Sökning: "IEC 61400-11"

Hittade 4 uppsatser innehållade orden IEC 61400-11.

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

    Magister-uppsats, KTH/MWL Marcus Wallenberg Laboratoriet

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

    Sammanfattning : 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. LÄS MER

  3. 2. MÄTNING AV LJUDIMMISSION FRÅN VINDKRAFT. VIDAREUTVECKLING AV METOD FÖR MÄTNING

    Master-uppsats, KTH/MWL Marcus Wallenberg Laboratoriet

    Författare :Jens Fredriksson; [2012]
    Nyckelord :;

    Sammanfattning : The Swedish government have a goal that wind turbines shall produce 30 TWh by the year 2020, compared to about 3,5 TWh produced in Sweden during 2010. To minimize the disturbance that wind turbines create the Swedish Environmental Protection Agency has stated a guideline value that noise from wind turbines at nearby residents shouldn’t exceed 40 dBA, at 8 m/s wind speed. LÄS MER

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

    Master-uppsats, KTH/MWL Marcus Wallenberg Laboratoriet

    Författare :Manne Friman; [2011]
    Nyckelord :Directivity; wind; turbine; noise;

    Sammanfattning : 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. LÄS MER

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

    Magister-uppsats, Lunds universitet/Institutionen för energivetenskaper

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

    Sammanfattning : 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. LÄS MER