Apparently

The system includes 16 spherical water tanks, each capable of holding 3,500 cubic meters of water, with a total volume of 56,000 cubic meters — roughly equivalent to 22 standard swimming pools.

These thermal storage tanks play a key role in the process by capturing heat generated during air compression and reusing it later to warm the released compressed air, improving efficiency and reducing energy loss.

So you’re kind of right just with more steps