Corrosion challenges in Offshore energy systems

Transcription

1 IBN Offshore Energy Corrosion challenges in Offshore energy systems Ozlem Ceyhan Yilmaz Sirris-Diepenbeek Met support van:

2 Outline IBN Offshore Energy and its scope Mission, partners, priority topics Challenge: Material degradation Types of Corrosion Actual problems in offshore wind Coating specifications in standards Examples from offshore wind Blades Solutions Track record example: Arkona Project Economical Potential Summary and conclusions

3 Mission

4 Involved Partners 50 member companies 10/2018

5 Priority Topics

6 Challenge: Material Degradation Application of Coatings is a solution Pitch systems Bearings Gear box Nacelle Control unit Ventilation Cooling Blades Tower Stairs Doors Support structures Monopile, jackets Access platforms Transition Piece Ladders, doors, etc

7 Type of Corrosions General corrosion Find figures Galvanic corrosion Crevice corrosion Pitting corrosion Intergranular corrosion Selective leaching Erosion corrosion Stress corrosion/corrosion fatigue Fouling induced corrosion

8 What is the actual problem? Offshore engineering knowledge from oil&gas Why not suitable for offshore wind? Maintenance free operations 25+ years OWP cannot be brought back to the shore There are no personnel on the OWPs Expensive repair costs The standards are coming from Offshore oil&gas, marine engineering and shipping industry

9 Different zones in sea environment (DNV-GL) 2017

10 Splash Zone coating specifications (International standards, summary*) * 2017

11 Lack of data/track record, failures, mistakes,

12 Lack of data/track record, failures, mistakes,

13 Blades: they don t rust, but Leading edge erosion is caused by the impact by the rain.

14 Blades: even if they don t fail Small-local damages at the leading edge cause power losses, before they grow to a blade failure. ORE Catapult measurement results: Leading edge repair of a moderately eroded blades produces 1.5% more AEP (annual energy production).

15 Inside the Nacelle

16 Solutions New coatings, coatings innovations. Better understanding of coatings and their durability Surface preparation requirements how much applicable/reliable for offshore wind? Quality of the coating applications/repairs/ease of maintenance Condition monitoring to prevent failures: i.e. using different colored layers. Offshore wind specific, high quality demonstrations to test the durability/applicability/repairability of coatings in different conditions. Track record: risk assessment for insurances, bankability, etc.

17 Track record example: Arkona Project

18 Economical Potential in Coatings For the Belgium offshore wind farms; 940m in 2020 Double in 2030

19 Summary and Conclusions Actual challenge is the material degradation. It happens in all components Main difference between offshore oil&gas / the ship industry and the offshore wind is the maintenance free operations with a lifetime of 25+years Many standards are coming from ship industry. Not always applicable for offshore-wind New standards lack track record. Still several problems occur; failures, damages, mistakes Solutions should be a combination of new coating developments, monitoring systems. Long term reliable testing is very important for the applicability of the coatings. There is a large economical potential in Belgium and overall Europe

20 How can IBN Offshore Cluster help? State of the art in industry/science Project proposals - initiations Networking B2B Support the business case Power loss/availability estimations Cost of energy estimations Case studies Ozlem Ceyhan Yilmaz Pieter Jan Jordaens Christof Devriendt Pieter Mathys

21 Contact person & more information @OWI_lab

22 Image processing

23 ISO standard for surface preparation