Energy storage and delivery system and method
An energy storage and delivery system includes a crane operable to move blocks from a lower elevation to a higher elevation to store energy (e.g., via the potential energy of the block in the higher elevation) and operable to move blocks from the higher elevation to the lower elevation (e.g., by gravity) to generate electricity (e.g., via the kinetic energy of the block when moved to the lower elevation). The blocks remain vertically spaced from each other, and a vertical distance between the lower elevation and the higher elevation of each of the blocks is the same.
1. An energy storage and delivery system, comprising:
a plurality of blocks;
a frame extending between a bottom end of the frame and one or more rails at a top end of the frame, the frame having a plurality of columns between the bottom end and the top end, each column configured to movably support a set of the blocks between a front pillar of the column and a rear pillar of the column at different vertical locations of the column via one or more posts attached to the front and rear pillars that engage corresponding posts of the blocks such that the blocks in a same column of the plurality of columns are maintained vertically spaced from each other within the same column so that vertically adjacent blocks in the same column do not contact each other;
one or more cranes movably mounted to the one or more rails and configured to travel horizontally along the rails over one of more of the columns; and
an electric motor-generator electrically coupled to the one or more cranes,
wherein the one or more cranes are operable to couple to one or more of the blocks in a column to vertically move said one or more blocks from a lower elevation of the column to a higher elevation of the column to store an amount of electrical energy corresponding to a potential energy amount of said one or more blocks, and to vertically move said one or more blocks from a higher elevation of the column to a lower elevation of the column under a force of gravity to generate an amount of electricity via the electric motor-generator, wherein a vertical distance between the lower elevation and the higher elevation of each of the blocks moving within the same column is the same.
2. The system of claim 1 , further comprising one or more footings at the bottom end of the frame.
3. The system of claim 1 , wherein the one or more posts attached to the front and rear pillars are actuatable between an extended position to engage the posts of the block to retain the block in a fixed position in the column, and a retracted position to disengage the posts of the block to allow the block to be moved vertically by the crane without interference from the posts of the pillars.
4. The system of claim 1 , wherein the one or more posts attached to the front and rear pillars are fixed, the crane configured to couple to a block in the column and lift the block to disengage the posts of the block from the posts of the pillars, configured to laterally displace the block relative to the pillars so the posts of the block are clear of the posts of the pillars, vertically displace the block to a desired location, laterally displace the block in an opposite direction to align the posts of the block with the posts of the pillars, and lower the block so that the posts of the block engage the posts of the pillars.
5. The system of claim 1 , wherein the blocks are shipping containers.
6. The system of claim 1 , wherein the blocks only move vertically.
7. The system of claim 1 , further comprising cross-members that interconnect the pillars to provide the frame with lateral stability.
8. The system of claim 7 , wherein the cross-members are cables.
9. The system of claim 1 , wherein the one or more cranes couple to the one or more blocks via a grabber mechanism operatively coupled to the crane via one or more cables.
10. The system of claim 1 , wherein the one or more cranes are a pair of bridge cranes movably coupled to the rails.
11. A method for storing and generating electricity, comprising:
operating a crane movably mounted to one or more rails at a top of a frame to vertically move a plurality of blocks between a lower elevation of a column of the frame and a higher elevation of the same column, a vertical distance traveled by each of the blocks within the same column between the lower elevation and the higher elevation being the same, the blocks maintained vertically spaced from each other within the same column so that vertically adjacent blocks in the same column do not contact each other,
wherein operating the crane includes
coupling the crane to one or more of the blocks in the column of the frame and moving said one or more blocks from the lower elevation of the column to the higher elevation of the column to store an amount of electrical energy corresponding to a potential energy amount of said one or more blocks; and
coupling the crane to one or more of the blocks in the column of the frame and moving said one or more blocks from the higher elevation of the column to the lower elevation of the column under a force of gravity to generate an amount of electricity via an electric motor-generator electrically connected to the crane.
12. The method of claim 11 , wherein moving said one or more blocks from the lower elevation to the higher elevation or from the higher elevation to the lower elevation includes only moving the blocks vertically.
13. The method of claim 11 , wherein moving said one or more blocks from the lower elevation to the higher elevation or from the higher elevation to the lower elevation includes retracting one or more posts movably coupled to pillars of the column to allow the block to move unobstructed in a vertical direction along the column.
14. The method of claim 11 , wherein moving said one or more blocks from the lower elevation to the higher elevation or from the higher elevation to the lower elevation includes lifting the one or more blocks with the crane to disengage posts of the block from posts of the column, laterally displace the block relative to the column so the posts of the block are clear of the posts of the column, vertically displace the block to a desired location, laterally displace the block in an opposite direction to align the posts of the block with the posts of the column, and lowering the block so that the posts of the block engage the posts of pillars to fixedly support the block at the desired location.
15. The method of claim 11 , wherein moving said one or more blocks from the lower elevation to the higher elevation or from the higher elevation to the lower elevation includes moving one block at a time between the lower elevation and the higher elevation.
16. The method of claim 11 , wherein moving said one or more blocks from the lower elevation to the higher elevation or from the higher elevation to the lower elevation includes moving multiple blocks at a time between the lower elevation and the higher elevation, the blocks spaced apart from each other.
17. The method of claim 11 , wherein the blocks are shipping containers.
18. The method of claim 11 , wherein the crane is a bridge crane.