Number by catalogue:  Yvert: 1457   Scott: 1374  

Perforation type: 13 ¼x13

Subject:

4,5 crowns. Askov wind turbine, 1891 year

Topics: Wind turbines

Number by catalogue:  Yvert: 1458   Scott: 1375  

Perforation type: 13 ¼x13

Subject:

4,75 crowns. Gedser wind turbine, 1957 year

Additional:

The innovative 200 kW Gedser wind turbine (35K JPEG) was built in 1956-57 by J. Juul for the electricity company SEAS at Gedser coast in the Southern part of Denmark.
The three-bladed upwind turbine with electromechanical yawing and an asynchronous generator was a pioneering design for modern wind turbines, although its rotor with guy wires looks a bit old fashioned today. J. Juul invented the emergency aerodynamic tip brakes which were released by the centrifugal force in case of over speed. Basically the same system is used today on modern stall controlled turbines. The turbine, which for many years was the world's largest, was incredibly durable. It ran for 11 years without maintenance.

The Gedser wind turbine was refurbished in 1975 at the request of NASA which wanted measurement results from the turbine for the new U.S. wind energy programme.
The machine ran for a few years with test measurements after which it was dismantled. The nacelle and rotor of the turbine are now on display the Electricity Museum at Bjerringbro, Denmark.

Topics: Wind turbines

Number by catalogue:  Yvert: C1458   Scott: 1375  

Perforation type: 13 ¼x13

Subject:

The booklet contains 10 stamps on 4,75 crones. On a cover - stamp, last years and modern photos of wind generator, the short description.

Topics: Wind turbines

Number by catalogue:  Yvert: 1458   Scott: 1375a  

Perforation type: 13 ¼x13

Subject:

The small sheet includes 8 stamps and the label with the drawing of the external mechanism

Topics: Wind turbines

Number by catalogue:  Yvert: 1459   Scott: 1376  

Perforation type: 13 ¼x13

Subject:

6 crowns. Bogø island wind turbine, 1989. The manufacturer - Vestas Wind Systems A/S*

Additional:

*Vestas is a Danish company that designs, manufactures, sells, erects and services wind turbines. Founded in 1945 by Peder Hansen from the small town of Lem with the name Vestjysk Stålteknik A/S (West-Jutlandish steel technology), as a manufacturer of household appliances, the company progressed to the manufacture of agricultural equipment in 1950, intercoolers in 1956, hydraulic cranes in 1968, and began the manufacture of wind turbines in 1979.

In 2003, the company merged with the Danish wind turbine manufacturer NEG Micon to create the largest wind turbine manufacturer in the world under the name Vestas Wind Systems A/S. Vestas has installed turbines in 60 countries and employs more than 15,000 people globally.

The intercoolers (or "Charge air coolers") continue to be manufactured in Lem by Vestas aircoil A/S who split away from the wind systems company in the 80's.

Topics: Wind turbines

Number by catalogue:  Yvert: C1459   Scott: 1376  

Perforation type: 13 ¼x13

Subject:

The booklet contains 10 stamps on 6 crones. On a cover - stamp, 2 photos of wind generator, the short description.

Topics: Wind turbines

Number by catalogue:  Yvert: 1459   Scott: 1376a  

Perforation type: 13 ¼x13

Subject:

The small sheet includes 8 stamps and the label with the drawing of the external mechanism and wind turbine finding district map

Topics: Wind turbines

Number by catalogue:  Yvert: 1460   Scott: 1377  

Perforation type: 13 ¼x13

Subject:

8,25 crowns. Sea wind turbines, 2000, the Part of offshore wind power station Middelgrunden*

Additional:

*In March 2001, Middlegrunden in Denmark became the world's largest offshore wind farm. Estimated annual production is 85,000MWh, equal to 3% of Copenhagen's total consumption. 20 Bonus 2MW turbines are placed 180m apart in a curve, with a total windfarm length of 3.4km.

The wind farm was developed off the Danish coast by a consortium of Københavns Energi and Middelgrundens Vindmøllelaug. The two partners own ten 2MW turbines each in Middelgrunden.

The turbines are equipped with a modified corrosion protection, internal climate control, high-grade external paint and built-in service cranes.

Topics: Wind turbines