This is happening on a household level as well as a national and
global level. One of the biggest challenges is finding alternative
energy sources of the green kind. In other words, harnessing nature to
our advantage without creating havoc while doing this.
Lately big power kites are being used to harness the enormous
amounts of energy hidden in the winds. At 30,000 feet the wind energy is
twenty times more than it is at sea level.
At Delft University of
Technology in The Netherlands, researchers are taking advantage of this
energy from kites with the help of a laddermill.
consists of a large number of kites which move in an upward and downward
motion. These kites are really a combination of kites and airplanes.
The kite can climbs with relative ease but needs a force pulling its
cable to descend.
Airplanes are the exact opposite,
requiring a large engine to ascend. Descending is easier, since it
pretty much just glides down.
The kites on the laddermill combine the ascending characteristics
of a kite and descending characteristics of an aircraft. By creating a
large loop of 'kite-planes' a rotation is formed. Coupled with a
generator, this can create energy.
Laddermills could potentially go up
to 30,000 feet, being able to generate approximately 100MW of energy.
This could potentially power about 100,000 homes, relatively
inexpensively. All of this is still in the developmental stages, though energy from kites is now way past the stage of theory.