CoolIP index Most recent edit: Saturday February 15, 2014 SearchSite
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Kite as Energy Storage Device
Notes and essays regarding "kite as energy-storage device" would fit in
this topic thread.
Have a kite system be integrated with masses that are beyond simple
kite; operate the kite system to lift those masses to 1000 m altitude.
Such system at altitude stores substantial potential energy. Put that
energy to work in various ways.
Does this deserve a stand alone entry? Wind power in general is used extensively to pump up hydropower storage systems. This is used a lot in Scandinavia. AWES in themselves are not a method of storing energy but of supplying energy. Just a thought from an amateur! MarkB
Over-a-century-old kite-as-storage-device is in focus at the moment in
this post. In light winds let out line gingerly as the wing set gets some
distance from the anchoring arrangement; gradually wing set carries out
considerable length of line, sometimes even letting the line touch earth
or sea surface in the line sag. The system is storing minimal amount of
energy as the wing set and line are not gaining much altitude and is being
let downwind. Then the next step: take energy from the powered anchor set
and haul in the let out line some; haul in at a rate that causes an
apparent wind on the wing set that is used to have the wing set and line
climb rapidly to higher altitude where winds are commonly stronger and
more consistent than near ground or sea surface. The wing set and line
store energy in such a process. A next step could be to repeat a similar
cycle, but in the next step the stored energy of the wing set and line set
are used for a gliding action that can result in the wing set and line set
going even greatly further downwind for a net result of getting more and
more line out. The new longer line out will then permit another climb
cycle where even more energy may be stored in the wing set and line set,
as there is more line to be used to permit the wing set and line set to
reach even higher altitudes than in earlier cycles where perhaps even
stronger winds might be reached. With such storage and use cycles, an AWES
system may be launched to some working altitude, perhaps important for
special works. Thank you, Kite System, for being able to be a storage
device in such activity which may be a launching activity or a transport
activity or a missioned storage activity or some specially characterized
Kite system as energy-storage device.A specific focus may be to have kite system store energy in the wing and then fully release the entire wing to use the stored energy for gliding, dropping, transport, delivery of people and goods, impact energy, etc. An example of this energy-storage story was in the kiting of huge wings that carried troops; sometimes the troopers would exits while still under kiting; but other times the wing would be released from tow and the wing would glide a further distance when then the troopers would exit by parachute. Another use of such energy storage that gained significant use was in the kiting up of wings for release to glide for experimenting with spacecraft-recovery devices. Similarly, the sport of the "Kitemen" used the stored energy to be used after release from being kited to altitude. Just how far this method of storing energy and use of the energy by the released wing set is up to the creative powers of humans. ~ JoeF
Kites and lines are potential fuel stocks that can be stored in large
outdoor piles and self-transport as extended kite trains. Classic kites
are biofuels and modern UHMWPE is essentially long-chain paraffin-kerosene
(~10kWhr/kg). A flying "pipeline" might simply be a cheaply-made rope that
feeds a fuel cycle. A series of pulleys held up by kites is a simple way
to levitate the line XC. The line might pump as it travels, to power the
kites to lift in zero wind.
When a kite system holds parts that rotate, then the rotational kinetic energy or angular kinetic energy is a form of stored energy. Flywheels, turbine blades, rotating disks, and gyroscopic rings are examples. Gyrokites and flipwings have some stored angular kinetic energy. Some flipwings add stabilizing rotating disks that do not play to lift, but play to stabilize; such disks store angular kinetic energy. ~ JoeF
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