MEDAL WINNERS<\/p>\n
GEs 12MW Haliade-X direct-drive prototype was installed in the second half of 2019 in the Dutch port of Rotterdam.<\/p>\n
This groundbreaking new offshore turbine sets several new wind industry standards.<\/p>\n
First is the huge permanent ring generator, with a diameter of around 11 metres.<\/p>\n
Second is the rating of 12MW, although the prototype permitting documents refer to 12-14MW, and well-informed sources claim the turbine is already being offered at the 14MW level.<\/p>\n
Third is the 220-metre rotor 218.2 metres according to the permitting documents a world record in either case.<\/p>\n
The 107-metre blades weigh 55 tonnes each, which, with the 600-tonne nacelle mass quoted in the permitting documents, adds up to a total head mass of 850-875 tonnes.<\/p>\n
The Haliade-X features a state-of-the- art rotor and generator-rotor support solution that comprises a main bearing unit with a hollow shaft for easy hub service access, and two pre-stressed taper-roller bearings.<\/p>\n
The latter is a departure from the \"pure torque\" solution deployed in the 6MW Haliade, but provides a similar air gap stability levels, according to GE.<\/p>\n
The rated rotor speed is 7.81rpm, which for a 218.2-metre rotor diameter corresponds to an 89.2m\/s rated tip speed, and represents a good compromise between aerodynamic performance and curbing blade leading-edge erosion risk.<\/p>\n<\/p>\n
SILVER Siemens Gamesa SG 11.0-193 DD Flex<\/p>\n
The latest variation of SGREs offshore platform builds on a 1,000 direct-drive track record, with the recently announced upgrade to 11MW already winning a 140-unit contract.<\/p>\n
The upgrade narrows the gap to GEs 12MW Haliade-X, and commercial production is due to start in 2022.<\/p>\n
The turbines compact \"box-type\" nacelle enables easier manufacture and transport. Other features include an enlarged generator and 94-metre rotor blades made from C&GFRE.<\/p>\n
A key overall objective was creating an optimal setup for utilising the existing mature supply chain, with additional cost savings through reuse of SGREs blade and nacelle factories.<\/p>\n
The 11MW turbine has a specific power rating of 376W\/m2, against 365W\/m2 for the current SG 8.0-167 volume product, both designed for high-wind North Sea applications.<\/p>\n<\/p>\n
BRONZE Dongfang D10000-185<\/p>\n
The typhoon-resistant direct-drive D10000-185 for high wind and IEC I\/S has a 185-metre rotor diameter and was the first 10MW Chinese turbine to be announced.<\/p>\n
The fully enclosed outer-rotor generator operates at 3.15kV medium-voltage level, against the wind industrys semi-standard of around 1kV.<\/p>\n
Together with IGCT-based power electronics , this offers an efficiency improvement of 1-3% compared to low voltage, claims Dongfang.<\/p>\n
The 10MW design builds on a 1,200-turbine onshore direct-drive track record, encompassing 3.XMW and the latest 4.XMW platforms.<\/p>\n
The in-house manufactured blade features carbon in the structural main beam for a favourable 34-35-tonne mass for a 90-metre unit designed for IEC I (S) loads. Eight pre-series turbines are planned for 2020, with the next envisaged scaling step taking the machine to 12-15MW with a 230-metre rotor.<\/p>\n<\/p>\n
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Link:<\/p>\n
Turbines of the year 2019: Offshore turbines - Windpower Monthly<\/a><\/p>\n","protected":false},"excerpt":{"rendered":" MEDAL WINNERS GEs 12MW Haliade-X direct-drive prototype was installed in the second half of 2019 in the Dutch port of Rotterdam. This groundbreaking new offshore turbine sets several new wind industry standards Continue reading