A wave energy conversion cylinder includes an outer cylinder and a center rod disposed along an axis of the outer cylinder. A plurality of electrically-conductive windings are disposed about an inner circumference of the outer cylinder. A magnet is slidably disposed on the center rod. A buoyancy cylinder is disposed outwardly of the outer cylinder. A first moveable ring weight may be slidably disposed along the axis of the center rod and a second moveable ring weight may be slidably disposed along the axis of the center rod. The first moveable ring weight and the second moveable ring weight facilitate control to tune a mass moment of inertia of the wave energy conversion cylinder.

A hydroelectric energy system in accordance with the present disclosure includes a stationary ring structure including a stationary ring foundation and a stationary ring backing. The system also includes a rotating ring structure including a rotating ring foundation and a blade support ring disposed radially outward of the rotating ring foundation. The rotating ring foundation is disposed radially outward of the stationary ring foundation and is configured to rotate around the stationary ring foundation about an axis of rotation. The system further includes at least one bearing mechanism configured to support the rotating ring structure relative to the stationary ring structure during rotation of the rotating ring foundation around the stationary ring foundation. During the rotation, the stationary ring backing is configured to be in compression and to support the stationary ring foundation, the rotating ring foundation, and the blade support ring in a stacked configuration within a fluid current.

Discloses herein a submersible power generation platform. The submersible power generation platform a power generation unit (10) including blades (11) configured to be rotated by flowing water (1) and a generator (13) configured to receive rotational force and to generate electricity; a frame (20) configured to fasten the power generation unit (10) therein so that the blades (11) are disposed toward a front location from the flowing water (1) enters; a pair of buoyant objects (30) configured to be disposed on both sides of the frame (20), and to float the frame (20); and one or more fastening ropes (40) configured to fasten the buoyant objects (30), wherein one end of each of the fastening ropes (40) is coupled to a balance center portion on the outer surface of a corresponding one of the buoyant objects (30) or an upstream portion of the buoyant object (30).

Discloses herein a submersible power generation platform. The submersible power generation platform a power generation unit (10) including blades (11) configured to be rotated by flowing water (1) and a generator (13) configured to receive rotational force and to generate electricity; a frame (20) configured to fasten the power generation unit (10) therein so that the blades (11) are disposed toward a front location from the flowing water (1) enters; a pair of buoyant objects (30) configured to be disposed on both sides of the frame (20), and to float the frame (20); and one or more fastening ropes (40) configured to fasten the buoyant objects (30), wherein one end of each of the fastening ropes (40) is coupled to a balance center portion on the outer surface of a corresponding one of the buoyant objects (30) or an upstream portion of the buoyant object (30).

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.

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 working end of a rotary shaft extends through a bearing supported at a distal end of a cantilever housing, the shaft's working end being subjected to transverse loading. The bending stiffness of the system is matched so that the angular deflection of the shaft and supporting cantilever housing are coordinated to minimize angular misalignment at the bearing. A cantilever system provides for apparatus and methodology demonstrating arrangements characterized by an operational ease for submersion of the working end in a fluid and ease of access to the bearing. Mitigation of misalignment enables the use of radial bearings.

A working end of a rotary shaft extends through a bearing supported at a distal end of a cantilever housing, the shaft's working end being subjected to transverse loading. The bending stiffness of the system is matched so that the angular deflection of the shaft and supporting cantilever housing are coordinated to minimize angular misalignment at the bearing. A cantilever system provides for apparatus and methodology demonstrating arrangements characterized by an operational ease for submersion of the working end in a fluid and ease of access to the bearing. Mitigation of misalignment enables the use of radial bearings.

In accordance with one aspect of the present disclosure, a method for generating hydrogen is provided. The method includes producing AC electric current from a hydroelectric turbine deployed under water at an offshore site. The method also includes converting the AC electric current into DC electric current and applying the DC electric current to an electrolyzer positioned above water at the offshore site of the hydroelectric turbine. The method further includes generating hydrogen via the electrolyzer.

Various embodiments of an underwater power generation apparatus are provided. In one embodiment, an underwater power generation apparatus is provided, comprising: a conduit having a bore defined by an interior surface of the conduit, the bore comprising a void extending about a length of the conduit; an exterior cylinder, the conduit oriented within the exterior cylinder, and the conduit rotatable relative to the exterior cylinder; at least three bearings oriented between the conduit and the exterior cylinder; at least one blade having a first blade direction, the at least one blade having a first blade direction oriented on the interior surface of the conduit at a first end of the conduit; and at least one blade having a second blade direction, the at least one blade having a second blade direction oriented on the interior surface of the conduit at a second end of the conduit.