39 Senvion Presents Its Highest Yield Onshore 40 Energy Department Awards $1.8 Million To Develop MANUFACTURING Production • Fabrication • Components • Supply Chain • Materials • Tooling • Machinery MOVENTAS EXCEEDS HIGH TORQUE DENSITY WITH 3-MW GEARBOX

The Exceed is a 3-MW, up-product platform with a Compared to a conventional Moventas 3-MW gearbox, high-quality weight and nominal torque ratio. The the Exceed is nearly 4.5 tons lighter, weighing less Exceed provides 20-percent more torque density than 20 tons. Despite the lighter weight, no quality with 10-percent less size and consists of 100-percent compromises have been made. proven Moventas technology. Testing and verification The Exceed’s overall noise levels are quieter on both showed that torque density improvement was even partial and nominal powers. Its maximum vibration more significant than expected, exceeding 140 Nm/kg. level is half the level of a conventional 3-MW gearbox. “We took measured gearbox values of the technol- In addition to the increased performance, tests also ogy we’ve been using for a decade and recalculated showed improved reliability. them with new design methods,” said Moventas’ CTO Supervised by a classification body, Moventas Jyrki Virtanen. “As a result, one gets more torque out finished the successful prototype verification pro- of a smaller, more lightweight gearbox. This positively cess two weeks ago. Serial deliveries of the Exceed affects the levelized cost of wind energy.” will begin in Q1/2016 for two OEM customers from In addition to the superior torque density, the Moventas’ highly modern MMW wind gearbox factory Exceed’s other major improvements contributing to in Finland. turbine competitiveness include lower weight, smaller size, and best-in-class noise and vibration behavior. — Source: Moventas

38 OCTOBER | 2015 Wind Turbine Blades

SENVION PRESENTS ITS HIGHEST YIELD ONSHORE WIND TURBINE

The Senvion 3.4M140 is equipped with a sound-optimized The mass-produced optimized blade profile with blade profile and a new pitch control system to integrated serrations also reduces the sound power reduce turbine load. The Senvion 3.4M140 will be level of wind turbines. available in 2018 with hub heights of 110 and 130 “Wind energy is part of our future,” Nauen said. meters. The longer 68-meter blades at these tower “Further developments such as serrations are a heights alone permit high yields at low-wind loca- big step forwards and even allow larger turbines tions such as forested and mountainous areas. to adapt to our requirements. Despite its size, the “Wind energy is competitive in the most diverse Senvion 3.4M140 will be one of the quietest turbines of places,” said Senvion CEO Andreas Nauen. “By on the market and we will continue to optimize this offering wind turbines with longer rotor blades that technology.” can be operated even more profitably and cost-effi- Senvion will install the prototype in 2017. ciently at great heights, Senvion is proving that even The Senvion 3.4M140 is equipped with the Next low-wind locations inland can be attractive.” Electrical System (NES), which Senvion introduced Compared with the 3.0M122, the 3.4M140 gener- for its 3.XM series at the Hannover Messe 2015. The ates up to 20-percent greater yields, depending on gearbox-based concept, which features an asynchro- the location. A load-reducing pitch control system nous generator and a fully rated converter, per- ensures a cost-efficient design. The service life is mits stable grid feed-in and already meets the grid also extended to 25 years. This further development requirements in the various markets for 2017 ahead is making a major contribution to reducing the lev- of time. elized cost of energy and to the competitiveness of wind energy. — Source: Senvion

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windsystemsmag.com 39 MANUFACTURING

ENERGY DEPARTMENT AWARDS $1.8 MILLION TO DEVELOP WIND TURBINE BLADES

NREL / Iberdrola Renewables

The Energy Department recently The two research and devel- constraints while meeting structural announced the selection of two opment projects will address the requirements for next-generation organizations to develop larger challenges of manufacturing, trans- turbines. GE will gather input and wind turbine blades that can take porting, assembling, and installing engage the industry to facilitate advantage of better wind resources rotor blades longer than 60 meters technology transfer as jointed blades and can lower costs. using design concepts scalable to are introduced in the United States. Technological innovations such greater lengths. This effort is part of the Depart- as taller wind turbine towers and Wetzel Engineering, Inc. of ment’s Clean Energy Manufacturing larger rotors can more efficient- Pflugerville, Texas, in partnership Initiative, which aims to increase ly capture the stronger and more with the Energy Department’s Na- American competitiveness in the consistent wind resources typically tional Laboratory production of clean energy prod- found at greater heights above (NREL), , ucts and boost U.S. manufacturing ground level. This past May, the TPI Composites, and NextEra, will competitiveness across the board by Energy Department released a new develop a field-assembled blade increasing energy productivity. report highlighting how the United called “SparBladeTM” using a light- The Energy Department’s Office States can unlock the vast potential weight bonded composite space of Energy Efficiency and Renewable for wind energy deployment in all frame. Between 62–74 meters, this Energy accelerates development and 50 states, made possible through new technology is intended for deployment of energy efficiency continued innovations in next-gen- operation on multi-megawatt wind and renewable energy technologies eration components like these. turbines and tall towers. The new and market-based solutions that In addition to accessing better technology is expected to create a strengthen U.S. energy security, en- wind resources, another focus of higher performance, lower weight, vironmental quality, and economic this research involves lowering and lower cost wind turbine blade vitality. Go to www.energy.gov to blade weight and improving de- with significantly reduced trans- learn more about the Wind Pro- sign to help the industry reduce portation costs. gram’s research and development production costs. This will also GE, in partnership with NREL efforts to advance wind turbine and help lower transportation costs and TPI Composites, will design a component manufacturing. for installing these very large jointed blade for onsite assembly components. to reduce transportation logistical — Source: DOE

40 OCTOBER | 2015