cutting edge > cLeAneR eneRgy 45
Wind BLAde issues As offshore wind turbine blades get larger, new methods are needed to assess the integrity and remaining life span of the blades. dnV initiated this research and innovation project and Joint industry Project (JiP) to develop best practices for composite blade integrity assessment. Matters Of siZe wind blades are tailored to the needs of wind turbines operating in areas with extreme weather conditions. with the increased length of offshore wind turbine blades has come a need to use advanced composite materials. Although these have proven a positive operational experience, a limited range of analysis and testing methods have been applied to the larger scale wind turbines. “As a natural consequence of the ambitious plans for renewable energy in many countries, we are seeing increasing projections on the amount of wind power being fed into the grid”, states Bjørn tore Markussen, Managing director of dnv’s clean technology centre (ctc) in Singapore. “the increased expectations for wind power generation have led to growth in wind turbine size, particularly in offshore wind. the technical and potential quality issues faced in such a rapid growth phase can be overcome by cross-industry collaboration to develop best practices, such as this project.” reDUCiNg risks WitH teaMWOrk dnv initiated this innovation project to develop improved integrity
© dnV/terje toftenes
S, S22 (Avg: 75%) +1.331e+02 +1.029e+02 +9.642e+01 +8.417e+01 +7.193e+01 +5.968e+01 +4.744e+01 +3.519e+01 +2.295e+01 +1.070e+01 -1.541e+00 -1.379e+01
assessment procedures for large scale offshore wind turbines in 2011, and joined an industry consortium on advanced composites in use. consortium partners include vestas, energy Research institute@ nanyang technological university and instron. Leveraging the experience of instron in bi-axial testing of composites with various flaws introduced, the expertise of dnv together with eRi@n in finite element analysis, and the knowledge of vestas in this industry, the project aims to provide insight into composite failure in wind turbine blades. with the results of the analysis, dnv will be developing integrity management procedures for advanced composite wind turbine blades. MOre ON OUr rOle the first phase of the JiP addresses development of bi-axial testing methods and finite element analysis procedures. these will enable development of test data for deriving and verifying models for flaw growth in the composites. Blade life predictions and integrity management procedures resulting from this project will reduce risk and improve predictability in this growing industrial sector. while dnv has been active in Singapore for over 40 years, their clean technology centre was only opened there in March 2010. now, with over 2,000 employees in 80 offices in the Middle east and Asia, dnv is positioned to meet growing demand for Risk Management services in South east Asia, including within green Shipping, Lng, carbon capture, Power/transmission and Renewables.
S, S22 (Avg: 75%) +1.331e+02 +1.029e+02 +9.642e+01 +8.417e+01 +7.193e+01 +5.968e+01 +4.744e+01 +3.519e+01 +2.295e+01 +1.070e+01 -1.541e+00 -1.379e+01
PRoJect MAnAgeR sØreN karkOV søren holds a Bsc degree in Mechanical engineering from the danish Academy in copenhagen. He is coming from a position as Vice President Field operation with Vestas America, where he among others was responsible for managing all aspects of construction and commissioning of large wind farms. For dnV, søren is providing advisory and consulting services with the renewable energy sector in the following areas: Project feasibility studies, technical due diligence, energy and performance modelling, utility grid interconnection studies, PV system design, and standards development and compliance assessment. søren has more than 25 years’ experience in the power sector, where he among other things has worked for ABB and Alstom Power. søren has also vast experience in project management.