Multi-rotor Wind Turbine Undergoing Tests

A multi-rotor concept demonstration turbine being installed by Danish wind turbine manufacturer Vestas may challenge the accepted single-rotor turbine design. The project, launched in cooperation with the Technical University of Denmark, seeks to reduce the levelized cost of energy by increasing turbine output without increasing its size (see video).

The demonstrator includes four refurbished V29-225kW turbines produced during the 1990s. The turbine pairs are mounted at hub heights of 29 and 59 meters on a cylindrical tower. Various sensors are installed to aid in measurement and testing, including a LIDAR system at the top of the support structure to monitor the wind field in front of the rotors. Major research areas include structural dynamics, aerodynamics, and the accuracy of existing models in predicting loads.

Reductions in size and weight are expected to offer additional benefits in terms of transportation and installation.