The world’s largest demonstration plant for a new kind of renewable energy storage is up and running in the west of the China. Called liquid-air energy storage (LAES) the plant uses renewable electricity to compress air to extreme densities until it turns to liquid. It can then be rapidly released to power a turbine and discharge that green energy back into the grid.
So what you’re saying is that it still consumes energy to keep the air in that liquid form making it not worth keeping longer then a certain amount of time.
Insulations can be pretty good idk. But yea there are losses. As for LNG, that has uses for many countries with no natural gas or pipeline, so it seems to be worth to cool NG down. Not sure about Air because the heat energy from burning NG makes it desirable to have.
But also liquids have the advantage of taking way less space and not as high of a pressure as simple compression because of that. Which one is preferred is situational, I just wanted to correct you that it is a liquid