U.S. Looks to Rediscover Hydropower as Untapped Energy SourceFrom the pipes in water-treatment plants to long-forgotten river turbines, overlooked sources of energy throughout the U.S. are poised to be tapped.By Madeline BodinPublished in the October 2008 issue.
Wave-Powered Boat Goes Beyond Record With Green DesignBy Brian LisiPublished on: March 14, 2008
Verdant Power Free Flow Turbine being deployed in New York City's East River. (Photograph by Kris Unger/Verdant Power, Inc)How it Works /// Traditional hydropower harvests the potential energy of falling water. Hydrokinetic technologies reap energy from water as it moves laterally, either in the flow of a river or in the change of tides. So far, the designs are as diverse as water bodies themselves. GCK Technology in San Antonio has developed a helical turbine; Free Flow Power Corporation, based in Gloucester, Mass, introduced a turbine that is wheel-shaped. Several companies take advantage of a hydrofoil principle. The turbine that Verdant Power installed in New York City's East River looks like a wind turbine tweaked to work underwater. Its blades are shorter and thicker than wind turbines, explains Verdant co-founder Trey Taylor, and the rotor faces downstream of the current, instead of upwind.
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http://www.aquamarinepower.com/technologies/
VIDEO
http://www.youtube.com/watch?v=TP9MqrQ0vyM
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www.kidsgeo.com/.../0134-the-earths-oceans.php
Simple pictures and maps of oceans
www.kidsgeo.com/.../0134-the-earths-oceans.php
Simple pictures and maps of oceans
