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Hybrid Wind-Tidal Turbine To Be Installed off Japanese Coast

A hybrid wind-current power generation system will be installed off the Japanese coast later this year, said Tokyo-based Mitsui Ocean Development & Engineering Company (MODEC), the device’s developer.

The 500-kW Savonius Keel & Wind Turbine Dar- rieus, or SKWID, is a hybrid system featuring an omnidirectional Darrieus wind turbine and a Savonius tidal turbine, which share a floating axis. A power generation assembly sits between them at deck level, anchored by a set of rubber mounts to a floating semi-submersible platform. The system will be able to generate power from either or both sources.

The wind turbine will have a hub height of 47 meters (154 feet) and a rotor diameter of 15.2 meters (49 feet), according to the company.

Addressing the issue of stability, the company said the tidal turbine acts as ballast, making the assembly self-righting, and that the location of the gener- ator at deck level creates a low center of gravity as well as offering easy access for operations and maintenance. The Savonius tidal turbine is especially suited to harvesting energy from weak currents, MODEC says, and its rotation can be used to start the wind turbine spinning in low wind conditions.

MODEC is an offshore technology company specializing in floating oil and gas production systems. 

This article is part of our regional news briefs in the completely redesigned Renewable Energy World digital magazine. Subscribe here to recieve a free copy.

Lead image: Japan flag and sea via Shutterstock

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