Polamis tidal power in Portugal 1

[0707]

The first commercial wave farm has been exported to Portugal by Edinburgh-based Ocean Power Delivery, their Pelamis wave machine is at the cutting edge of marine.

“Each joint of the Polamis or “sea snack”contains a hidraulic pump. As wave move the section high pressure oil is pumped from the joints through motors, wich drive the generators that produce electricity.”

Go to the site bellow to see an animation of the system.

http://www.oceanpd.com/Pelamis/default.html

luis marques

 

[SomptingGuy]

The reason there are tides is because of the moon and sun's pull. However, unless the distance between us and them (moon/sun) changes, no net work can be done. Ergo, it must be the Earth's angular momentum that is decreasing to provide the tidal energy.