Innovations in cluster-style wind turbines as potential renewable energy solutions

With growing focus on climate change and energy security, offshore wind power is gaining prominence as a potential renewable energy source.

Researchers are exploring the development of cluster-type wind power units, which involve multiple turbines.

Japan’s Kyushu University’s Research and Education Center for Offshore Wind has introduced a new design with a shroud, a type of wind-collecting ‘lens’, aiming to construct a demonstration unit of 100 small wind turbines.

The performance of wind turbines increases with the area swept by the turbine blades, hence larger blades have been preferred, despite their high costs and issues related to fast rotation speed and noise.

Cluster-type wind power units, assembled on a grid, offer a promising alternative.

Their design allows for efficient power generation with slower rotation, and close proximity of turbines increases efficiency.

Kyushu University, in collaboration with startup Riamwind, aims to build a demonstration system of two 25-meter-diameter turbine units in 2024.

The results from this demonstration will guide the construction of a larger system, estimated to generate 20 megawatts of power.

This approach is appealing to global investors.

For instance, Norwegian startup Wind Catching Systems plans to build a large unit comprising about 130 turbines, claiming that its technology can generate substantial energy.

Riamwind’s innovative turbine design includes a diffuser shroud to concentrate wind energy, making power generation more efficient.

However, this design faces challenges such as susceptibility to high wind pressure and high costs of the supporting grid.

Despite these challenges, the international commitment towards renewable energy, as shown by the Group of Seven’s pledge to increase offshore wind capacity by 150 gigawatts by 2030, underscores the importance of advancing wind power technologies like cluster-type turbines.

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