WindTwentyone
Hi-Tech
Stylish
Made in Italy
Wind Power
Wind Energy history
Mechanical Power
The first windmills were in use in Persia at least by the 9th century and possibly
as...
Wind Energy history
Electrical Power
In July 1887, a Scottish academic, Professor James
Blyth, built a cloth-sailed wind t...
Wind Energy history
Electrical Power
By the mid-1920s, 1 to 3 kW wind generators
developed by companies such as Parris-Dun...
Energy production
Electricity can be generated in many ways.
In each case, a fuel is used to turn a turbine, which drives ...
Wind Speed Worldwide
Wind Energy basics
Wind energy is the kinetic energy of air in motion. Total wind energy flowing
through an imaginary area...
Wind Energy basics
Betz' Law
Betz' law says that you can only convert less
than 16/27 (or 59.26%) of the kinetic energy in...
WindTwentyon
e
Win-D4
Hi-Tech
Hi-Speed
Vertical Axis Wind
Turbine
Passion for innovation
Technical Team from aerospace, racing and naval
sectors
Deep knowledge of hi-tech materials
Continu...
Blades rotate around a vertical axis rather than a
horizontal one.
Win-D4 covers a much smaller swept area while
keeping h...
Win-D4 Vertical Axis Wind
Turbine
GENERAL DATA
Width [m] 2
Height [m] 3,3
Swept Area As [m2] 6,6
Weight [kg] 250
Blades ma...
Win-D4 Vertical Axis Wind
TurbinePERFORMANCE DATA
Rated Power Pn [ kW] 3,5
Rated Wind Speed [m/s] 14
Rated RPM 350
Cut-in ...
Weibull distribution
Wind roseWind statistical distribution
Win-D4
Expected Annual Power Output
Win-D4
Expected Annual Power Output
Win-D4
Applications
Win-D4
Media
Win-D4
Contacts
Wind Twentyone Ltd
Sales Department
39 New Cavendish Street
W1G 9TN London (UK)
Tel +44 - 020 - 7224 0388
...
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Wind Twentyone

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Wind Twentyone designs, develops and manufactures vertical axis wind turbines (VAWT) with innovative design and features cutting-edge techniques and materials.

All research and development and production, as well as the materials, are 100% made in Italy.

Published in: Technology, Business
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Wind Twentyone

  1. 1. WindTwentyone Hi-Tech Stylish Made in Italy Wind Power
  2. 2. Wind Energy history Mechanical Power The first windmills were in use in Persia at least by the 9th century and possibly as early as the 7th century. By 1000 AD, windmills were used to pump seawater for salt-making in China and Sicily. Windmills were used extensively in North-western Europe to grind flour from the 1180s, and wind-pumps were used to drain land for agriculture and for building.
  3. 3. Wind Energy history Electrical Power In July 1887, a Scottish academic, Professor James Blyth, built a cloth-sailed wind turbine in the garden of his holiday cottage in Marykirk and used the electricity it produced to charge accumulators which he used to power the lights in his cottage. His experiments culminated in a UK patent in 1891. In 1887–1888, US inventor Charles F. Brush produced electricity using a wind powered generator which powered his home and laboratory. In the 1890s, the Danish scientist and inventor Poul la Cour constructed wind turbines to generate electricity, which was used to produce hydrogen and oxygen by electrolysis and a mixture of the two gases was stored for use as a fuel. In 1904, La Cour founded the Society of Wind Electricians.
  4. 4. Wind Energy history Electrical Power By the mid-1920s, 1 to 3 kW wind generators developed by companies such as Parris-Dunn and Jacobs Wind-electric found widespread use in the rural areas of the mid-western Great Plains of the US. In 1931, the French aeronautical engineer, George Darrieus was granted a patent for the Darrieus wind turbine, which uses vertical-axis airfoils to create rotation and a 100 kW precursor to the modern horizontal wind generator was used in Yalta, in the USSR. In 1956 Johannes Juul, a former student of la Cour, built a 200 kW, three-bladed turbine at Gedser in Denmark, which influenced the design of many later turbines. In 1975 the United States Department of Energy funded a project to develop utility-scale wind turbines. The NASA wind turbines project built thirteen experimental turbines which paved the way
  5. 5. Energy production Electricity can be generated in many ways. In each case, a fuel is used to turn a turbine, which drives a generator, which feeds the grid. The turbines are designed to suit the particular medium characteristics. Wind generated electricity is no different: the wind is the medium, which drives the turbine, which generates electricity. But unlike fossil fuels it is free and
  6. 6. Wind Speed Worldwide
  7. 7. Wind Energy basics Wind energy is the kinetic energy of air in motion. Total wind energy flowing through an imaginary area A during the time t is: E = ½mv2 = ½(Axvxtxρ)v2 =½Axtxρxv3 Where - ρ is the density of air; v is the wind speed - Axvxt is the volume of air passing through A (perpendicular to the direction of the wind) - Axvxtxρ is the mass m passing per unit time Power is energy per unit time, so the wind power incident on A is: P = E/t = ½Axρxv3 Wind power is proportional to the third power of the wind speed; the available power increases eightfold when the wind speed doubles. Wind turbines therefore need to be especially efficient at greater wind speeds.
  8. 8. Wind Energy basics Betz' Law Betz' law says that you can only convert less than 16/27 (or 59.26%) of the kinetic energy in the wind to mechanical energy using a wind turbine. Pmax = 0,5926x½Axρxv3
  9. 9. WindTwentyon e Win-D4 Hi-Tech Hi-Speed Vertical Axis Wind Turbine
  10. 10. Passion for innovation Technical Team from aerospace, racing and naval sectors Deep knowledge of hi-tech materials Continuous improvements Big investments Five years R&D Three exclusive patents Padua University partnership Win-D4
  11. 11. Blades rotate around a vertical axis rather than a horizontal one. Win-D4 covers a much smaller swept area while keeping high power output. Win-D4 functionality is independent from the direction of the wind. It does not need a positioning system. Win-D4 has a low noise level and its stylish and pleasing to the eye design allows wonderful urban areas installations. Win-D4 Vertical Axis Wind Turbine
  12. 12. Win-D4 Vertical Axis Wind Turbine GENERAL DATA Width [m] 2 Height [m] 3,3 Swept Area As [m2] 6,6 Weight [kg] 250 Blades material Carbon Fiber Breaking system 1 Electro mechanic Breaking system 2 Electric Win-D4 shipment requires a standard container
  13. 13. Win-D4 Vertical Axis Wind TurbinePERFORMANCE DATA Rated Power Pn [ kW] 3,5 Rated Wind Speed [m/s] 14 Rated RPM 350 Cut-in Wind Speed [m/s] 5 Start Wind Speed [m/s] 5 Cut-Off Wind Speed [m/s] 25 Survival Speed [m/s] 50 Expected Lifetime [years] >25 Noise [dB] 70 (@ 1 m dist.)
  14. 14. Weibull distribution Wind roseWind statistical distribution Win-D4 Expected Annual Power Output
  15. 15. Win-D4 Expected Annual Power Output
  16. 16. Win-D4 Applications
  17. 17. Win-D4 Media
  18. 18. Win-D4 Contacts Wind Twentyone Ltd Sales Department 39 New Cavendish Street W1G 9TN London (UK) Tel +44 - 020 - 7224 0388 Wind Twentyone S.r.l. Engineering & Production Via Makallè, 97 35138 Padova (I) Tel +39 - 049 - 631652 www.wind-21.com info@wind-21.com

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