Sökning: "Vertical axis turbine"

Visar resultat 1 - 5 av 27 avhandlingar innehållade orden Vertical axis turbine.

  1. 1. Fluid Mechanics of Vertical Axis Turbines Simulations and Model Development

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Anders Goude; Uppsala universitet.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wind power; Marine current power; Vertical axis turbine; Wind farm; Channel flow; Simulations; Vortex model; Streamtube model; Control system; Graphics processing unit; CUDA; Fast multipole method; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : Two computationally fast fluid mechanical models for vertical axis turbines are the streamtube and the vortex model. The streamtube model is the fastest, allowing three-dimensional modeling of the turbine, but lacks a proper time-dependent description of the flow through the turbine. LÄS MER

  2. 2. Aerodynamics of Vertical Axis Wind Turbines Development of Simulation Tools and Experiments

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Eduard Dyachuk; Uppsala universitet.; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; wind power; vertical axis turbine; H-rotor; simulations; streamtube model; vortex model; dynamic stall; measurements; blade; force; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : This thesis combines measurements with the development of simulation tools for vertical axis wind turbines (VAWT). Numerical models of aerodynamic blade forces are developed and validated against experiments. The studies were made on VAWTs which were operated at open sites. LÄS MER

  3. 3. Vertical Axis Wind Turbines Electrical System and Experimental Results

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Jon Kjellin; Uppsala universitet.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VAWT; H-rotor; start-up; all-electric control; Power Coefficient; stall; tip speed ratio; Renewable energy; Measurement systems; PM-generator;

    Sammanfattning : The wind power research at the division of Electricity at Uppsala University is aimed towards increased understanding of vertical axis wind turbines. The considered type of wind turbine is an H-rotor with a directly driven synchronous generator operating at variable speed. LÄS MER

  4. 4. Experimental Vertical Axis Wind Turbine System

    Detta är en avhandling från Uppsala : Institutionen för teknikvetenskaper, Uppsala universitet

    Författare :Jon Kjellin; Uppsala universitet.; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Vertical axis wind turbines may have mechanical advantages compared to conventional horizontal axis wind turbines, which make vertical turbines interesting to study. A 12 kW straight-bladed Darrieus turbine has been designed and constructed by the Division of Electricity at Uppsala University. LÄS MER

  5. 5. Vertical Axis Wind Turbines Tower Dynamics and Noise

    Detta är en avhandling från Uppsala : Uppsala universitet

    Författare :Erik Möllerström; Högskolan i Halmstad.; Uppsala universitet.; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VAWT; H-rotor; eigenfrequency; semi-guy-wired tower; noise emission; sound power level;

    Sammanfattning : Vertical axis wind turbines (VAWTs) have with time been outrivaled by the today common and economically feasible horizontal axis wind turbines (HAWTs). However, VAWTs have several advantages such as the possibility to put the drive train at ground level, lower noise emissions and better scaling behavior which still make them interesting for research. LÄS MER