Carbon Trust Offshore Wind Accelerator (OWA)

Transcription

1 Carbon Trust Offshore Wind Accelerator (OWA) New systems to access offshore wind turbines Phil de Villiers 19 September

2 Carbon Trust mission is to accelerate the move to a low carbon economy Technology We help develop and deploy low carbon technologies Collaborative R&D Technology scouting Innovation programme design Advice We advise businesses and governments on low carbon opportunities Measurement We measure and certify the environmental footprint of organisations, products and services 2

3 UK faces an energy gap and tough renewable energy target Installed capacity, projected demand (GW), % of UK energy from renewables, % Energy gap Projected peak demand Renewables Nuclear 8x increase required 30 Gas Coal 1% 2% Source: Committee on Climate Change, 2008 (based on DECC Energy Model) target 3

4 Costs must come down Otherwise projects will not get built Cost per MW installed ( m/mw) Drivers Rising commodity prices Bottlenecks in supply chain Complexity of sites, distance, depth FX rate volatility Robin Rigg Greater Gabbard Thanet Rhyl Flats 2.5 Gunfleet Sands 2.0 Scroby Sands Burbo Lynn 1.5 North Hoyle Kentish Flats 1.0 Barrow Year ROCs increased from 1.5 to 2 300MW Source: Emerging Energy Research 2009; Garrad Hassan 2011; Renewable Energy World.com

5 Offshore Wind Accelerator Objective: Reduce cost of energy by 10% in time for Round 3 Joint industry project involving 8 developers + Carbon Trust 45m programme 2/3 industry 1/3 public Set up in 2009, runs to % (30GW) of licensed Offshore Wind Accelerator capacity in UK waters 5

6 OWA focuses on five research areas to drive down costs Cost of energy CAPEX OPEX Yield Foundations Cables Access systems Electrical systems Cost of finance Wake effects 6

7 O&M is 25% of cost of energy O&M Yield Cost of finance Turbine I&C BoP Source: OWA,

8 Each turbine requires maintenance during the year Number of visits per turbine per year 1 planned Planned maintenance 2 5 people 2 4 days <300kg tools 6 visits / year 5 unplanned Manual restarts 2 people, hours, <25kg tools Minor repairs 2 people, 1 day, <100kg tools Major repairs 5 people, several days, <1t Illustrative maintenance schedule Source: Carbon Trust Offshore Wind Accelerator Access Competition technical specification

9 Transfers today Calm seas Step across transfers up to 1.5m Hs Vessels deployed from port Monopile foundations Image courtesy of E.ON

10 New wind farms larger, further from shore Moray Firth 1.3GW Mean number of turbines R1 R2 R3 Firth of Forth 3.5GW Dogger Bank 9GW Mean distance to shore (km) Hornsea 4GW R1 R2 R Irish Sea 4.2GW Norfolk 7.2GW Atlantic Array 1.5GW West Isle of Wight 0.9GW Hastings 0.7GW Source: UK Ports for the Offshore Wind Industry: Time to Act, DECC / BVG Associates, 5 February 2009, p.17; Financial Times, January 2010; Carbon Trust analysis 10

11 Over 40 visits per day may be required in Round 3 And each visit requires at least two transfers Today 1,341MW 436 turbines x6 visits / year 7 / day 2,600 / year Round 3 32,215MW 5,400 turbines 1 x3 visits / year 2 44 / day 16,000 / year 1. Assumes 6MW turbines. 2. Assumes improved reliability reduces number of maintenance visits in half Source: Carbon Trust Offshore Wind Accelerator Access Competition technical specification 2010, Carbon Trust analysis R3 capacity from The Crown Estate

12 Round 3 metocean conditions will be tougher aaa Rough seas Far from shore Monopiles, jackets, gravity bases, tripods Safer transfer systems required! Source: Statoil 12

13 Optimising O&M strategies will improve availability Potential availability improvements vs current strategies Number of turbines Near shore (0-50km) Intermediate (50-100km) Far shore (>100km) Low Low Low Low Medium Medium Medium Medium High % point improvements identified vs benchmark strategies For example, using combinations of vessels and transfer systems to replace offshore bases with helicopter support 13

14 New wind farms likely to require mothership strategies Port-based strategy Mothership strategy 14

15 Market screening suggests technologies unsuited to R3 New O&M strategies and technologies required Source: Carbon Trust Offshore Wind Accelerator

16 Round 3 wind farm What will we need? Note: Image represents Round 3 site with V MW. Drawings are of 90m mothership and 30m in-field vessel, drawn to scale. Original picture is of Thanet, courtesy of Vattenfall 2010 Source: Carbon Trust

17 In-field vessel Round 3 wind farm Desirable vessel characteristics Operate in high sea states Fuel efficient Capacity for several technicians and equipment Speed to access turbines in short weather windows Note: Image represents Round 3 site with V MW. Drawings are of 90m mothership and 30m in-field vessel, drawn to scale. Original picture is of Thanet, courtesy of Vattenfall 2010 Source: Carbon Trust

18 Transfer system Round 3 wind farm Desirable vessel characteristics Stable platform Good station-keeping Desirable transfer system characteristics Operate in high sea states Fast to deploy Robust fail-safe mechanisms Operates on variety of vessels Note: Image represents Round 3 site with V MW. Drawings are of 90m mothership and 30m in-field vessel, drawn to scale. Original picture is of Thanet, courtesy of Vattenfall 2010 Source: Carbon Trust

19 Mothership Round 3 wind farm Desirable mothership characteristics Capacity for multiple daughter-craft Comfortable for technicians Affordable Desirable launch and recovery system characteristics Operate in high sea states Fail-safe mechanisms Note: Image represents Round 3 site with V MW. Drawings are of 90m mothership and 30m in-field vessel, drawn to scale. Original picture is of Thanet, courtesy of Vattenfall 2010 Source: Carbon Trust

20 OWA Access Competition resulted in many strong entries Competition results 1,500 info packs 450 entries 30 countries 13 finalists Note: Image represents Round 3 site with V MW. Drawings are of 90m mothership and 30m in-field vessel, drawn to scale. Original picture is of Thanet, courtesy of Vattenfall 2010 Source: Carbon Trust

21 We tapped into experience from other sectors Maritime Industry Robotics Navy Aviation Car Industry Aerospace Automation Oil and Gas Subsea Industry 21

22 Concept development of 13 access systems is underway Vessels Nauti-Craft Umoe Mandal SES North Sea Logistics Pivoting Deck Vessel Fjellstrand Windserver TranSPAR ExtremeOcean Innovation 22

23 Concept development of 13 access systems is underway Transfer systems Auto Brow Ad Hoc Marine, South Boats Mots - Momac TAS2 Houlder & BMT Nigel Gee Wind Bridge Knud E. Hansen 23

24 Concept development of 13 access systems is underway Launch and recovery systems Divex LARS - Divex Offshore Kinetics L&R system Z Port Z Technologies 24

25 Next steps: sea trials Systems required to measure vessel movements and sea state OWA members will be conducting sea trials of new vessels and transfer systems Sea trials will follow procedures developed to benchmark performance in a consistent way, considering Transit from port or mothership to turbine Approach to turbines for transfer Transfer from vessel to turbine Performance will be assessed for different Wave heights Wave periods Wave directions Performance data will be shared between OWA members 25

26 Conclusions New wind farms require more capable vessels and transfer systems OWA has identified promising concepts we hope many will get to market and deliver improved availability Industry is increasingly interested in measuring performance of new vessels and transfer systems This will require sea trials using consistent procedures and new systems to measure vessel movements and sea state New measurement systems should also help operators to understand when it s safe to transfer 26

27 Questions Phil de Villiers