Underwater compressed air energy storage first for Canada

Working with the energy company Hydrostor, a team at the University of Windsor, Ontario, has been testing a unique CAES system that stores compressed 50 – 500 meters below the water’s surface in high-strength polyester bags when power supply outstrips demand.

When the grid demand increases, the weight of the water itself pushes the air back to the surface where it is then run through Hydrostor’s expander/generator system to generate the required electricity.

The team has already tested scale models of their system in the university’s swimming pool, plus a full-sized system in Lake Ontario. It is hoped that a commercial system could be online by the latter part of 2013.

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