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Chairs:
Nicolas Fichaux, European Wind Energy Association (EWEA)
Rogier Nijssen, WMC, The Netherlands
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Session description The wind industry has identified the need for increased knowledge of offshore wind turbine reliability and performance as a key element in lowering the risks and costs of energy. Predicted market volumes justify the building of dedicated test and demonstration facilities. Numerous initiatives have been launched, aimed at improving the knowledge base and expanding the scientific and experimental infrastructure. These efforts are now starting to bear fruit; research programmes have been approved and initiated, and the implementation of unique test facilities for large scale wind applications is well on its way. During this session, the speakers will report on the objectives, specifications, and results of research for the advancement of offshore wind technology, including their visions on the future of co-operation on research and testing, and its advantages. |
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INTRODUCTION ON TP WIND AND TEST FACILITIES Nicolas Fichaux, European Wind Energy Association (EWEA) |
AT3.1 |
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THE TECHNICAL MONITORING PROGRAMME AT OFFSHORE WIND FARM EGMOND AAN ZEE Jaap 't Hooft, SenterNovem, The Netherlands |
AT3.2 |
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FIRST RESULTS OF HANSEN’S 13MW TEST FACILITY FOR WIND TURBINE GEARBOXES Joris Peeters, Hansen Transmissions International, Belgium |
AT3.4 |
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RESEARCH GOES OFFSHORE - ALPHA VENTUS READY FOR RAVE RESEARCH ACTIVITIES Michael Durstewitz, ISET e.V., Germany |
AT3.5 |
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VERIFICATION OF OFFSHORE WIND TURBINES - THE OWEA PROJECT AT “ALPHA VENTUS” Martin Kühn, Universität Stuttgart, Germany |
AT3.6 |
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FULL-SCALE TEST FACILITIES - ENSURING RELIABILITY FOR OFFSHORE WIND Richard Court, NaREC, United Kingdom |
AT3.3 |
Chair:
Ndaona Chokani, Swiss Federal Institute of Technology, Switzerland
Ignacio Marti, CENER, Spain
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Session description The risk in the performance of a wind energy project is impacted by a large number of parameters, not least of which is the wind resource. A correct estimate of the wind resource can make or break the economics of a wind energy project. Therefore, this resource must be accurately detailed both for the short and long term, and fine & coarse spatial resolutions. A higher level of confidence in the wind resource assessment facilitates the financing and the subsequent operation of the wind energy project. In this session, innovative measurements and computer modelling techniques that are used to detail and exploit the offshore wind resource, over different spatial and temporal scales, will be presented. |
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WIND STATISTICS OFFSHORE BASED ON SATELLITE IMAGES Charlotte Hasager, Risø DTU, Denmark |
AT4.1 |
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A NEW WIND MAP FOR THE NORTH SEA - COMBINING THE STRENGTHS OF EARTH OBSERVATION DATA, MESOSCALE MODELLING AND MAST MEASUREMENTS Joseph Phillips, Garrad Hassan, United Kingdom |
AT4.2 |
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IMPROVED MODELLING OF WAKES AND POWER OUTPUT IN LARGE OFFSHORE WIND FARMS BASED ON DATA FROM NYSTED AND HORNS REV Leo E. Jensen, DONG Energy, Denmark |
AT4.3 |
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POWER PERFORMANCE AND WAKE EFFECTS IN THE CLOSELY SPACED LILLGRUND OFFSHORE WIND FARM Jan-Åke Dahlberg, Vattenfall, Sweden |
AT4.4 |
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EU-NORSEWIND – ASSESSMENT OF VIABILITY OF OPEN SOURCE CFD CODE FOR THE WIND INDUSTRY Matt Stickland, University of Strathclyde, United Kingdom |
AT4.5 |
Chairs:
Göran Dalen, WPD, Sweden
Allan MacAskill, Seaenergy Renewables, United Kingdom
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Session description Substructure design and manufacturing is one of the key areas for offshore wind energy. This is where considerable cost savings can be found, which is essential to making offshore wind energy competitive. It is also an area open to innovative thinking to help overcome the harsh offshore environment. The offshore oil and gas industry has a great deal of experience to offer. However, costs must be reduced and the complexity of offshore wind technology should not be underestimated. How can we combine innovative design with mass production resulting in cheap, reliable and safe substructures for future offshore wind energy developments? |
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THE LOGISTICS OF DELIVERING MULTIPLE CONCRETE FOUNDATIONS Gordon Jackson, Arup, United Kingdom |
BT2.1 |
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CONCEPTUAL FOUNDATION STUDY FOR KRIEGERS FLAK Göran Loman, Vattenfall, Sweden |
BT2.2 |
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INNOVATIVE OFFSHORE FOUNDATION SOLUTIONS Thomas Østergaard, Siemens Wind Power A/S, Denmark |
BT2.3 |
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KRIEGERS FLAK FOUNDATION CONCEPTS - THE DRILLED CONCRETE MONOPILE Maarten Van der Veen, Ballast Nedam Offshore, The Netherlands |
BT2.4 |
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A QUANTITATIVE COMPARISON OF THE RESPONSES OF THREE FLOATING PLATFORM CONCEPTS Jason Jonkman, National Renewable Energy Laboratory, United States of America |
BT2.5 |
Chairs:
Jos Beurskens, ECN, The Netherlands
Peter Hjuler, Risø DTU, Denmark
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Session description Among the wind energy community there is a common notion that dedicated offshore wind turbine designs are needed in order to realise the ambitious goals of various governments and the EU, and to make offshore wind energy more competitive. Currently, offshore wind turbines may be considered derivatives of wind turbines designed for land applications. Features of those dedicated offshore machines include, amongst others, lighter constructions, high speed rotors and design for reliability (simplicity). All of these aspects will be addressed in this session. Two of the presentations will discuss the first results of multi MW existing wind turbine types, which will provide very valuable input to the debate on reliability. Specific design issues for dedicated offshore wind turbines, including up-scaling, simplicity versus the need for load alleviation and harsh eternal conditions will also be presented in this session. Finally, the most important component of a wind turbine, the rotor, will be discussed in terms of making extreme lightweight blades and increasing the tip speed ratio, both of which are essential elements in realising cost reductions on the longer term. |
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LIGHT WEIGHT, HIGH SPEED ROTORS FOR OFFSHORE Peter Jamieson, Garrad Hassan, United Kingdom |
BT3.1 |
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THE BRITANNIA 10MW WIND TURBINE: INNOVATING DESIGN BUILDS COST-EFFECTIVE OFFSHORE TECHNOLOGY David Still, Clipper Windpower Marine, United Kingdom |
BT3.2 |
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AN IDEALISED OFFSHORE WIND TURBINE Poul Skjærbæk, Siemens Wind Power A/S, Denmark |
BT3.3 |
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TECHNOLOGY AND FIRST OPERATIONAL RESULTS OF THE WORLD'S LARGEST OFFSHORE WIND TURBINE REPOWER 6M Jens Goesswein, REpower Systems AG, Germany |
BT3.4 |
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PROJECT EXPERIENCES FROM THE FIRST 5MW OFFSHORE WIND TURBINE INSTALLATION IN THE OFFSHORE TESTFIELD "ALPHA VENTUS" Markus Eichler, ABB, Switzerland |
BT3.5 |
Chairs:
Dorte Buus Jensen, Vestas Offshore, Denmark
Jaco Nies, GE, Germany
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Session description Within the offshore wind business, an increased focus on reducing CoE and improving profitability has resulted in different approaches to decreasing operation and maintenance (O&M) costs. Understanding the environmental conditions under which such activities are performed, choosing the right service setup and service scheme given the individual site and a thorough knowledge of the wind turbines are keys to success. With wind farms being developed farther and farther offshore, the focus on O&M is growing. This session will elaborate on measures to bring O&M activities and costs under control, to the benefit of current and future wind farms. |
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OPERATION AND MAINTENANCE COST ESTIMATOR (OMCE) TO ESTIMATE THE FUTURE O&M COSTS OF OFFSHORE WIND FARMS Luc Rademakers, ECN, The Netherlands |
BT4.1 |
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CONDITION BASED MAINTENANCE OF VESTAS OFFSHORE TURBINES Jacob Juhl Christensen, Vestas Wind Systems, Denmark |
BT4.2 |
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NOVEL EARLY WARNING PROGNOSTICS FOR BEARINGS OF WTG GEARBOXES Jonathan Wheals, Ricardo UK Ltd, United Kingdom |
BT4.3 |
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OPERATION AND MAINTENANCE COSTS FOR FAR DISTANCE OFFSHORE WIND FARMS Wilhelm Heckmann, Germanischer Lloyd Industrial Services, Germany |
BT4.4 |
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THE OFFSHORE ACCESS PROBLEM AND TURBINE AVAILABILITY - PROBABILISTIC MODELLING OF EXPECTED DELAYS TO REPAIRS Julian Feuchtwang, University of Strathclyde, United Kingdom |
BT4.5 |
Chairs:
Stuart Herbert, New and Renewable Energy Centre Ltd (NaREC), United Kingdom
Peter Quell, REpower, Germany
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Session description The economic efficiency of offshore wind farms is highly dependent on the availability and reliability of installed wind energy converters. Due to the relative inaccessibility of offshore sites, maintenance and service works have a considerable influence on the operational costs of offshore wind farms. In order to minimise such financial impacts, risks should be identified, quality methods adapted and new technical solutions investigated. This session will present past experiences with onshore applications and will illustrate concepts and methods of reliability assessment and assurance, as well as highlighting examples of adapted technologies. |
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HOW DOES THE SWEPT AREA TO RATING RATIO IMPACT COST OF ENERGY FOR OFFSHORE WIND POWER? Anders Bach Andersen, Vestas Technology R&D, Denmark |
CT1A.1 |
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NEW TECHNIQUES OF RELIABILITY AND THEIR APPLICATION TO OFFSHORE WIND FARMS Michael Starling, BMT Fleet Technology Ltd, United Kingdom |
CT1A.2 |
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IMPROVED WTG GEARBOX RELIABILITY THROUGH NOVEL CONCEPTS FOR BEARINGS Jonathan Wheals, Ricardo UK Ltd, United Kingdom |
CT1A.3 |
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RELIABILITY OF OFFSHORE WIND TURBINES
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IDENTIFYING RISKS BY ONSHORE EXPERIENCE
Stefan Faulstich, ISET e.V., Germany |
CT1A.4 |
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RELIABILTY ASSESMENT AND IMPROVEMENT THROUGH ARM MODELLING Poul Skjærbæk, Siemens Wind Power A/S, Denmark |
CT1A.5 |
Chair:
Dolf Elsevier van Griethuysen, Ballast Nedam Offshore Energy, The Netherlands
Govert Hamers, European Technology Platform WATERBORNE
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Session description Europe, and especially its member states around the North Sea, has set itself a series of ambitious but serious targets in the offshore installation of wind turbines. To make this happen, many logistic and technical challenges are inevitably involved. These not only include a sufficient supply of suitable turbines and electricity cables, but also the related urgent need for sufficient, suitable and smart equipment to transport and install all of this from onshore to offshore locations. Not only are the number of installations per year expected to increase rapidly, but also the size of each unit. This consequently needs to be taken into account in designing technical solutions and in the choice of equipments to be used. In this session, the speakers will give us their views on how to approach these problems in a more conceptual way and will reveal multiple solutions for transporting and installing foundations, preassembled wind turbines and even a combination of the two. |
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NEW OFFSHORE WIND TURBINE INSTALLATION DEVICE DUBBED CASTORO VENTO Jacques Ruer, SAIPEM, France |
CT1B.1 |
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INNOVATIONS IN TRANSPORT AND INSTALLATION METHODS Henrik Lynderup, Siemens Wind Power A/S, Denmark |
CT1B.2 |
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OPTIMISATION OF THE OFFSHORE WIND FARM INSTALLATION PROCESS Aidan Cronin, Merchant Green, Denmark |
CT1B.3 |
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TRANSPORTATION AND INSTALLATION OF CONCRETE FOUNDATIONS Mark Willbourn, BMT Nigel Gee, United Kingdom |
CT1B.4 |
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LARGE SCALE ASSEMBLY AND ERECTION OF FLOATING OFFSHORE WIND TURBINES Anders Myhr, UMB, Norway |
CT1B.5 |
Chairs:
Mike Anderson, RES, United Kingdom
David Boye, DNV Wind Energy, Denmark
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Session description The economic viability of offshore wind project depends on many parameters. One of the most important is understanding the wave loading and its coupled interaction with the supporting structure. This session will present: • Innovative modelling techniques for assessing the impact of wave loading on the supporting structure. • The impact of misaligned wave loading on cross wind vibrations and its mitigation through the introduction of tower dampers. • The role certification and quality control/assurance plays in reducing risks to financers and developers. |
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COMPARING SOURCES OF DAMPING OF CROSS-WIND MOTION Niels Jacob Tarp-Johansen, DONG Energy, Denmark |
CT2.1 |
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WAVE RUN-UP: AN ENGINEERING MODEL Erik Asp Hansen, DNV Wind Energy, Denmark |
CT2.2 |
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VALIDATION OF OFFSHORE LOAD SIMULATIONS USING MEASUREMENT DATA FROM THE DOWNVIND PROJECT
Marc Seidel, REpower Systems AG, Germany |
CT2.3 |
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QUALITY CONTROL AND QUALITY ASSURANCE IN THE CONSTRUCTION OF OFFSHORE WIND FARMS – VESTAS OFFSHORE’S APPROACH Helle Malling, Vestas Offshore A/S, Denmark |
CT2.4 |
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NO OFFSHORE WIND FARM WITHOUT CERTIFICATION Matthias Laatsch, Germanischer Lloyd Industrial Services, Germany |
CT2.5 |