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Resource Documents: Denmark (51 items)
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Indoor Measurements of Noise at Low Frequencies – Problems and Solutions
Author: Pedersen, Steffen; Møller, Henrik; and Persson Waye, Kerstin
ABSTRACT: Due to standing waves, the sound pressure level within a room may vary as much as 20-30 dB at low frequencies. Principal properties of low-frequency sound in rooms are illustrated by simulations, and sound pressure distributions as well as the performance of Swedish and Danish measurement methods are studied by measurements in three rooms. For assessment of annoyance, mainly areas of the room with high sound pressure levels are of interest, since persons present in such areas are not . . .
More »Big wind turbines, health and disease – a Danish perspective
Author: Johansson, Mauri
The history of wind turbines in Denmark started back in the 1970’s with very small but gradually bigger wind turbines which were mostly owned by local farmers.[1] The big wind turbines (>1 MW) came in the late 2000’s but at a rather slow pace. Documents based on the right of access in environmental and other Danish authorities have shown that already in the late 1980’s there were complaints about the noise, but local as well as central authorities generally refused to . . .
More »Negative long term effects on harbour porpoises from a large scale offshore wind farm in the Baltic
Author: Teilmann, Jonas; and Carstensen, Jacob
Abstract. Offshore wind farms constitute a new and fast growing industry all over the world. This study investigates the long term impact on harbour porpoises, Phocoena phocoena, for more than 10 years (2001–12) from the first large scale offshore wind farm in the world, Nysted Offshore Wind Farm, in the Danish western Baltic Sea (72 × 2.3 MW turbines). The wind farm was brought into full operation in December 2003. At six stations, acoustic porpoise detectors (T-PODs) were placed inside the . . .
More »Analysis of Wind Farm Performance in U.K. and Denmark
Author: Renewable Energy Foundation
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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