TIME TO WORK FOR
THE NEXT GENERATIONS
Offshore wind activities
Dolfines’ team delivers fit for purpose studies and solutions along the entire EPCI value chain for offshore projects:
OFFSHORE ACTIVITIES
SERVICES FOR offshore wind industry
From the FEED, Dolfines is able to manage a project from detailed engineering to the commissioning and beyond.
Our core skills are focusing on the design of large offshore structures according to environmental conditions and clients’ requirements. This is accomplished according to recognized standards such as DNV and ISO.
OUR SERVICES
After more than 20 years of existence, Dolfines’ team is able to offer high added value services in the following fields:
- Project management (management of the interfaces between stakeholders, technical visits, follow-up of the recommendations of the certifying bodies and punch list management).
- Quality and surveyance control from the manufacturing stage to the operational and maintenance stage.
- Supervision of civil engineering works (foundations, peripheral protections, cable ducts, river and road crossings, etc.).
- Selection of lifting and transport equipment, supervision of operations and control of invoicing.
- Contract management, from the call for tender to final acceptance, including punch list and claim management.
At your side IN ALL PHASES OF YOUR OFFSHORE WIND PROJECTS
1.
Detailed engeneering
Provision of designers and engineers (Offshore experts from the beginnings of the profession) participating in field implementation based on the paper design.
2.
UPSTREAM PREPARATION
Upstream preparation of installation methods and processes at the logistics hub for the provision of turbines for loading on board.
Validation of quality systems, HSE procedures, specific tools and the maritime environment…
3.
Control and survey of fundations
Control of paint standards (non-destructive control): Documentary control / thickness control / visual control / Repairs.
Participation in all reserve and guarantee exercises on the foundations.
4.
Electrical surveyance for cables
Corrosion control, cleaning and general condition check.
Verification carried out by underwater drone or certified electricity expert divers (HCBC) coupled with corrosion expertise.
5.
Manufacturing follow-up
Control and monitoring of nacelle manufacturing throughout the on-site production phases. Raising points of non-conformity and reservation.
Release of components for shipment to the logistics HUB for pre-assembly.
6.
Pre-assemembly activity follow-up
Reception of towers, nacelles and blades for quality control of the elements.
Pre-assembly test. Control of fastenings (electrical and mechanical).
Tracking to the boat (outgoing).
7.
Installation phase offshore
Receipt of turbines on boat.
Control of the turbines and installation at sea of the turbines then electrical connection.
No start-up in this phase.
8.
Commissionning phase offshore
Checking the turbines before start-up. 8-day test run.
Reporting of points and non-conformities.
Final walk-down: delivery to the customer (operator) with their agreement
9.
Operation & maintenance phase
Monitoring of turbines throughout the maintenance contract (7 to 25 years). Reserve and warranty clearances, verification of turbine performance, repair or replacement of blades. Checking the safety systems (anchoring point, etc.).
Checking paint and corrosion..
Research & Development
Our engineering department is committed to developping innovative solutions to improve the operational performance of the offshore wind sector. You will find below two examples of our award winning solutions.
THE OHME PROJECT
Ohme is a giant telescopic tower able to lift a standard crane or a specific tool at the right height to perform blade installation and major component replacement on all models of offshore wind turbines.
We believe that wind energy should not only produce green energy, but also be a pioneer in sustainable industry. Our solutions enable a significant reduction in the costs and ecological impact of the wind energy industry (installation and maintenance).
THE TRUSSFLOAT 15+ PROJECT
The Trussfloat 15+ is a floating platform for high-power wind turbines that behaves in the same way as a bottom-fixed system.
The trussfloat is a recognised product with solid prospects for the future. It has received funding from the French Environment and Energy Management Agency (ADEME), for which we have filed 3 patents and for which tests in docks have proved successful. In the long term, floating wind turbines will be cheaper than land-based offshore wind turbines.
Basis of design
Studied with NREL15MW
- Rotor Nacelle Assembly of 991t
- Blade length 117m
- Based on a stiff-stiff connection
- Hub located 150m above sea level
- Sized for French Atlantic coast metocean conditions
- Passive ballast system
- Max static tilt angle < 5°
- Maximum pitch / roll (static + dynamic) < 15°
- Acceleration @ RNA < 0.4 G
characteristics
- Colum span< 80 m
- Max overall<100 m
- Draft< 20 m
- Draft at port< 10 m
- Ratio T/MW< 300 T/MW
WHY CHOOSE US?
- Specialist of harsh environment
- No competition to established EPCIs but preferred
- Proven flexible working methods and lean cost structure
- A complete offer through two business lines: Dolfines Technologies and Dolfines Services
- Specialist on project processes, norms, standards
- Very good knowledge on offshore components (blades, towers, nacelles)
- Knowledge and experience from the Oil & Gas industry