Compressing Air for Renewable Energy Storage

[DawudTalut]

Peace be on you.

All compressed air energy storage plants work under the same basic premise. When power is abundant, it's drawn from the electric grid and used to power a large air compressor, which pushes pressurized air into an underground geologic storage structure. Later, when power demand is high, the stored air is released back up to the surface, where it is heated and rushes through turbines to generate electricity. Compressed air energy storage plants can re-generate as much as 80 percent of the electricity they take in.

Source:Not just blowing in the wind: Compressing air for renewable energy storage
Ones wishes if such methods could help countries with lesser electricty which starts chain of other problems.

 

[Revoltingest]

We should note that the "80 percent" energy recovery is not 80% efficiency, & requires additional energy when generating
electricity. But this could be a useful method, & has already been used in pneumatic industrial trucks over 100 years ago.