A contract was signed last month for delivery of eight Bonus 1 MW wind turbines for a wind farm at Pori on the west coast, reports project consultant Esa Holttinen of Ekono Energy Ltd. The owner and operator of the project, Ubraanituuli (Urban Wind), consists of nine municipal utilities in Finland, which together control about 20% of the country's electricity market (Windpower Monthly, June 1998). The turbines will be installed in June and commercial operation is expected from July. Electricity generated will be sold to customers through a green pricing scheme. If the demand is large enough, sites for five additional turbines have been reserved. Holttinen explains that Danish Bonus was chosen over four other major wind turbine manufacturers, among other factors, due to its experience in northern Finland and Sweden. Icing conditions prevail in Pori at 80 metres height for about one month a year. "If the turbines should be stopped during the icing periods, this would mean loss of production of up to seven to ten per cent on an annual basis, since the winter months are the windiest," Holttinen says. For this reason, Bonus is supplying a "cold climate version" of its turbine, complete with an anti-icing system developed jointly by Bonus and Kemijoki, a large hydro power producer from the Finnish Lapland. A small visitor centre will also be built next to the wind farm for public relations purposes, where a large computer screen will display various parameters for each of the turbines, supplied from a custom built monitoring system.
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Senior Renewable Energy Analyst (WindGEMINI Product Lead) DNV GL Bristol (City Centre), City of Bristol