US 12,218,499 B2
Hydraulic compressed air energy storage system
Shay Cohen, Kfar Saba (IL)
Assigned to Storage Drop Ltd., Rehovot (IL)
Appl. No. 18/009,514
Filed by STORAGE DROP LTD, Rehovot (IL)
PCT Filed Jun. 9, 2021, PCT No. PCT/IL2021/050691
§ 371(c)(1), (2) Date Dec. 9, 2022,
PCT Pub. No. WO2021/250666, PCT Pub. Date Dec. 16, 2021.
Claims priority of provisional application 63/145,603, filed on Feb. 4, 2021.
Claims priority of provisional application 63/036,447, filed on Jun. 9, 2020.
Prior Publication US 2023/0216340 A1, Jul. 6, 2023
Int. Cl. H02J 15/00 (2006.01); F04F 1/12 (2006.01); F17C 1/00 (2006.01)
CPC H02J 15/006 (2013.01) [F04F 1/12 (2013.01); F17C 1/007 (2013.01); F17C 2201/0109 (2013.01); F17C 2201/054 (2013.01); F17C 2201/056 (2013.01); F17C 2205/0138 (2013.01); F17C 2221/013 (2013.01); F17C 2221/014 (2013.01); F17C 2221/031 (2013.01); F17C 2223/036 (2013.01); F17C 2227/0192 (2013.01); F17C 2227/0348 (2013.01); F17C 2250/032 (2013.01); F17C 2250/043 (2013.01); F17C 2270/0128 (2013.01); F17C 2270/0581 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A hydraulic compressed air energy storage system, comprising:
a plurality of air and liquid tanks, each of which comprises interdependent volumes of liquid and air; and dedicated passages through which incoming air may be fed forcing outflow of liquid, or incoming liquid may be fed, forcing outflow of air;
a plurality of compressed air tanks communicatively connected to a first group of the air and liquid tanks;
a pump;
at least one liquid turbine, the at least one liquid turbine electrically connected to a generator for generating electric power;
a plurality of nozzles for delivering cold liquid to the first group of air and liquid tanks to thereby cool the air when the air is compressed;
wherein the first group of air and liquid tanks comprises a plurality of tanks configured to store compressed air therein at different pressures ranging between atmospheric pressure and a maximum pressure of the compressed air tanks;
wherein, during charging of the system, liquid is pumped through the first group of air and liquid tanks in different stages, each having different maximum pressures for the compressed air, and air is expelled from the first group of air and liquid tanks and compressed in the plurality of compressed air tanks, and
during discharging of the system, compressed air is released from the compressed air tanks and said compressed air pumps liquid through the at least one liquid turbine, thereby generating electricity.