the flow rate is proportional to the rate at which the volume of the chamber decreases and it is inversely proportional to the cross sectional area of the opening through which the liquid enters the chamber this flow rate is controlled through valves and or nozzles and the flowing water is used to turn a hydraulic motor or hydraulic turbine when the turbine is operated by water flowing out of the chamber storage of energy in the chamber will be slowed by the reaction force generated therefore the invention can also rely upon two or more storage volumes so that the turbine is operated only by inflowing water these embodiments of the invention also enable realization of the increased efficiency and reduced costs obtainable with hydraulic turbines and generators which can be over 90 furthermore for underwater operation as in connection with offshore windfarms one or more submerged turbines adjacent to the storage volume will contribute to the required mass to anchor the air filled volume thereby eliminating the potentially high materials cost that could otherwise be incurred by virtue of the anchoring requirement when a hydraulic turbine is operated by inflowing water it will not use 100 of the energy stored in the compressed air this is particularly true for deep underwater operation where the energy stored is augmented by the work done in transporting air to the underwater location against the buoyancy force it is also true for terrestrial operation where a contained volume of water is used to.