Essays about: "IEC 61400-11"

Found 3 essays containing the words IEC 61400-11.

1. 1. The effect on noise emission from wind turbines due to ice accretion on rotor blades

   University essay from KTH/MWL Marcus Wallenberg Laboratoriet

   Author : Peter Arbinge; [2012]
   Keywords : wind turbine; wind turbines; noise; sound; acoustics; acoustic; ice; icing; ice accretion; rotorblades; rotor blades; IEC 61400-11;

   Abstract : Swedish EPA (Naturvårdsverket) noise level guide-lines suggest that equivalent A-weighted sound pressure levels (SPL) must not exceed 40 dBA at residents. Thus, in the planning of new wind farms and their location it is crucial to estimate the disturbance it may cause to nearby residents. READ MORE

3. 2. Directivity of sound from wind turbines : A study on the horizontal sound radiation pattern from a wind turbine

   University essay from KTH/MWL Marcus Wallenberg Laboratoriet

   Author : Manne Friman; [2011]
   Keywords : Directivity; wind; turbine; noise;

   Abstract : In the present paper, a study on the directivity of sound from a wind turbine has been conducted. The aim of the study is to investigate the horizontal sound radiation pattern through a field study compared to a noise prediction. READ MORE

4. 3. Sound Propagation From Wind Turbines - A comparison of measurements and calculations at the forest site Ryningsnäs.

   University essay from Lunds universitet/Institutionen för energivetenskaper

   Author : Johanna Nilsson; [2009]
   Keywords : Wind power plants sound emission sound immision sound propagation; Technology and Engineering;

   Abstract : Today wind power developers are exploring the possibilities of establishing wind turbines in forest areas, therefore improved sound prediction models for complex terrains are valuable. The Swedish model used today is only applicable for hard flat ground without any vegetation, and is not adjustable to any meteorological parameters except the wind speed. READ MORE