4 MW Offshore Unit
Siemens Energy has launched a new offshore wind turbine, which features a generating capacity of 4 MW and a rotor diameter of 130 meters.
The new SWT 4.0-130 wind turbine joins Siemens’ 3.6 MW turbines as part of the company’s G4 geared-drive platform series. The nacelle and tower of the SWT 4.0-130 are variants of those used in the 3.6 MW wind turbine design, Siemens says. The rotor blades are manufactured using the company’s IntegralBlade process, in which they are cast in a single piece without the use of adhesive bonding.
The new B63 rotor blade, which measures 63 meters in length, sweeps an area equivalent almost to the size of two football fields, according to Siemens. Thanks to optimized coupling of blade bending and twisting, these aeroelastic blades react more flexibly to high wind loads, the company adds.
In December 2012, a SWT 4.0-130 prototype was installed and commissioned at the Osterild Test Center in Denmark. Serial production of the turbine is expected to commence in 2015.
Siemens also announced that in the future, each of its wind turbines will belong to one of the following platforms: Siemens G2, Siemens G4, Siemens D3 or Siemens D6. Platforms based on geared technology are denoted by the letter “G” (for “geared drive”), while product platforms featuring gearless technology are identified by the prefix “D” (for “direct drive”).
Risk Model Explores
Normandeau Associates Inc. says it has developed a spatial avian- and bat-collision-risk model for wind resource areas in the central U.S.
Wildlife managers, government agencies and wind energy developers can use this tool to conduct large-scale pre-construction studies and assist with federal and state regulatory compliance, the company says. Normandeau created and tested this empirical collision-risk model during a two-and-a-half-year project funded by the U.S. Department of Energy.
“The collision-risk model was based on identifying each species’ preferred habitat and other environmental conditions that would increase exposure to wind turbines, such as weather and topography in the landscape,” explains Dr. Greg Forcey, Normandeau project manager and senior ecologist.
Potentially risky behaviors (e.g., migratory or mating display flights) are factored into the model, creating a spatiotemporal prediction of when and where particular species would be most at risk from collision.
The study examined landscape-level influences using a hierarchical spatial model, combined with existing data sets and life history knowledge, for six bird and three bat species (horned lark, red-eyed vireo, mallard, American avocet, golden eagle, whooping crane, eastern red bat, hoary bat and silver-haired bat) in the Upper Great Plains region.
Normandeau evaluated the tool’s effectiveness by comparing model predictions with available mortality data for four focal species – horned lark, eastern red bat, silver-haired bat and hoary bat. For the three bat species, there was a 90% correlation between existing post-construction mortality data and predicted risk, and for the horned lark there was a 55% correlation, Normandeau says.
“Based on model results, developers can make informed large-scale decisions about wind turbine siting – ensuring the best outcomes for the wind industry, the public and wildlife,” Forcey says.
A Web-based interface allows users to identify higher-risk locations for the nine species studied. The tool can be adapted for other species and habitats in different geographic areas if desired.
Moventas Aims To
Cut Service Time
Wind and industrial gear manufacturer Moventas has launched new custom-built mobile service units for wind gears.
The entire helical side of the gearbox can be repaired up-tower, thus shortening repair times and eliminating the need to ship gears to and from service centers, the company explains, adding that fewer lifts and smaller components reduce weather delays.
Moventas launched its up-tower repair service last year and now offers full helical up-tower service on both Moventas gears and non-Moventas gears. Designed to support Moventas’ up-tower field-service program, the self-contained, climate-controlled mobile workshops are outfitted with a retractable roof, a power generator, plumbed air lines, a parts wash basin and an induction heater.
In the case of a full helical repair, each gearbox Moventas services up-tower is equipped with CMaS, the company’s condition management system. CMaS performs vibration analysis and tracks changes in oil condition and particle counts every 15 minutes, allowing it to catch potential problems, the company explains. CMaS data is analyzed remotely by Moventas’ engineers, who then alert customers about potential problems before they occur.
New Turbine Series
Nordex SE has unveiled the fourth generation of its multi-megawatt wind turbines. Called “Generation Delta,” the series includes new versions of the company’s N117/3000 3.0 MW turbine and N100/3300 3.3 MW machine.
The N117/3000 features a 20% increase in nominal output over the previous version of the turbine and is designed for medium wind speeds. For the new version of the turbine, Nordex increased the rotor diameter by 17 meters, which the company says resulted in an increase of about 37% in the rotor sweep and a 10% jump in full load hours.
Meanwhile, the N100/3300 has an installed capacity of 3.3 MW and is designed for high wind speeds. It has a rotor diameter 10 meters larger than its predecessor, driving the swept area of the rotor up by 23%, Nordex says.
In addition, the Generation Delta’s turbines come with taller hub heights per wind class, the company says. Therefore, for the first time, Nordex is offering a steel tube tower with a hub height of 120 meters for medium-wind-speed locations. The N100/3300 is now also available on a steel tube tower, with a hub height of 100 meters, for strong-wind sites.
Nordex notes that the Generation Delta turbines come with the company’s anti-icing system for the blades, fitted to the N117/3000 and the N100/3300. The system heats the aerodynamically most important surfaces of the rotor blades, thus reducing ice formation, the company explains.
Nordex will begin delivering Generation Delta turbines at the beginning of 2014.
3 MW Turbine
Wind turbine manufacturer Alstom has upgraded its 3 MW onshore ECO 100 platform, which was originally designed for medium- and high-wind sites, to also be appropriate for use at low-wind sites.
According to Alstom, the upgrade increases the turbine’s net capacity factor by up to 48%. The ECO 100 turbine comes with a rotor diameter of either 100, 110 or 122 meters, thus allowing developers to select the best rotor location for each specific site, Alstom notes.
Acciona Windpower has unveiled a new 125-meter rotor for its AW3000 3 MW wind turbine.
The AW 125/3000 model combines a 125-meter rotor with the AW3000 3 MW wind turbine generator and Acciona’s 120-meter concrete tower to improve the turbine’s performance at low-wind sites, the company says, adding that the 125-meter rotor captures wind energy from a swept area of over 12,300 square meters.
Acciona will complete the design certification for the new rotor this year, and the first blades are expected to be installed by the end of the year. The AW 125/3000 will be available for delivery in 2014 for both 50 Hz and 60 Hz markets.
GE Rolls Out Turbine
For Low-Wind Sites
GE Energy has introduced a 2.5 MW wind turbine that operates at low-wind-speed sites, yielding a 25% increase in efficiency and a 15% increase in power output compared to its current model, according to the company.
GE says the turbine’s controls enable the use of a 120-meter rotor, resulting in increased energy capture and greater power output in low-wind areas. The taller tower, which has a maximum hub height of 139 meters, makes it ideal for heavily forested regions in places such as Europe and Canada.
The 2.5-120 also minimizes sound emissions to meet the strictest noise requirements through advanced controls technology. In addition, the new wind turbine is optimized for IEC Wind Class III and DIBT WZ2 standards. The 2.5-120 is available for 50 Hz and 60 Hz applications.
Cooper Roller Bearings says it has increased the load capacities of many of its split roller bearings. According to the company, the new 01E and 02E bearings are fully interchangeable with its Cooper 01 and 02 Series bearings and provide up to 29% more radial capacity and 16% to 90% more axial load capacity.
Like all Cooper split roller bearings, the 01E and 02E Series are completely split to the shaft, which eliminates the need to disassemble all components on a shaft for service or replacement, the company explains.
The increased life and capacities of the 01E (medium-duty) and 02E (heavy-duty) bearings are due primarily to changes in internal geometry, Cooper Roller Bearings notes, adding that rugged brass cages make the 01E and 02E bearings suitable for underground applications and other challenging environments.
The new design is now available in medium-duty and heavy-duty bearings with bore sizes ranging from 6.5 inches to 12 inches (160 mm to 300 mm).
Alignment Supplies Inc. has released a new application for its ALiSENSOR Level geometric measurement system.
The new app, called “Flatness,” is designed to enable users to measure the flatness of surfaces of a wide range of shapes and sizes through the ability of the ALiSENSOR Level to be calibrated to user-made fixtures of all sizes, the company explains.
The ability to customize the number of measurement points along both axes also enables users to perform detailed flatness measurements, while allowing them to customize the number of measurement points for specific applications, such as performing a flatness measurement on two rails for a motor or pump installation, Alignment Supplies says.
The user is guided in every step by a live 3D model of the measurement. When the flatness measurement is completed, the user can choose reference points, and a PDF report can be created instantly with all the measurement data, including an adjustable-scale schematic drawing of the flatness results. A table with the values of all measurement points is also included in the report, as well as the minimum value, maximum value and total flatness value between the highest and lowest points.
The app can be downloaded for free from the Apple App Store.
Products & Technology
Siemens Launches 4 MW Offshore Unit
NAW_body NAW_body_bi NAW_body_b_i NAW_body_bNAW_body_i