Sökning: "vertical axis wind turbine"

Visar resultat 16 - 20 av 21 avhandlingar innehållade orden vertical axis wind turbine.

  1. 16. Blade force measurements and electrical torque ripple of a vertical axis wind turbine

    Författare :Morgan Rossander; Sandra Eriksson; Hans Bernhoff; Magnus Rahm; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk fysik med inriktning mot elektricitetslära; Engineering Science with specialization in Science of Electricity;

    Sammanfattning : Wind power has become an attractive alternative for clean energy production. Horizontal axis turbines are increasing in power rating and are maturing as products. The cost of maintenance, noise levels and durability are possible concerns of the modern horizontal axis wind turbines. LÄS MER

  3. 17. Noise, eigenfrequencies and turbulence behavior of a 200 kW H-rotor vertical axis wind turbine

    Författare :Erik Möllerström; Jonny Hylander; Fredric Ottermo; Hans Bernhoff; Göran Sidén; Mats Åbom; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VAWT; H-rotor; eigenfrequency; semi-guy-wired tower; noise emission; sound power level; microphone array; turbulence intensity; power curve; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : Vertical-axis wind turbines (VAWTs) have with time been outrivaled by the today more common and economically feasible horizontal-axis wind turbines (HAWTs). However, VAWTs have several advantages which still make them interesting, for example, the VAWTs can have the drive train at ground level and it has been argued that they have lower noise emission. LÄS MER

  4. 18. Extreme Load Conditions for Wind Powered Direct Drive PM Generators

    Författare :Fredrik Bülow; Uppsala universitet; []
    Nyckelord :;

    Sammanfattning : Wind energy is a rapidly growing energy source with vast potential. Vertical axis wind turbines could be more cost-effective than the three bladed horizontal axis turbines that dominate today. LÄS MER

  5. 19. Grid Connection of Permanent Magnet Generator Based Renewable Energy Systems

    Författare :Senad Apelfröjd; Sandra Eriksson; Frans Dijkhuizen; Uppsala universitet; []
    Nyckelord :VAWT; H-rotor; Tap Transformer; Cascaded H-bridge Multi-Level; Renewable Energy; Wind power; Wave power; Marine Current Power; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : Renewable energy is harnessed from continuously replenishing natural processes. Some commonly known are sunlight, water, wind, tides, geothermal heat and various forms of biomass. The focus on renewable energy has over the past few decades intensified greatly. LÄS MER

  7. 20. Resource characterization and variability studies for marine current power

    Författare :Nicole Carpman; Karin Thomas; Mats Leijon; Sandra Eriksson; AbuBakr S. Bahaj; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Marine current energy; tidal currents; wake; variability; renewable energy; ADCP; flow measurement; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : Producing electricity from marine renewable resources is a research area that develops continuously. The field of tidal energy is on the edge to progress from the prototype stage to the commercial stage. LÄS MER