Name of presentation

3Wind turbine foundations

[1]Figure X Foundation types and market share 1MonopileJacketWindFloatHywind IILattice structurePilesAnchorsAnchorsMaterial consumption (tons)1200510315250017170017Material cost1200k510K315k2500k1700kManufacturing complexity factor100%400%100%200%670%120%670%Manufacturing cost1200k2040k315k5000k456k2040k342kTotal Production cost2400k3180k7956k4082k Production Cost and LCOE comparison[2]

Table X Production cost breakdown23Comparison between fixed designsWhich concept is preferable in terms of ImportanceMonopileTripodJacketTransportability1310Corrosion protection/ allowance2310Scour3013Ship collision2301Availability of installation equipment for large water depth1033Design experience with regard to OWECS2310Complexity of joints, esp for fatigue design1301Serial production23 10Installation procedure (soil preparation)2310Deconstruction after lifetime2310Deflection at tower top2013Dependency on soil conditions303 3Unit price per tonne of steel231 0Overall weight to be expected201 3Sum of importance * comparative factors483236[3]3 most preferable, 1 second most preferable, 0 not preferableTable X Comparison matrix for different fixed designs3Based on all the information selected it was decided that the XL monopile (6-10m) would be the best selection due to short installation time, minimal manufacturing issues, zero ground preparation.

Current projects:

Gode Wind 1 and 2 - 7.5 m diameter Vatternfall project (German Bight) monopiles in 37m depth

EEW pipe fabricator in Rostock produced in 2013 a 10 m diameter cylindrical steel section from a single plate, (3m) wide and 95 mm thick

[4]Figure X 10m diameter cylindrical steel section4References:[1] European Wind Energy Association, (2012).Deep water - the next step for offshore wind energy. [online] p.12. Available at: http://www.ewea.org/fileadmin/files/library/publications/.../Deep_Water.pdf [Accessed 17 Feb. 2015].

[2] Myhr, A., Bjerkseter, C., gotnes, A. and Nygaard, T. (2014). Levelised cost of energy for offshore floating wind turbines in a lifecycle perspective.Renewable Energy, 66, pp.714-728.

[3] Schaumann, P. and Boker, C. (2005). Can jackets and tripods compete with monopiles?. In:Copenhagen Offshore Wind.

[4] FTI Inteligence, (2013).Fab claims 'XL monopile' advance. [image] Available at: http://www.rechargenews.com/incoming/article1331629.ece/alternates/article_main/10m-Schuss5.jpg [Accessed 16 Feb. 2015].