Conventional propeller-type tidal turbines can be used in waters at least 30 meters deep. The THAWT (Transverse Horizontal Axis Water Turbine) technology, by contrast, is designed for deployment in shallower, lower velocity, tidal waters.
THAWT is developed by Oxford University's Department of Engineering Science in conjunction with Kepler Energy. A one kilometer long tidal energy system, capable of creating 30 megawatts at peak performance, has been proposed for installation in the Bristol Channel, UK. The project would cost an estimated $224 million and could be operational by 2021. Read more at http://www.reuters.com/
