An energy island system arranged related to a body of water with a seafloor, a surface and a depth over an underground is disclosed. The system comprises a structurally rigid shell (1) extending from the seafloor to above the water surface, inclosing a lagoon of the body of water, material with a negative buoyancy stacked around the shell (1) forming a gravity stabilized wall (2), and a tunnel (5) established in the wall (2), providing for hydraulic communication between the surrounding body of water and the interior of the shell (1). Further, a method for construction of an energy island is disclosed.

An energy island system arranged related to a body of water with a seafloor, a surface and a depth over an underground is disclosed. The system comprises a structurally rigid shell (1) extending from the seafloor to above the water surface, inclosing a lagoon of the body of water, material with a negative buoyancy stacked around the shell (1) forming a gravity stabilized wall (2), and a tunnel (5) established in the wall (2), providing for hydraulic communication between the surrounding body of water and the interior of the shell (1). Further, a method for construction of an energy island is disclosed.

A reservoir dredging assembly includes a dredging tube and at least one dredging device adapted to be installed to at least one secondary reservoir. The at least one dredging device includes a linking tube, an extending tube, a water gate, and a control unit. The linking tube is connected to the dredging tube for water in a primary reservoir, together with sediments deposited therein, to flow through. The extending tube has a top cutlet adapted to be located lower than the maximum water level of the primary reservoir. The water gate is mounted in the linking tube at a position downstream of the extending tube. The control unit is convertible between a first state for closing the water gate and a second state for opening the water gate.

The present invention relates to the hydrokinetic chamber (22) comprising the propeller/vanes of the hydrokinetic turbine (23), the water collector (21) of the hydrokinetic chamber, a leak channel (26) of the hydrokinetic chamber, a flow control gate (28) for controlling the flow into the hydrokinetic chamber, and stop-logs (27) for the maintenance of the hydrokinetic chamber, the hydrokinetic chamber being associated with a chamber (24) for generating hydrokinetic energy, which houses a turbine-generator (23) and motor pumps, the chambers (22) and (24) being mounted in an energy-generating module for generating hybrid energy. The invention also relates to a method for generating energy and to a floating Hydroelectric Power Plant using the components of the present invention.

A device and method for converting electric energy into pneumatic energy and vice versa, which involves: pumping a liquid forming a liquid piston into a conversion chamber in which a quantity of air is trapped until the air reaches a pressure of a compressed air storage vessel; or churning a liquid by expanding the compressed air in a conversion chamber which is filled with a quantity of liquid, in which device or method the pumping or the churning of the water takes place in the same conversion chamber and consecutively in at least two pumping or churning stages, respectively, provided so as to operate in different pressure ranges. The present device and method can be used in particular in the field of converting and storing electric energy.

Systems and methods related to floating powerhouse for hydropower turbine systems are presented. A turbine system may be coupled to floating powerhouse that can include a floating platform. A pressurized water delivery system can be coupled to the floating powerhouse and can accommodate vertical and/or horizontal movement of the floating power house. The pressurized water delivery system can include a segmented penstock coupling the turbine to an intake, and individual segments of the penstock can be free to rotate about a substantially horizontal axis, such that in response to variations in a tailwater height, the floating platform rising and falling does not disrupt fluid flow from a fluid source.

A water directing and distribution system (WDDS) that functions in combination with a natural or man-made water source. The WDDS includes a main pipe with an intake and a termination point. The main pipe is placed into or adjacent to the water source, at a depth below the water source's surface. Water from the water source enters the pipe at the intake and flows through the pipe by force of gravity. The water is maintained within the pipe and directed through the pipe at a lower level than the water source's origination point. Water from the pipe can be accessed via taps placed along the pipe. The water can also be directed to a water storage structure(s) and can be purified for human or animal consumption.

A system for storing energy includes a body and a shaft having walls defining an internal volume for containing a fluid, a seal member disposed between the body and the walls of the shaft, and a fluid passage in fluid communication with the shaft. The body is disposed within the internal volume of the shaft for movement with gravity from a first elevation position to a second elevation position within the internal volume of the shaft. The seal member divides the internal volume into a first portion located below the body and a second portion located above the body. The fluid passage communicates fluid with the first portion of the interior volume of the shaft. The system further includes a pump/turbine operatively coupled with the fluid passage to drive a motor/generator to generate electricity upon movement of the body from the first elevation position to the second elevation position.

A system for storing energy includes a body and a shaft having walls defining an internal volume for containing a fluid, a seal member disposed between the body and the walls of the shaft, and a fluid passage in fluid communication with the shaft. The body is disposed within the internal volume of the shaft for movement with gravity from a first elevation position to a second elevation position within the internal volume of the shaft. The seal member divides the internal volume into a first portion located below the body and a second portion located above the body. The fluid passage communicates fluid with the first portion of the interior volume of the shaft. The system further includes a pump/turbine operatively coupled with the fluid passage to drive a motor/generator to generate electricity upon movement of the body from the first elevation position to the second elevation position.

A shaft power plant for generating electricity by energy conversion of an outflow between upper water and lower water in a river includes at least two power plant modules, each having a vertical shaft with an open top and a shaft crown forming an inflow plane. The inflow plane is substantially parallel with the river bed and extends below a water level of the upper water. Each of the power plant modules also has a turbine generator unit arranged in the shaft. The power plant also includes an ecological connecting channel formed as an outflow from the upper water into the lower water without generating electricity by energy conversion.