Patent ID: 11927131
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A system for subterranean energy storage, the system comprising:
a subterranean flexible storage vessel coupled to a heat exchanger, wherein the heat exchanger is configured to supply a cooled compressed gas stream to the subterranean flexible storage vessel, wherein the subterranean flexible storage vessel is at least partially surrounded by sand;
a turbine generator coupled to the subterranean flexible storage vessel, wherein the subterranean flexible storage vessel is configured to supply a pressurized gas stream that is heated by the sand to the turbine generator; and
a second turbine generator coupled to an insulated storage vessel, wherein the insulated storage vessel supplies a heated coolant stream byproduct of the heat exchanger removing heat from a hot compressed gas stream to render the cooled compressed gas stream.