We Have Solar Power and Wind Power, Here Comes Moon Power
GE – Twice a day, like clockwork, the moon’s gravity makes the seas ebb and flow.
For Mark Baker, a marine renewables business manager at GE Power Conversion, the tides are the perfect source of energy, more predictable and reliable than wind or solar power.
People tried to capture tidal and wave energy since the Middle Ages when they used “tide mills” to grind grain. Ideas Lab reported that the first tidal power station was the Rance tidal power plant built between 1960 and 1966 in La Rance, France. But the technology did not catch on because of its high capital cost and the limited availability of sites with sufficient tidal flows.
The turbines resemble large aircraft propellers submerged in 180 to 240 feet of water. They stand in strategic “pinch points” of the firth, where the tides rush in and out at the highest speeds.
Engineers can capture energy from the vertical and horizontal movements of the tides. Some teams have also used buoys that generate electricity from the up and down movement of the waves. more> http://tinyurl.com/ph56ebk