Strategies to extend wind turbine lifetime

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Information about Strategies to extend wind turbine lifetime

Published on September 14, 2015

Author: IQPCGermany

Source: slideshare.net

1. Strategies to Extend Wind Turbine Lifecycles E/E Systems and drivetrains for wind energy - a fateful couple. One cannot exist without the other and both need to be adapted in such a way as to complement each other and run smoothly! This will not only ensure high performance, but also make sure that the complete wind turbine will last longer - even at peak performance! This exclusive industry article takes a closer look at the various strategies and innovations that are being applied and developed. Read on to find out more on to increase your wind turbine’s life-cycle! Extending Turbine Lifecycles Windturbinesinthepasthavetypicallybeendesigned for a service life of 20 years, but the extension of this lifetime to 25 or even 30 years will have a significant effect on CoE. However, with the wind industry still in its infancy, this step-change will be based on new ideas and innovation just as much as real-life data and experience. Thereareexamplesofkilowatt-ratedonshoreturbines that outlasted their 20-year lifecycle from the 1970’s to 1990’s, but many early turbines were replaced by increased capacity models before reaching their full lifetime. This demand for ever-increasing capacities made it all the more difficult for designers to gain data and experience from larger-series turbines. While the onshore market may have levelled out to a degree in terms of capacity – the majority of large onshore turbines are rated in the 1-3MW range – the offshore market continues to demand larger turbines to meet strict targets for 2020 and beyond. The lifecycle of these turbines, which will be rated from 6MW to 10MW or more, takes on much more importance in an offshore environment. The initial cost of the turbine makes up approximately just a third of the total capital cost, and with such high installation and operation and maintenance costs, it is essential to develop turbine platforms with a longer life expectancy to help reduce the overall CoE over the entire lifecycle. Industry article A report released earlier this year – The Cost Reduction Monitoring Framework (CRMF) – showed that the cost of energy from wind farms in UK waters has dropped by 11% over the last three years. The report charted cost reduction progress from 2011 to 2014, and is measured in lifetime costs. It was delivered by ORE (Offshore Renewable Energy) Catapult in collaboration with the Crown Estate, and demonstrated that the UK wind industry is on course to meet its target cost of £100/MWh by 2020. The report highlights that: • The lifetime cost of energy from offshore wind farms has been reduced from £136/MWh in 2011 to £121/MWh for projects moving to construction between 2012 and 2014. Crucially, these figures are measured across the whole lifetime of a project, not just the 15 years covered by Government strike prices. • The biggest single contribution to cost reduction has been the early adoption of larger, higher rated turbines. A reduction in the cost of energy is the driving factor behind development and innovation both offshore and onshore, and extending the overall operating lifecycle of a turbine is a clear way to reduce Cost of Energy (CoE). ”The demand for ever- increasing capacities made it all the more dif- ficult for designers to gain data and experience from larger-series turbines.” www.ee-wind-turbines.com www.wind-drivetrain.com

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