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

Claim 12:
13. A system for subterranean energy storage, the system comprising:
a flexible storage vessel positioned within a body of desert sand, wherein the flexible storage vessel is configured to hold a cooled compressed gas;
a turbine generator coupled to the flexible storage vessel, wherein the cooled compressed gas is pressurized by conduction heating from the body of desert sand to render a pressurized gas;
a compressor unit configured to compress a gas stream to render a hot compressed gas stream;
a heat exchanger configured to cool the hot compressed gas stream to render the cooled compressed gas;
an insulated storage vessel configured to supply a heated coolant stream to a second turbine generator, wherein the heated coolant stream is a product of the heat exchanger removing heat from the hot compressed gas stream to render the cooled compressed gas; and
a valve configured to control supply of the pressurized gas to the turbine generator.