The energy conversion device 1 consists of a liquid tank 11 in which liquid 10 is stored, a plurality of gas receiving sections 12 that are installed vertically in the liquid tank 11 and can rotate or move vertically. The energy conversion device 1 consists of a liquid tank 11 in which liquid 10 is stored, multiple gas receiving sections 12 installed vertically in the liquid tank 11 that can be rotated or moved vertically, nozzles 13 that blow compressed gas from below the gas receiving section 12 located at the bottom in the liquid tank 11, and nozzles 14 that store compressed gas as a primary energy source and blow compressed gas from below the gas receiving section 12. In the liquid tank 11, there is a nozzle 13 that ejects compressed gas from below the gas receiving section 12 located at the bottom, a gas cylinder 14 that stores compressed gas as a primary energy source and delivers compressed gas to the nozzle 13, and a gas receiving section 12 that receives compressed gas from the nozzle 13. The gas receiving section 12 receives compressed gas ejected from the nozzle 13, and the buoyancy force generated in the gas receiving section 1 2 by the buoyancy force generated when the gas receiving section 12 receives compressed gas from the nozzle 13, and the output means 3 that outputs the kinetic energy of rotation or upward movement to the outside of the liquid tank 11 as secondary energy. 1 1, and a recovery device 4 that returns the gas from the liquid tank 1 1 to the gas cylinder 14.

A subterranean energy storage system configured to store and subsequently release potential energy. Storage of potential energy is achieved by the transfer of a pseudo fluid from a first storage tank to a second storage tank located above the first storage tank, and is subsequently released by the transfer of the pseudo fluid from the second storage tank to the first storage tank. To transfer the pseudo fluid between the first and second storage tanks, the subterranean energy storage system comprises at least one continuous conveyor mechanism extending through at least one transport shaft, wherein the at least one continuous conveyor mechanism comprises a plurality of vessels arranged along a length of the continuous conveyor mechanism. The subterranean energy storage system further comprises an energy transfer means operably connected to the at least one continuous conveyor mechanism to transfer power to and from the subterranean energy storage system.

A reactive blade turbine system works vertically, horizontally, or at an angle and clockwise or counterclockwise according to blade angle and locking position and adjusts to variations in fluid flow such as changes in tidal currents to generate power more efficiently regardless of direction of fluid flow.

An example system comprises an enclosure configured to be submerged in a body of water. The system also comprises a capture device coupled to the enclosure. The capture device includes a rotor shaft and a plurality of blades coupled to the rotor shaft. The plurality of blades are arranged to receive a flow of water when the enclosure is submerged in the body of water. The flow of water causes the plurality of blades to rotate the rotor shaft. The system also comprises a transfer device extending lengthwise from a first end to a second end of the transfer device. The transfer device is mechanically coupled to the capture device at the first end and configured to transfer a torque of the rotating rotor shaft from the first end to the second end. The second end is located outside the enclosure.

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.

The present invention provides improved methods, apparatus, and manufacture for an Archimedes Screw using a new blade design to increase the volume of water raised or lowered by about 9%-18%. The invention, in part alters the shape of the blades within the screw from a helicoid shape to a new shape called a “makroid” by the inventor. A helicoid blade in an Archimedes Screw has been used since antiquity and has not changed since then, limiting the efficiency. The makroid shape allows a greater quantity of water to be contained within the screw.

An apparatus can comprise a water tower that itself comprises an elevated water reservoir, at least one water conduit coupled between the elevated water reservoir and an external water distribution system, and at least a first water turbine disposed and configured to receive water via the at least one water conduit and to exit water to the external water distribution system. The apparatus can further comprise a generator that operably couples to that water turbine. The water tower can further include a speed-increasing gearbox that operably couples between an output shaft of the first water turbine and that generator. The apparatus optionally includes at least one electrolyzer operably coupled to receive both water and/or electricity sourced by the aforementioned water tower. The apparatus can also include at least one hydrogen-powered generator that receives hydrogen from the electrolyzer and that burns that hydrogen to generate electricity.

The energy transition involves the electrical power supply being almost completely covered by renewable energy sources such as solar plants or wind turbines. However, due to their naturally fluctuating output, these energy sources require the use of large energy storage systems, the realization of which still represents a major problem today. The present invention provides a solution which aims to secure the entire short-term storage capacity needed for the energy transition in Germany (and even Europe). For this purpose, in particular, the invention proposes the construction of a large-scale pumped-storage power plant in the Hambach open-pit mine, as a result of which the can mine be put to subsequent use in a sustainable way. The invention also relates to the construction and partial commissioning of the plant in parallel with the use that is being phased out, in particular that of lignite mining (by 2038). This is to avoid the loss of a significant number of existing jobs. After construction, it is not uncommon for lifetimes of over 100 or even over 1,000 years to be possible, which means that a particular level of sustainability can be ensured.

A solution mined cavity system and method is disclosed. The system comprises an underground cavity created by solution mining in salt deposits, an upper water reservoir, tubing means adapted to lead water from the upper water reservoir into the 5underground cavity and out of the underground cavity, and pumping means adapted to contribute to pumping water from the upper water reservoir via the tubing means out of the cavity.0

Disclosed are a wave power generation system for generating electrical energy by means of a hydraulic circuit, and a method for controlling same. The wave power generation system comprises a hydraulic motor for storing motion energy in a form of fluid pressure and volume if a plurality of tension transmission members, for transmitting motion energy by means of six-degrees-of-freedom motion of a movable object floating on the waves, move in one direction, and for maintaining the tension of the tension transmission members by means of the stored energy if the tension transmission members move in the other direction. Electric energy is alternately generated by means of the bidirectional motion of the plurality of tension transmission members.