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Resource Documents: Denmark (55 items)
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Underwater noise of operating wind turbines
Author: Discovery of Sound in the Sea
As a turbine operates, vibrations inside the nacelle (the housing that contains the generator, gearbox, and other parts) are transmitted down the main shaft of the wind turbine and into its foundation. These vibrations then propagate into the water column and seafloor. Mechanical noise generated by offshore turbines is concentrated at low frequencies below 1kHz, generally below 700 Hz. Bockstigen-Valar, Sweden Underwater recording taken less than 50 m from a 500 kW turbine operating at the Bockstigen-Valar offshore wind farm (Baltic Sea, . . .
More »Wind Turbines, Shadow Flicker, and Real Estate Values
Author: Andersen, Carsten; and Hener, Timo
Abstract: We analyze the impact of wind turbines on house prices, distinguishing between effects of proximity and shadow flicker from rotor blades covering the sun. By utilizing data from 2.4 million house transactions and 6,878 wind turbines in Denmark, we can control for house fixed effects in our estimation. Our results suggest strong negative impacts on house prices, with reductions of up to 12 percent for modern giant turbines. Homes affected by shadow flicker experience an additional decrease in value . . .
More »Sensitivity mapping of harbour seals, grey seals and harbour porpoises to the construction and operation of offshore wind farms in Danish waters
Author: Stokholm, Iben; et al.
Preface This report contributes to the project “Environmental mapping and screening of the offshore wind potential in Denmark” initiated in 2022 by the Danish Energy Agency. … The project is carried out by NIRAS, Aarhus University (Department of Ecoscience) and DTU Wind. The overall project consists of four tasks …: Sensitivity mapping of nature, environmental, wind and hydrodynamic conditions. Technical fine-screening and assessment of the overall offshore wind potential based on the sensitivity mapping and relevant technical parameters. Assessment of potential . . .
More »Performance of Wind Farms in the United Kingdom and Denmark
Author: Hughes, Gordon
Executive Summary 1. Onshore wind turbines represent a relatively mature technology, which ought to have achieved a satisfactory level of reliability in operation as plants age. Unfortunately, detailed analysis of the relationship between age and performance gives a rather different picture for both the United Kingdom and Denmark with a significant decline in the average load factor of onshore wind farms adjusted for wind availability as they get older. An even more dramatic decline is observed for offshore wind farms . . .
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