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rotor diameter of m, and 0 m tubular tower with an insulated
storage tank inside. Heat was generated by directly coupled
adjustable fluid brake with hydraulic oil as the liquid. The power
was estimated to provide 90 kW at 4 m/s wind speed.
The Institute of Agricultural engineering in Taastrup did testing
and measurements of the fluid brake. Ricard Matzen had a great
influence on the entire process of developing the LO-FA windmill.
Another involved in the project was the engineering student
Thomas Krag Nielsen. Unfortunately, the main initiator Knud
Berthou passed away. Then the project was moved to the island
of Fejø. The idea was to put it in operation again, however, it did
not succeed to get a local approval and the LO-FA windmill was
scraped.
Figure 13.7
The LO-FA water brake windmill (left); Generator (right).
13.2.7
Ørn Helgason
In 98, Ørn Helgason from the Science Institute of the University
of Island started a heat-producing windmill project. The water
brake windmill was built and tested on the most northern island
of Iceland, Grimsey, at the Arctic Circle, where wind speeds reach
on average 8.5 m/s. The -bladed windmill had rotor diameter of
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