Could energy bags be used to store electricity underwater?

In the Bag: Energy bags like this 5-meter-diameter one, from Thin Red Line Aerospace, of Canada, could be used to store electricity underwater as compressed air. Engineers hope the technology could one day smooth out the intermittency of electricity produced by offshore wind farms and other renewable energy sources.

What does Garvey think about underwater storage?

Garvey sees the underwater storage as part of a holistic system. “An offshore wind farm should not simply be a subsystem that produces electricity when the wind blows. It should be a system which takes energy from the wind and does whatever is needed to deliver energy to shore as that [energy] is needed.”

What are the risks of underwater compressed air storage?

Assuming that compressed air is stored at a similar temperature to the surroundings—as is the case at Huntorf and at McIntosh), the additional losses introduced by underwater storage are those associated with leakage and pressure drop. With a well-manufactured vessel, leakage losses should be small.

Could Hydrostor's underwater balloons make energy storage possible?

Hydrostor's underwater balloons could at least make the energy storage method possible in communities near the ocean or deep lakes. Sitting under roughly 180 feet of water, Hydrostor’s six test balloons measure 29.5 feet tall and 16.4 feet wide.