ENERGY STORAGE SYSTEM INCLUDING PRESSURIZED RESERVOIR

摘要

An energy storage system (10) includes a reservoir (14) defining an interior chamber (66), a collapsible bladder (70) positioned within the interior chamber and having working fluid therein, a one-way valve (82) in fluid communication with the interior chamber and operable to permit entry of replacement air into the interior chamber as working fluid exits the bladder, a reversible pump/motor (22) in fluid communication with the bladder, and an accumulator (18) containing working fluid and gas. The accumulator is in selective fluid communication with the reversible pump/motor to deliver pressurized working fluid to the reversible pump/motor when operating as a motor, and to receive pressurized working fluid discharged by the reversible pump/motor when operating as a pump.