ELECTRIC ENERGY STORAGE IN THE FORM OF UNDERGROUND GRAVITY AND BUOYANT ENERGY
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United States of America Patent
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Issued Date -
May 23, 2024
app pub date -
May 18, 2023
filing date -
May 23, 2022
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Abstract
Underground facilities built for storing electric energy in the form of gravity and buoyant energy are described herein. In one embodiment, the facility is disposed in a thixotropic fluid beneath the ground surface and houses water to maintain a positive buoyancy and a piston having a bulk density greater than the water. In another embodiment, the underground facility is configured as a buoyant capsule arranged in a cylinder filled with water, where the cylinder is sealed except for openings in a bottom half of the cylinder to allow near unimpeded water flow from a location inside to a location outside of the cylinder. In another embodiment, the underground facility is configured as a negatively buoyant capsule.
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