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News from the CE Joint Industry Project ENERGY News from the ♠CE Joint Industry Project Alleviating Cyclone and Earthquake Challenges for Wind Farms Global Offshore Wind Summit Taiwan Marcus Klose 14 October 2020 1 DNV GL © 14 October 2020 SAFER, SMARTER, GREENER Outline 01 Introduction 02 Background / Motivation 03 The JIP concept 04 Project status 05 Summary / Outlook 2 DNV GL © 14 October 2020 Challenge: Agree on industry approach how wind turbine structures should be designed for Cyclones and Earthquakes 3 DNV GL © 14 October 2020 How it started… 4 DNV GL © 14 October 2020 Challenges of the customer / pains 5 DNV GL © 14 October 2020 How Might We deal with tropical cyclone 6 DNV GL © 14 October 2020 How Might We deal with seismic impact 7 DNV GL © 14 October 2020 Backgrounds and pains – design of offshore wind turbines in new markets Earthquakes . Uncertainty in design conditions: geotechnical conditions, combination of wind and earthquake loads. Inconsistency in approaches used to design for earthquakes. International / local codes & standards not sufficiently detailed / harmonized Cyclones . Uncertainty in extreme wind speed. Uncertainty in transferring local building code requirements to large offshore turbines . Detailed modelling is expensive and uncertain. Lack of measurements available for calibration/verification of detailed models. Statistical treatment is difficult. 8 DNV GL © 14 October 2020 Why a JIP? Designers Developers and Authorities Certification bodies Manufacturers owners Minimize cost, warranty and liability risk Optimize for seismic and typhoon conditions at an early stage Balance between safety and cost Understand safety level and the risk associated 9 DNV GL © 14 October 2020 JIP hypothesis – what we understood . Timeline is important . Both seismic and typhoon challenges are equally important, but stakeholders may have a focus on only one of them . Many projects/stakeholders in new markets suffer from similar issues . Common interest to achieve a joint solution in order to obtain clarity and acceptance . No need for new or additional research, but for consensus on how to use existing knowledge. Strong focus on Taiwan, US and Japan . Important to involve local specialists 10 DNV GL © 14 October 2020 Partners and consultants 11 DNV GL © 14 October 2020 Work packages for cyclone workstream (overview) . Task C1 Critical review of available cyclone measurements ( JMA, …) and state-of-the-art modelling (analytical models, hybrid models, WRF, …) . Task C2 Selection of a few well documented cyclones / locations and models to be studied, covering sites with no/weak land interaction as well as sites with strong land interaction . Task C3 Benchmarking of selected models based on measurements (work-in-kind contributions possible and desired). Task C4 Quantification of strength, weakness and limitation of today’s cyclone models. Task C5 Endorsement of engineering models (different models for sites with and without land interaction) and if possible – design wind speed maps – guidance on velocity profiles, turbulence levels etc. 12 DNV GL © 14 October 2020 Ongoing studies Typhoon measurements from Taiwan and Japan, comparison with predictions Typhoon Megi, September 2016 Typhoon Dujuan, September 2015 Typhoon Hagibis, October 2019 Max. windspeed (1min) 130 mph Max. windspeed (1min) 150 mph Max. windspeed (1min) 160 mph Source: https://en.wikipedia.org/wiki/Typhoon_Hagibis https://en.wikipedia.org/wiki/Typhoon_Megi_(2016) https://en.wikipedia.org/wiki/Typhoon_Dujuan_(2015) 13 DNV GL © 14 October 2020 Work packages for seismic workstream (overview) . WP E1: Summary of existing standards and methods (ISO, IEC, local codes, response spectrum, time domain) . WP E2: Geotechnical challenges – damping and liquefaction . WP E3: Benchmarking of different approaches (time vs frequency domain, integrated vs submodel approach) for different turbine and foundation types . WP E4: Calibration and validation, defining limitations of simplified methods . WP E5: Development of process description including interface definition, required input, … 14 DNV GL © 14 October 2020 Proposal for updated planning - E3 case studies Starting point: 15 DNV GL © 14 October 2020 Update on time schedule 2019 2020 Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Okt Nov WP C-1 WP C-2 WP C-3 WP C-4 WP C-5 WP E-1 WP E-2 WP E-3 WP E-4 WP E-5 13/14th May Workshop Midterm Workshop Hamburg Hamburg Sept.23rd/24th Workshop Projectt Closing Workshop (Online) (Online) Workshop Closing Projectt 16 DNV GL © 14 October 2020 Summary and outlook . The ACE Joint Industry Project is an initiative organized by DNV GL with support from >20 major wind industry stakeholders. Main task: Agree on industry approach on how wind turbine structures should be designed for cyclone and earthquake impact . The project kicked-off end of 2019 and is expected to be finalized by end of 2020. The project results are confidential and jointly owned by the project partners. DNV GL’s Recommended Practices based on the JIP results to be available in 2021. – Provide guidance for transfer of the results to local standards and benefit for current and future projects. 17 DNV GL © 14 October 2020 Thank you for your attention Marcus Klose [email protected] +49 40 36149 7143 www.dnvgl.com The trademarks DNV GL®, DNV®, the Horizon Graphic and Det Norske Veritas® SAFER, SMARTER, GREENER are the properties of companies in the Det Norske Veritas group. All rights reserved. 18 DNV GL © 14 October 2020.
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