A floating drum turbine is used for generating the electrical energy from the kinetic energy of a water stream (sea wave or river flow) that provides the mechanical energy needed to rotate an electrical generator for generating the electricity. The drum turbine is installed on a buoyant skid anchored to the seabed by some chains/ropes to keep it in a fixed position and direction along the water stream. The turbine is coupled to an electrical generator with a power transmission system, and generates the electricity that is transferred to the coast using a cable system floated on the water surface.

The invention relates to a floatable hydroelectric generator (10) for harvesting electrical energy from the flow (R) of water in a river. The generator assembly (10) includes a floatable chassis (12) to which are connected two spaced-apart rotational axles (18). An electrical generator (not shown) is mounted on the floatable chassis (12) and coupled to the rotational axles (18). A chain (20) is connected to the rotational axles (18) via pulley wheels (16). A plurality of water receptacles (22) are fixed to the chain (20), and each being orientated, when submerged, to present their major openings towards an oncoming waterflow direction (R). A plurality of minor openings (24) is provided through a wall of each water receptacle (22). A valve member in the form of a flexible flap (26) is located within each water receptacle (22) for controlling passage of water through said minor openings (24). The flexible flap (26) is adapted to selectively permit flow of water through the minor openings (24) into each water receptacle (22); but substantially prevent flow of water through said minor openings (24) out of each water receptacle (22). The generator assembly (10) of the present invention may be deployed at a desired location within a river—optionally as part of a larger array of such assemblies—to generate electricity on a substantially continuous basis.

The wind turbine includes a wind driven turbine wheel rotatable about a central axis that has blades with streamers of other articles to fill the space between the blades. A set of streamers can be attached to the trailing edge of the blades at one end and including a free end wherein the free end is disposed in a space defined between adjacent blades. The streamers can also be attached to spokes.

A device for extracting energy from flowing fluid is provided. First and second buoyant lateral side members are provided. A fluid turbine is disposed between and below the lateral side members. At least one support extends from each side member to the turbine. At least one adjustable length support connects to the first and second side members, the at least one adjustable length support being adjustable between a minimum length and a maximum length. When a length of the adjustable length support adjusts toward the minimum length the first and second side members move closer together to thereby lower the turbine relative to the lateral side members. When the length of the at least one adjustable length support adjusts toward the maximum length the first and second side members move away from each other to thereby raise the turbine relative to the lateral side members.

A floating electrical power generator having a three-dimensional (3D) flow passageway configured for increasing the water flow on the paddle wheel to increase the power output.

Disclosed are wind turbines suitable for floating application. The wind turbines include multiple floats and multiple towers connected to the floats, a turbine rotor, including a hub and a plurality of blades, structurally supported by the plurality of towers, the turbine rotor coupled to an electrical generator; and have a very shallow draft even for rated capacities of at least 1 MW. The wind turbines can have a single mooring line for yawing eliminating the need for a nacelle, and can allow for deck-level belt driven electrical generators without the need for gear boxes.

A wind turbine system comprises a vessel; a wind turbine mounted to the vessel, the wind turbine comprising rotor blades configured to convert an airstream to rotational shaft power, and an electrical generator configured to convert the rotational shaft power to electrical power; a hydrogen production system configured to be powered by the electrical generator; a propulsion system configured to propel the vessel via power from the electrical generator; and a steering system to control orientation of the vessel relative to the water and the airstream. A method of producing hydrogen comprises floating a vessel in open sea in areas of wind; rotating a wind turbine with the wind to produce electrical energy; synthesizing hydrogen gas from seawater utilizing the electrical energy from the wind turbine; storing the hydrogen gas in a storage system transported by the vessel; and offloading the hydrogen from the storage system.

A hydroelectric energy system includes a turbine including a stator and a rotor. The rotor is disposed radially outward of the stator and is rotatable around the stator about an axis of rotation. The system also includes a mechanical power conversion assembly including a gear operably coupled to a generator. The system further includes a mechanical power transmission assembly operably coupling the rotor to the gear. The rotor includes a plurality of blades configured to rotate in response to fluid flow interacting with the plurality of blades. The mechanical power conversion assembly is at a location spaced from the axis of rotation by a distance larger than a radial sweep of the blades. The mechanical power transmission assembly is configured to transmit the rotation of the rotor to the gear.

Aspects of the disclosure disclose a turbine that includes multiple rotating sails and multiple stationary sails. A mastless vertical axis wind turbine includes a first plurality of sails that are configured to rotate about a vertical axis under the influence of wind. A platform is coupled to the first plurality of sails. During operation of the mastless vertical axis wind turbine, the platform is in tension with the first plurality of sails at one or more points about a particular end of the first plurality of the sails. The mastless vertical axis wind turbine also includes a second plurality of sails having respective first ends that are coupled together and second ends that are each coupled to one or more stationary surfaces. The second plurality of sails are configured to remain stationary as the first plurality of sails rotate under the influence of the wind.

Disclosed is a water turbine including an endless chain with buckets and two floats disposed on either side of the chain, the chain driving electricity generators.