Author : Nilesh Mane, Prasad Mane, Kapil Sabale and Mayura Mokashi

The current generation wind turbines are upscale into multi megawatt range in terms of output power. However, the energy benefit from the turbine is offset by the increased mass and cost. 20 MW wind turbines are now feasible with rotor diameters up to 200 m, according to a new report from the EU-funded upwind project in 2011. The question is, how much bigger can wind turbines get realistically? One concept worth considering, and the one that is the subject of this project, is to have more than one rotor on a single support structure. Such turbines could have a greater power to weight ratio. Multi-rotor systems also offer the advantage of standardization, transportation and ease of installation and maintenance. In this thesis, 15W single rotor baseline wind turbine is compared with a 15 W multi-rotor wind turbine. The multiple rotors are downscaled using scaling curves

Keywords: Upwind, Power to weight ratio, Multi-rotor, Downscaled, Scaling curves