High altitude gravity energy storage
The present invention is realized by apparatus and methods for harvesting, storing, and generating energy by permanently placing a large rigid buoyant platform high in the earth's atmosphere, above clouds, moisture, dust, and wind. Long, strong and light tethers can connect the buoyant structure to the ground which can hold it in position against wind forces. Weights suspended from the buoyant platform with cables are raised and lowered by electric winches to store and release gravitational potential energy. High voltage transmission lines electrically connect the platform to the earth's surface. Electrical energy from the high voltage transmission lines or from photovoltaic arrays on the platform can be stored as gravitational potential energy and subsequently released as electricity from generators driven from the stored gravitational potential energy and used on the platform or transmitted via the high voltage transmission lines.
1. A method of making a system for storing and releasing energy from a solar panel on a platform in the low stratosphere said method comprising:
providing a buoyancy component having sufficient buoyancy to retain said platform in said low stratosphere,
providing a tether having a first and second end,
attaching said first end of said tether to said platform and said second end of said tether to the ground,
providing a winch having a motor and a generator operatively coupled to a tension member,
coupling said tension member to a weight, whereby said winch is capable of adjusting a position of said weight with respect to said winch by raising and lowering said weight by said tension member,
configuring said winch for receiving energy from an external power source comprising said solar panel on said platform and raising said weight using said energy,
storing potential energy in said raised weight, and
producing electricity by permitting said raised weight to fall at a controlled speed and mechanically drive said generator.
2. A method of making a system of claim 1 , said method further comprising:
having a photovoltaic panel positioned on said platform in said low stratosphere,
providing said external source of power from said photovoltaic panel positioned on said platform, and
connecting said photovoltaic panel to said winch to provide said external source of energy to power raising said weight, thereby raising said weight.
3. A method of making said system of claim 2 , said method further comprising:
providing a control system for operating said winch to release, said raised weight thereby permitting said weight to fall at a controlled speed.
4. A method of making a system of claim 3 , said method further comprising:
said control system further comprising control of
storing potential energy from said raised weight, and
providing said weight falling at a controlled speed, and
further providing said falling weight to mechanically drive said generator.