Abstract: A storage system for storing compressed fluid is described. The system includes an excavation made in the ground, a balloon arrangement mounted within the excavation. The balloon arrangement includes a rebar cage and an inflatable balloon arranged within the rebar cage. The inflatable balloon has a middle portion and two end portions. One end portion includes a balloon inlet port, whereas the other end portion includes a balloon outlet port. The system also includes a filling material fully surrounding the inflatable balloon and configured for providing further reinforcement in conjunction with the rebar cage to the inflatable balloon, and for anchoring the inflatable balloon to the excavation. The system also includes a gas pipe assembly including an inlet gas pipe coupled to the balloon inlet port for filling the inflatable balloon with compressed fluid, and an outlet gas pipe coupled to the balloon output port for releasing the compressed fluid.

Abstract: A system for energy storage and electricity generation is described. The system includes an energy storage system providing compressed air and an electricity generation system. The electricity generation system includes an airlift pumping system pneumatically coupled to the energy storage system. The airlift pumping system includes a water collecting tank containing collecting water and a riser tube having a base immersed in the collecting water and configured for injection of the compressed air into the riser tube through the air pipeline to provide air bubbles within the riser tube that produce an upward flow of the collecting water together with the air bubbles. The electricity generation system also includes a hydro-electric power system driven by upward flow of the collecting water together with the air bubbles to produce electricity, and a water heating system for heating the collecting water in the water collecting tank.

Abstract: A system for energy storage and electricity generation is described. The system includes an energy storage subsystem and an electricity generation subsystem coupled to the energy storage subsystem. The energy storage subsystem is configured to store energy in the form of compressed air at a temperature greater than a temperature of ambient air in the atmosphere. The electricity generation subsystem is configured to produce electricity by utilizing the compressed air stored in the energy storage subsystem at the temperature greater than the temperature of ambient air in the atmosphere.

Abstract: A system for energy storage and electricity generation is described. The system includes an energy storage subsystem and an electricity generation subsystem coupled to the energy storage subsystem. The energy storage subsystem is configured to store energy in the form of compressed air at a temperature greater than a temperature of ambient air in the atmosphere. The electricity generation subsystem includes an airlift pumping system and a hydro-electric power system driven by the airlift pumping system, and is configured to produce electricity by utilizing the compressed air stored in the energy storage subsystem at the temperature greater than the temperature of ambient air in the atmosphere.

Abstract: A gas storage system for storing compressed gas, and method for constructing the system, are described. The system includes a borehole having a first borehole portion and a second borehole portion. An inflatable balloon is arranged within the second borehole portion. An upper support member, mounted on top of the inflatable balloon, is configured for anchoring the inflatable balloon to a sealing material filling the first borehole portion. A lower support member is arranged at the bottom of the inflatable balloon. The system includes an inlet gas pipe for filling the inflatable balloon from the gas compressing system and an outlet gas pipe for releasing the compressed gas. A compacted filling material is placed within a gap formed between the inflatable balloon, the upper support member, the lower support member, and an inner surface of the second borehole portion. One or more filling material pipes extend along the borehole to the gap for providing a filling material thereto.