Abstract
In this work was carried out the aerodynamics design of a 1 MW horizontal axis wind turbine by using blade element momentum theory (BEM). The generated design was scaled and built for testing purposes in the discharge of an axial flow fan of 80 cm in diameter. Strip theory was used for the aerodynamic performance evaluation. In the numerical calculations was conducted a comparative analysis of the performance curves adding increasingly correction factors to the original equation of ideal flow to reduce the error regarding real operating values got by the experimental tests. Correction factors introduced in the ideal flow equation were the tip loss factor and drag coefficient. BEM results showed good approximation using experimental data for the tip speed ratio less than design. The best approximation of the power coefficient calculation was for tip speed ratio less than 6. BEM method is a tool for practical calculation and can be used for the design and evaluation of wind turbines when the flow rate is not too turbulent and radial velocity components are negligible.
Highlights
The horizontal axis wind turbine is the most efficient and most developed for electricity generation on large scale
In order to maximize the wind resource and minimize production costs and installation costs, improved designs have emerged to multiply the power per unit from two to ten times the power generated by a three-blade rotor, while these systems have some disadvantages with respect to traditional systems
This paper develops the design of a 1 MW wind turbine power, using Blade Element Theory (BET) and Momentum (BEM) at each blade element
Summary
The horizontal axis wind turbine is the most efficient and most developed for electricity generation on large scale. There are many parameters that influence a good design of wind turbines [8,9]. Among the main parameters are the rated wind speed, the tip speed and solidity. The designs widely used for power generation on a large scale are Darrieus rotors and horizontal axis rotors of three or two blades. In order to maximize the wind resource and minimize production costs and installation costs, improved designs have emerged to multiply the power per unit from two to ten times the power generated by a three-blade rotor, while these systems have some disadvantages with respect to traditional systems. The only disadvantage of this system is its scaling to over 1 MW powers
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