With the situations going on the middle east , isarel doing research in these educational field is appreciated 🎉

Wth is this project ,no offense to the channel. But as an engineer, there is literally no difference to compressed air battery you pump into if it was underwater or not...... You pump the same amount pressure wether it was on the surface or underwater (it just depend on the pump power capability). The only good thing about this is just it will 'raise' the base level compression when it's almost empty, but that thing only work if your tank is 'flexible' 🤦. Some project that understandably work for deep underwater energy storage are basically the anti of this tech, which is vaccuum based underwater energy storage (i forgot the name of it). The pressure diff between vaccum concrete tank with the surrounding deep sea pressure will give so much energy potential differencial to make it a slightly better pressure based energy storage.