I was thinking about wave power and AWE today. How to extract the energy of a wave using a kite.
I based the idea on a bounding one kite one tether base.
Then look at the flow in a wave.
Now look the current at the crest of the wave is heading with the wave, the bough towards offshore.
The kite should fly (under water) along the crest of the wave pulling towards shore then turn 180 degrees and follow the trough back towards the origin, pulling towards offshore.
The sketch shows the basics. We have two winches [purple], one for crest production and one for trough production. Crest production path is colored green, trough red, and the yellow part is a return phase to account for net movement «downwind» during the production cycle. The kite is the black one, tethered to both winches at the same time
I think its a neat idea [I say, patting my own sholder].
Problems is one that the kite must fit in the wave so the wing area is naturally limited. So the concept would require many smaller units coupled together to get big net power output. I would naturally see many kites stacked on a single tether. But if we do that, its hard to align them all with the crest.
I am also like for most wave power just not dealing with such a nimble machinery running underwater for an extended duration.
Also, the kite must be placed carefully just beneath the surface of the sea. The kite must be placed carefully at the crest and trough, and the system must be able to find these and place the kite there in time. And account for a waves irregular shape (at least here in norway).
Except for those solvable details, this should power thousands of homes.