10 Witte TUV Rheinland

Offshore Certification with TV Rheinland Support and Safety for a Floating Project

Tokyo, February 2013

Offshore Certification with TV Rheinland February 2013. 2

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Testing Inspecting Certifying Qualifying Consulting

Products Systems Processes People


TV Rheinland. Approval for Certification.

2010: Acceptance from the German Authorities (BSH) for Project Certification

2012: DAkkS Accreditation for Component- and Type-Certification


TV Rheinland. Certification Standards.

Standards

IEC 61400 series GL - Guideline for the Certification of Offshore Wind Turbines DNV Offshore Standard Design of Offshore Wind Turbine Structures BSH Standard Design of Offshore Wind Turbines BSH Standard Ground Investigations for Offshore Wind Farms


Project Certification according to IEC 61400.

The purpose of project certification is to evaluate whether type-certified wind turbines and particular support structure/foundation(s) designs are in conformity with the external conditions, applicable construction and electrical codes and other requirements relevant to a specific site. [] The certification body shall evaluate whether the wind conditions, other environmental conditions, electrical network conditions and soil properties at the site conform with those defined in the design documentation for the wind turbine type and foundation(s). The evaluation includes safety and quality.


Project Certification according to IEC 61400.

Type Certificate

Manufacturing Surveillance

Assessment of Site Conditions

Assessment of Design Basis

Assessment of Site Specific

Design

Transport and Installation Surveillance

Commissioning Surveillance

Certificate of Conformity






Final Evaluation Report

Project Certificate

Operating Phase Periodic Monitoring


Development

Verification/assessment of Site conditions

wind conditions geotechnical conditions marine conditions weather windows

Design basis codes and standards

and their hierarchy design parameters and

principles support structure

concept requirements:

manufacuring, transportation, installation, o&m, grid connection

Integrated load analysis

Project Certification along the course of the project.

Design Verification/assessment of Site-specific wind turbine design

requirements Site-specific support structure

design design with respect to

load analysis design with repect to

structural integrety design documentation plans for manufacturing,

transportation, maintenance

Implementation Manufacturing surveillance Turbine and support structure

requirements: design documentation, test programs

quality system of manufacturer (also sub-suppliers)

production process quality control

Transportation and installation monitoring of sea-

transportation

Commissioning surveillance

Operation Operation and

maintennance surveillance in regular intervals

Separation in phases:

Project Certificate of

TV Rheinland

Final evaluation


Project Certification Details. Site Assessment.

Soil Literature search Bathymetric and geophysical surveys (echo sounding, side scan sonar, seismic surveys) Preliminary geological report

At lease one borehole and one cone penetration test (CPT) at each corner of wind farm area and in center, at least 10% of all turbine sites:

- soil profiles - soil mechanical parameters - description and assessment of foundation soil

Preliminary geotechnical site survey report

One boring and cone penetration test at each turbine site Preliminary soil and foundation expertise

Geological report

Wind Metocean Mean still water level (MWL) Min./Max. still water level Lowest/Highest astronomical tide (LAT, HAT) Water level conditions (short/long term) Site specific measurements Hindcast studies Long term statistical data Wave conditions

Correlation between water level data and wind data

Site specific measurements Statistical data combined with flow models Currents

Ice conditions

Other site conditions

Measurements/correlation with long-term data from local meteorological stations

- reference wind speed - normal average wind speed - wind speed distribution - wind direction distribution - turbulence intensity - wind shear

Modeling wind conditions Wind farm influence Wind conditions

Seismicity Salinity Temperature Marine growth Air density Ship traffic Disposed matters


Examples for Calculations.

Leading experts in the fields of static and dynamic calculations, esp. for offshore wind farms:

Load analysis Collision analysis FEM calculations

Development of methods for the analysis of dynamic pile load tests in close cooperation with BAM (Federal Institute for Materials Research and Testing)

SAMCEF software: comprehensive package (all-in-one) for integrated load analysis (total dynamic calculations including soil, wave and wind); integrated calculation methods with broad acceptance


TV Rheinland Project Certification. Implications.

- Confirmation

Type-certified wind turbines and foundation designs meet requirements

governed by site-specific external conditions and are in conformity with

applicable local codes

- Assurance for the project the earlier the better

As the globally independent Certification Body TV Rheinland

- looks closely at all aspects of the project

- keeps an overview of the progress at any time

- supports successful realization with our knowledge

- Minimization of technical risks

- Assurance for the investors


GICON SOF.

The GICON SOF (Floating Offshore Foundation)

Buoyancy elements Vertical bracing Additional diagonal bracing

Background Data Applicable from 25 to 350 meters Modular construction, supply chain flexibility Complete assembly at portside Transport of the entire structure to the deployment location Limited impact on sediment Maintenance friendly Entire structure can be towed into port for replacement


GICON SOF. Calculation Monopile vs. GICON SOF.

operating conditions: - vw = 12 m/s - hs = 1,00 m - Ts = 4,5 s - Depth of water 18 m

(Baltic 1)

Movements of the SOF are less than movements of monopile under operating conditions

TLP vs. Monopile


GICON SOF- HSVA* Experiments.

Scaling after FROUDE Scaling factor = 25 Incoming flow angle 0, 22,5 and

45 Only wave loads Fixed ( = 31 ; = 90 ) and

swimming states Depth of water: 30 m

1:25 scaled modell *Hamburgische Schiffbau-Versuchsanstalt GmbH


Document Review Process. Accompanying Design Process.

No

Yes

Submission of a document e.g. reports, designs, calculations, analyses, concepts, etc.

Document review by TV Rheinlands Experts Conformity/plausibility checks

acc. to agreed on rules & standards

or

Verification in form of independent calculations

Approval?

Revision of document for resubmission

Pending until documents package complete

Package complete?

Yes

No

Client


Complete

Review result: Document status report


Project Certificate.

Project Certificate Required Certificates of Conformity Final Evaluation


TV Rheinland Project Certification. Conclusion.

- Project Certification on basis of international standard series IEC 61400

- Continuous monitoring by TV Rheinland as the global independent

Certification Body throughout all project phases guarantees continuous

quality assurance and minimizes technical risks

- Assurance for the investors

- Certification of the GICON-SOF project according to latest standards for

floating devices

- Additional steps to enhance assurance by:

- Accompanying certification of design process (early error detection)

- Preliminary quality checks


Yoshihiro Sugita TV Rheinland Japan Ltd. Global Technology Assessment Center 4-25-2 Kita-Yamata, Tsuzuki-ku Yokohama 224-0021 Mail: [email protected]

Contact:

Frank Witte TV Rheinland International Am Grauen Stein D - 51105 Cologne Mail: [email protected]

Andreas Puls TV Rheinland Industrie Service GmbH Julius-Vosseler-Strae 42 D - 22527 Hamburg Mail: [email protected]

www.tuv.com

Thank You for Your Attention.

Offshore Certification with TV RheinlandSupport and Safety for a Floating Project 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18Document Review Process. Accompanying Design Process. 20 21 22

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10 Witte TUV Rheinland