Environmental Engineering Reference
In-Depth Information
on the island of Bogø, Juul got a chance to test a 3-bladed rotor.
The original 18 m 2-bladed rotor from the Aeromotor was replaced
by a 13 m 3-bladed rotor and the turbine was connected to the
AC grid.
Figure 3.21
The final design for the 2-bladed 15 kW test turbine (left);
The 65 kW Bogø wind turbine with Juul's 3-bladed rotor was
mounted on a concrete tower from a 2-bladed Aeromotor
(right) (Photos: The Danish Energy Museum).
The modified turbine had been in service for 10 years until
1962. Despite of the smaller rotor diameter, the average yearly
production of 80 000 kWh was more than three times the pro-
duction of the original two-bladed turbine. It was partly because
of the 3-bladed rotor with the more efficient aerodynamic profiles,
developed by Juul—but first of all it showed the efect of the
connection to the high capacity AC grid.
3.9
Post-War Development Blocked by Cheap
Oil and Coal
Juul's experiments were remarked outside Denmark and in 1950
he was invited to take part in international meetings on wind
power in Paris and London. In Denmark however the attitude
towards wind power was less positive. Juul's experiments were
supported by his employers at SEAS, but the majority of Danish
Search WWH ::




Custom Search