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This paper describes the economics of offshore wind energy in the transition from prototype offshore wind farms, developed and installed during the 1990's, to the commercial wind farms that are currently being installed. Since 1990, 96 MW of offshore wind have been installed in Europe and the...
Local and community ownership of renewable energy generation, e.g. grid connected wind turbines, can bring widespread benefits to the local community and economy. Ownership may range from 100% of small projects to minor participation in larger schemes, but the knowledge and experience of local...
Accurate simulation of the dynamic stall of an oscillating airfoil is of major importance to wing and wind turbine blade design. However, dynamic stall is complicated and influenced by many factors, such as geometry shape of the airfoil, reduced frequency, etc. The difficulties of simulation are...
This paper considers the structural dynamic analysis of horizontal axis wind turbine (HAWT) rotor blades. Initially a blade from a 300 W machine was used, using both experimental and theoretical modal analyses. In the experiments, a DAS (Dynamic Signal Analysis and Fault Diagnosis System) was...
As the wind speed increases from zero, small turbines will cut-in only when the aerodynamic torque acting on the blades exceeds the resistive torque of the generator and drive system. This Note describes the use of standard blade element theory to calculate the cut-in wind speed, at which...
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