Sökning: "HAWT"

Visar resultat 1 - 5 av 14 uppsatser innehållade ordet HAWT.

1. 1. A Feasibility Study and Business Model for Micro Vertical Axis Wind Turbine in Sweden

   Master-uppsats,

   Författare :Harish Babu; Dona Maria Mathew; [2021]
   Nyckelord :Vertical axis windmills; Feasibility; VAWT in Sweden; Business Model; Renewable energy;

   Sammanfattning : This project is a part of the master thesis for the course Energy smart innovation in the built environment at Halmstad University. This project is done to check the feasibility of VAWT on replacing traditional horizontal axis windmills, costly offshore windmills, and other renewables. LÄS MER

3. 2. Load Control Aerodynamics in Offshore Wind Turbines

   Master-uppsats, KTH/Kraft- och värmeteknologi

   Författare :Lorenzo Cantoni; [2021]
   Nyckelord :Wind Turbine; Offshore; Blade; Rotor; Computational Fluid Dynamics; Airfoil; Aerodynamic; Aeroelasticity; Simulation; Fluid; Structure; Interaction; Loads; Control; Response; Harmonics; Vibration; Damping; Flutter; Trailing Edge; Flaps; Wind Gust; Lift; Drag; Unsteady; Pressure; Velocity; Vindkraftverk; offshore; blad; rotor; beräkningsvätske-dynamik; flygplatta; aerodynamisk; aeroelasticitet; simulering; vätska; struktur; interaktion; belastningar; kontroll; respons; övertoner; vibrationer; dämpning; fladdring; bakkant; klaffar; vindstöt; lyft; Drag; ostadig; tryck; hastighet;

   Sammanfattning : Due to the increase of rotor size in horizontal axis wind turbine (HAWT) during the past 25 years in order to achieve higher power output, all wind turbine components and blades in particular, have to withstand higher structural loads. This upscalingproblem could be solved by applying technologies capable of reducing aerodynamic loads the rotor has to withstand, either with passive or active control solutions. LÄS MER

4. 3. Dimensionering och konstruktion av passiv mekanisk pitch för småskaliga horisontalaxlade vindkraftverk

   Kandidat-uppsats, Högskolan i Halmstad/Akademin för ekonomi, teknik och naturvetenskap

   Författare :David Oljelund; [2020]
   Nyckelord :Wind; turbine; wind; power; pitch; mechanical; passive; design; dimension; sizing; HAWT; axis; horizontal; axle; small; scale; torsion; spring; spring; loaded; torsion; BEM; blade; element; mechanical; engineering; power; production; over; rated; wind; tip; speed; ratio; Vindkraft; vind; kraft; pitch; mekanisk; passiv; konstruktion; dimensionering; horisontalaxlad; horisontal; axlad; horisontalaxlat; småskala; småskalig; små; skala; vridfjäder; torsionfjäder; fjäderbelastad; fjäder; vrid; torsion; BEM; Blad; Element; maskinteknik; effektproduktion; över; märkvind; löptal;

   Sammanfattning : För vindkraftverk i mindre skala används i huvudsak två sätt att avlasta vid höga vindhastigheter, stallreglering och girning ur vind. En tredje metod är att pitcha rotorbladet till en mindre attackvinkel. Då minskar belastningen på rotorbladet samtidigt som effektgenerering kan bibehållas. LÄS MER

5. 4. STRUCTURAL ANALYSIS OF TRUSS CONSTRUCTION FOR WIND TURBINE BLADES

   Uppsats för yrkesexamina på grundnivå, Lunds universitet/Institutionen för byggvetenskaper; Lunds universitet/Byggnadsmekanik

   Författare :Björn Weddig; [2016]
   Nyckelord :Wind turbine blade; FRP; Truss system; Instability; Buckling; Non-Linear; Eigenvalue problem; Frequency response analysis; Transient dynamic response; Technology and Engineering;

   Sammanfattning : The usage of wind turbines during the latest years has grown substantially and are becoming an increasingly important source of renewable energy, as many countries are trying to reduce their reliance on fossil fuels. In order to increase the effect of the wind turbines the length of the blades has been increased, which has also led to an increase of the cross-section dimensions. LÄS MER

7. 5. A stochastic analysis of Turbulence Intensity influence over various sizes of HAWT : Study of hypothetical relationship between Rotor Diameter and influence level of Turbulence Intensity

   Magister-uppsats, Högskolan i Halmstad/Energivetenskap

   Författare :Allen Christo Nicholas; [2016]
   Nyckelord :Turbulence intensity; power performance; power deviation; power coefficient; tip speed ratio.; Turbulensintensitet; effektuttag; effektavvikelse; verkningsgrad; löptal;

   Sammanfattning : This disquisition aims for the study of turbulence intensity influence over the power performance of different sizes of turbines with the intent to validate a hypothesis. The hypothesis formulated for the analysis is the relationship between the rotor diameter (turbine size) and turbulence intensity. LÄS MER