Hydrostor (HS) delivers grid-scale (10-100MW) underwater compressed air energy storage (UWCAES) systems. Excess energy from renewable or other energy sources drives a compressor to deliver air by underground pipe to large accumulators deep underwater. When energy is required, the flow is reversed to run generators that power the grid. The system is ‘adiabatic’: heat generated during compression is released during expansion to increase efficiency.
HS is lower-cost and longer life (20+ years) than batteries and uses proven equipment well understood by the utility sector. Market demand for energy storage has multiple drivers - primarily the rapid deployment and falling costs of renewable energy. HS transforms intermittent renewables to base load power. Regions that use diesel generators (e.g island nations) can switch to HS and immediately reduce their total power costs. Dense urban areas leverage HS to avoid the high capital costs associated with increased transmission capacity.
HS’s first commercial system in Lake Ontario services the local Toronto electrical utility. The second, in Goderich, is under construction. HS has partnered with global engineering firm, AECOM, to co-market the solution to utilities worldwide.