A device for producing energy includes an air-towed vessel, and at least one water current turbine linked to the vessel by at least one electric cable. The water current turbine is linked to the vessel by at least one mechanical linking cable to be towed by the vessel. The water current turbine is spaced apart from the vessel, which makes it possible to increase the diameter of the turbine and to reduce the interactions between the turbine and the vessel. Moreover, it is then possible to provide a plurality of water current turbines towed by the same vessel.

As underwater pumped storage power plant reservoir in a dry but floodable ground depression, comprises a modular arrangement of several individual pressure vessel modules for the intermediate storage of electrical energy from other power plants, wherein the pressure vessel modules each have an outer wall with at least one flow-through opening for letting in and/or letting out water and can each be filled with water and/or pumped empty independently of one another when the dry ground depression is flooded with water, and wherein the modular arrangement of the pressure vessel modules is designed in such a way that the pressure vessel modules are arranged with respect to one another in the dry ground depression with their outer wall face-to face adjacent to one another.

A vertical twin rotor water turbine apparatus and method for extracting energy from a flow of water is described herein. The described apparatus delivers favorable performance by virtue the operation of a novel configuration of a plurality of central cores with at least one blade member extending from each core and flow directors to increase the effectiveness and efficiency of said device.

A sea wave energy converter system, including a plurality of pioneer devices each of which is mounted on individual towers installed at a seabed, wherein each of the pioneer device includes an assembly having a set of gears connected to at least one fly wheel, at least one paddle, and a generator, wherein each of the pioneer devices mounted on the individual towers are lined-up in a particular arrangement covering a length of a sea crest so that incoming kinetic forces of sea waves rotates seriatim the at least one paddle of each of the pioneer devices to rotate the generator through the set of gears to generate electricity individually by each of the pioneer devices and wherein the particular arrangement is one of a diagonal arrangement, a cross arrangement, and a ‘V’ shaped arrangement.

A vertical twin rotor water turbine apparatus and method for extracting energy from a flow of water is described herein. The described apparatus delivers favourable performance by virtue the operation of a novel configuration of a plurality of central cores with at least one blade member extending from each core and flow directors to increase the effectiveness and efficiency of said device.

Crossflow axes rotary mechanical devices with dynamic increased swept area including at least two rotors attached to a support structure having their axes of rotation parallel to each other, having at least one blade attached to each rotor via a joint where the swept areas created by the blades of each rotor intersect, having at least one rotor synchronizing component so the blades from each rotor do not collide during the rotation are described. The rotors with blades share the space, the support structure, the rotor synchronizing component, the electric machines, as well as the characteristics, parameters, and effects that the crossflow axes rotary mechanical devices with dynamic increased swept area have compare to the crossflow axes rotary mechanical devices without dynamic increased swept area.

A vertical twin rotor water turbine apparatus and method for extracting energy from a flow of water is described herein. The described apparatus delivers favourable performance by virtue the operation of a novel configuration of a plurality of central cores with at least one blade member extending from each core and flow directors to increase the effectiveness and efficiency of said device.

A sea wave energy converter system, comprising a plurality of pioneer devices each of which is mounted on individual towers installed at a seabed, wherein each of the pioneer device comprises an assembly having a set of gears connected to at least one of a fly wheel, at least one paddle, and a generator, wherein each of the pioneer devices mounted on the individual towers are lined-up in a particular arrangement covering a length of a sea crest so that incoming kinetic forces of sea waves rotates seriatim the at least one paddle of each of the pioneer devices to rotate the generator through the set of gears to generate electricity individually by each of the pioneer devices and wherein the particular arrangement is one of a diagonal arrangement, a parallel arrangement, a cross arrangement, a horizontal arrangement, and V shaped arrangement.

A floating type offshore wind power generation facility includes: a wind power generation unit which is installed to be horizontally rotatable about a vertical rotation center while being placed in an inclined state on an offshore structure or installed to be rotatable in two directions about a horizontal rotation center of the offshore structure, and converts rotational kinetic energy of blades caused by sea wind into electrical energy; and a driving unit which is connected to a lower end of the wind power generation unit in a state in which the driving unit is installed on the offshore structure, and changes a pivoting angle or a rotating angle of the wind power generation unit by generating driving power.

An apparatus comprising a meter device with a rotating component configured to rotate in response to a flowing fluid, an indexing unit coupled with the meter device and configured to process signals from the meter device resulting in values for measured parameters of a flowing fluid, and an energy harvester coupled to the pair of impellers, the energy harvester comprising a first harvesting unit and a second harvesting unit that co-operate to generate an electrical signal, the first harvesting unit configured to co-rotate with the pair of impellers, the second harvesting unit comprising a hollow, magnetic core disposed proximate the first harvesting unit.