesdal Stiesdal A/S 2019,All Rights Reserved 2Offshore wind power is developing tremendouslySource:GWEC05,00010,00015,00020,00025,0002008 2009 2010 2011 2012 2013

2、 2014 2015 2016 2017 2018Installed capacity(MW)Global installed offshore wind capacityOne of the fastest growing energy sectors10-year Compound Annual Growth Rate 30%Market has doubled every 3 yearsOver same period LCOE has dropped 60%Within a few decades offshore wind can become the main source of

3、electricity in large parts of the worldCAGR 30%Stiesdal Stiesdal A/S 2019,All Rights Reserved 3But there is a problem-Source:NOAAOffshore wind as we know it now is only applicable in selected locationsMaximum water depth of fixed foundations 40-50 mCan be applied in Northern Europe,off China and off

4、 US East CoastMost other population centers have much too deep nearshore waters AnomalyNormalNormalNormalNormalStiesdal Stiesdal A/S 2019,All Rights Reserved 4The solution is obvious floating offshore windSource:Equinor,Principle Power,Hitachi,MHIStiesdal Stiesdal A/S 2019,All Rights Reserved 5But a

5、gain,there is a problem floaters are not industrializedSource:Equinor,Principle Power,Mitsui,MHI U MaineShared characteristicsVery heavy from 3000 tons to 10.000 tons for 8 MW class turbinesConstruction methods from shipbuilding and offshore oil and gas sectorFabrication typically required to be at

6、port of floater launchBuild times typically measured in monthsTens of thousands of man-hours per foundation for steel cutting,fitting,welding,handling,etc.Stiesdal Stiesdal A/S 2019,All Rights Reserved 6The first truly industrialized large-size product the Ford Model TSource:Ford Motor Co.19091923St

7、iesdal Stiesdal A/S 2019,All Rights Reserved 7The power of industrializationSource:Ford Motor Co.Stiesdal Stiesdal A/S 2019,All Rights Reserved 8In wind power we also benefit from genuine industrializationSource:Danish Wind Industry AssociationA world champion the wind turbine towerProbably the worl

8、ds lowest cost per kg of any large steel structureHigh quality welds and surface protectionAround 100.000 tower sections manufactured annually in highly industrialized processesHow did we get there?Separation of fabrication and installationModularization and standardization No IP of any significance

9、 costs kept low through open competition on cost and qualityStiesdal Stiesdal A/S 2019,All Rights Reserved 9Enter the Tetra concept industrialized floating wind power MindsetConventional thinkingWe have designed this structure now,how do we build it?TetraSpar thinkingWe need to manufacture this way

10、now,how do we design it?ConceptModular all components factory-made,transported by roadComponents assembled at quayside,just like the turbine is assembledTurbine mounted in harbor and towed to site,no installation vesselsWeight 1500-2000 t for 8 MW turbineStiesdal Stiesdal A/S 2019,All Rights Reserve

11、d 10The fundamental choice regarding the supply chain10%100%000000Relative costTotal number of units producedThe learning curveWe can start here Or we can start here!Stiesdal Stiesdal A/S 2019,All Rights Reserved 11The Tetra product rangeStiesdal Stiesdal A/S 2019,All Rights Re

12、served 12The TetraSpar DemonstratorStage 1-2016ConceptInitial validationStage 2-2017DesignTank test OKStage 3-2020PrototypeFull validationStage 4-2021Pilot projectRelease 0.2m 18mPrototype Siemens SWT-3.6-130,3.6 MW rated power,130 m rotor diameter Status 30.05.19:Fabrication start June 2019,install

13、ation scheduled for April,2020 Foundation contractor:WelconStiesdal Stiesdal A/S 2019,All Rights Reserved 13The TetraSpar Demonstrator installation processStiesdal Stiesdal A/S 2019,All Rights Reserved 14Shared characteristics for the Tetra product rangeCan be adapted to any turbine size and any wat

14、er depth bottom-fixed to 10-60 m water depths,floating to 40-1000+m water depthsFully industrialized,utilizing existing tower-manufacturing supply chainFast and robust assembly in port of embarkation;no facilities needed other than a flat area at quaysideEasy launch using slip or semisubmersible bar

15、ge Turbine installation at quayside using land-based cranePre-commissioning at quayside possibleEasy towing to site using conventional vesselsStiesdal Stiesdal A/S 2019,All Rights Reserved 15The Tetra concept allows maximum flexibility in site selectionSeamless transition from bottom-fixed to floati

16、ngThe bottom-fixed TetraBase can be used at water depths of 10 60 mThe floating TetraSub can be used at water depths of 40 1000+m The optimum transition depth will generally be selected on the basis of seabed conditions,seismic challenges,etc.Conditions for O&M are similarStiesdal Stiesdal A/S 2019,

17、All Rights Reserved 16In summary the Tetra conceptThe keyword Industrialization!Modular all components factory-made,transported by roadComponents assembled at quayside,just like the turbine is assembledTurbine mounted in harbor and towed to site,no installation vesselsWeight 1500-2000 t for 8 MW tur

18、bine,bottom fixed variant has weight around 1000 tVolumes can be ramped up quickly based on existing tower supply chain and existing port facilitiesThe Tetra concept has the potential to radically transform offshore wind powerStiesdal Stiesdal A/S 2019,All Rights Reserved 17Thanks for your attentionHenrik S