Aerodynamic Performance and Structural Design of 5 MW Multi Rotor System (MRS) Wind Turbines

Amira Elkodama, Amr Ismaiel, A. Abdellatif, S. Shaaban

Abstract


Multi-Rotor System (MRS) wind turbines provide a competitive alternative to large-scale wind turbines. It addresses many of the drawbacks of large wind turbines including transportation, installation, and maintenance difficulties for large blades. In this work, three different MRS configurations are studied and compared to the NREL 5 MW turbine. A twin, tri, and quad-rotor configurations are scaled-down from the original turbine, such that the total turbine capacity of each configuration is 5 MW. Aerodynamic performance has been calculated using an in-house Blade Element Momentum (BEM) code. A preliminary design for the support structure has been made and analyzed. The deflection slope angle for the tower-top of MRS configurations have the values of 0.54o-0.6o as compared to the single-rotor reference turbine with a value of 0.55o. The twin, tri, and quad-rotor configurations provide a total reduction in mass of 25.6%, 16.9%, and 22.5% respectively. Although the inertial and aerodynamic loads decrease as the number of rotors on an MRS increase, but the support structure should be considered before selecting the appropriate number of rotors.

Keywords


Multi-Rotor Systems; Renewable Energy; Structure Analysis; Wind Energy

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References


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DOI (PDF): https://doi.org/10.20508/ijrer.v12i3.13343.g8535

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