A system that maintains the relative and/or absolute geographical positions of two or more buoyant devices floating in a body of water. A plurality of formation restoring tethers are disclosed which permit the unrestricted vertical movement of networked buoyant devices, while resisting increases in their lateral separations by providing restoring forces to oppose such separations. Tensioning mechanisms incorporated into the tethers generate the resistance to the lateral separations of two or more entities by transforming such separations into an increase in the potential energy stored within such tensioning mechanisms, the potential energy of which is released in the process of restoring the original separations and/or positions of the displaced buoyant devices.

A system includes a water turbine, a plurality of positioning winches coupled to the water turbine and a plurality of positioning cables. An individual positioning cable extends between a fixed point at a first end and the water turbine at a second end and is coupled to a corresponding positioning winch that is configured to extend and retract the individual positioning cable between the fixed point and the water turbine. A plurality of sensors is configured to sense water conditions around the water turbine. A position control system is connected to the plurality of positioning winches and connected to the plurality of sensors. The position control system is configured to position the water turbine using the plurality of positioning winches according to the water conditions sensed by the plurality of sensors.

A wave power generation unit suitable for large-scale application and a system thereof are disclosed. The wave power generation unit includes at least two types of water platforms that dynamically differ from each other under the effect of waves: stationary floating platform and movable floating platform. The two types of floating platforms are paired to form a functional unit, and the difference between the two floating platforms caused by waves causes interactions between the two floating platforms. The movable floating platform converts wave energy into mechanical energy, and the stationary floating platform converts machinery energy into electrical energy. The dynamic features of the floating platform are adjusted by a sink and float control device or a peripheral lifting device, and the adjustment effect is enhanced by a large-mass flywheel. Multiple wave power generation units form a wave power generation system.

A mooring arrangement for a floating device includes a band and a drum adapted to pay out and pull in the band. The mooring arrangement includes a band guide, the band is extending from the drum via the band guide and is adapted to be coupled to an anchoring arrangement, the band guide being configured to tilt about an articulation axis being parallel with a longitudinal axis of the part of the band situated between the drum and the band guide in order to position the band to compensate for movement in the floating device and thus reduce the wear in the band.

A passive heave compensator, including an elastic cable, an electromagnetic damping device, a cylindrical sector, and a disc damping plate. The electromagnetic damping device includes a first cylinder including a helical coil, a permanent magnet mechanism disposed in the first cylinder, a first cover plate, a second cover plate, a first sliding shaft, a second sliding shaft, a first spring, a second spring, a first end cover, and a second end cover. The cylindrical sector includes a roof plate, a middle plate, a base plate, a first side plate, a second side plate, and a curved plate. The disc damping plate is disposed around the middle plate of cylindrical sector. The elastic cable is directly connected to the electromagnetic damping device. The electromagnetic damping device is disposed in the central part of the cylindrical sector. The middle plate is disposed between the roof plate and the base plate.

The present invention relates generally to the offshore renewable energy utilization technology. A novel floating wind-wave integrated power generation system is based on the braceless semi-submersible floating wind turbine concept and the oscillating water column (OWC) wave energy generator. The integrated system includes the offshore wind energy system and the oscillating water column wave energy system. The novel floating wind-wave integrated power generation system transfers the rise and fall movement of the water column into the air in and out movement which is converted into the electricity by the air turbine generator. This invention makes good use of pontoons at of the semi-floating platform and the mooring lines. Since the wave energy system will move with the wave movement, which will reduce the power generation efficiency. The pontoon can help to mitigate this movement. The mooring system can further prevent the movement of the wave energy device. This invention uses the braceless structure, which simplifies the construction process and reduce the fatigue issues for the braces. Compared with the traditional three columns semi-submersible wind turbine, this invention enlarges the water plane area. The moment of inertia for hydrostatic stability is enhanced, and the stability of the floating foundation is improved.

A turbine comprises a shaft (20), a mass (10) eccentrically mounted for rotation about shaft (20), having its center of gravity at a distance from the shaft (20) and a motion base (15). Motion base (15) rigidly supports the shaft (20), and is configured for moving the shaft (20) in any direction of at least two degrees of movement freedom, except for heave. A floating vessel-turbine (120), encloses entirely the eccentrically rotating mass (10) and the motion base (15). The turbine converts ocean wave energy into useful energy, very efficiently.

The wave-powered electricity generator is an energy conversion device. The wave-powered electricity generator converts a potential energy formed in waves found in open water into rotational energy that can be used to power an electric generator. The open water is a body of naturally occurring water. The wave-powered electricity generator is a floating structure that is placed in the open water. The wave-powered electricity generator: a) captures water from the open water from a location that is above the median water level; b) forms a water flow path that transports the captured water into a turbine; wherein the turbine subsequently; c) generates rotational energy from the transported water. The wave-powered electricity generator comprises a containment pan, the turbine, and an anchor structure. The turbine mounts in the containment pan. The anchor structure anchors the floating invention to the bottom of the open water.

Example implementations include a system and method of using plastic from bodies of water and creating a floating platform by collecting plastic from a body of water, cleaning the collected plastic, melting and compacting the plastic, molding a plurality of hexagonal blocks from the compacted plastic, stacking the plurality of hexagonal blocks, wherein a system of springs and an energy storage device is provided between each of the plurality of hexagonal blocks, and coating the stacked blocks with a non-toxic material. Through the use of various onboard functionalities, energy may be generated to regulate temperature and provide electricity, oxygen may be supplied, and water may be purified.

A mooring system for an Ocean Wave Energy Converters (OWEC) includes multiple structural members such as legs and braces that are linearly extendible and connected using mobile joints, each joint providing two degrees of freedom for rotations about the joint. Mobile joints also attach bottom ends of the legs to mooring points. A jacking system can change lengths of the extensible structural members to adjust depth of the OWEC for operation or for storm safety, to lift the OWEC out of the water for maintenance, or to align the OWEC to an incoming wave direction.