Aspects of the disclosure include a tidal power generator comprising a first container, at least one second container pivotably coupled to the first container, a frame pivotably coupled to the first container, a first valve, associated with the first container, configured to selectively control ingress of a first volume of a first fluid into the first container, and a second valve, associated with the first container, configured to selectively control egress of a second volume of the first fluid out of the first container.

A tide-activated power system for deriving energy from the periodic rise and fall of the level of a body of water includes a float/weight barge for rising and falling with the level of the body of water. A hydraulic cylinder has a piston that defines a pair of variable size chambers and for forcing the working fluid as the barge rises or falls. The cylinder has an intake port and an output port associated with each of the variable size chambers. A valve associated with the output port is adapted for limiting the flow of the working fluid and, thus the movement of the piston. A flow control system directs working fluid forced from the variable size chamber that is decreasing in size as the barge rises or falls towards an energy conversion mechanism and directing working fluid from the energy conversion mechanism to the other variable size chamber.

A rotor shaft unit for a tidal system, which tidal system includes a main frame and a rotor and a housing connected to the rotor, includes a rotor shaft configured to be connected to the main frame, at least one bearing unit for rotatably supporting the housing for rotation relative to the rotor shaft, and a sleeve configured to be mounted in the main frame, the sleeve being disposed around a first end portion of the rotor shaft and connected to the rotor shaft by a friction connection. Also a tidal system including the rotor shaft unit.

A wind energy, wave energy and tidal energy integrated power generation system based on monopile foundation, in which the wind energy, wave energy and tidal energy will share the support structure and power transmission system, belongs to the technical field of ocean renewable energy utilization. An integrated power generation system which integrates wind energy converter, oscillating water column wave energy converter and horizontal-axis tidal energy converter is established based on the monopile support structure. The invention makes sufficient use of offshore renewable resources, so as to improve the utilization ratio of monopile foundation and reduce the total cost of power generation of integrated system. The novel integrated power generation system improves the effective utilization of the ocean areas, reduces the cost of construction and maintenance, makes full use of the existing mature wind energy technology, and promotes the commercialization of wave energy converters and tidal energy devices.

A wave power generation device comprises a floating energy harvester (1), a plurality of energy conversion levers (2) and a plurality of energy transferring rods (3) suspended around the floating energy harvester (1); one end of the energy transferring rod (3) is connected to the floating energy harvester (1), and the other end is sleeved onto the lower end of the energy conversion lever (2); the energy transferring rod (3) transfers energy harvested from a horizontal movement of a wave by the floating energy harvester to the energy conversion lever (2), and follows the vertical motion of the energy conversion lever (2) as the surface of the sea rises and falls; an upper end of the energy conversion lever (2) is connected to a first working mechanism (102), and a lower end of the energy conversion lever (2) is submerged in seawater.

Devices, systems and methods for real-time wave monitoring are described. One example method for real-time monitoring of wave conditions includes receiving, from a buoy over a first wireless communication channel, information based on continuously monitoring one or more characteristics of the wave conditions, receiving, from a user device over a second wireless communication channel, user preferences, and transmitting, to the user device over the second wireless communication channel, a message based on the information and the user preferences in response to a user request. Another example method includes transmitting, to a remote server, user preferences and a user request, and receiving, from the remote server and in response to the user request, a message based on the user preferences and information corresponding to the wave conditions. In these methods, the time duration between communication of the user request and the information acquisition may be less than a predetermined value.

The disclosure defined by this invention provide a tidal current power generator capable of maximizing the force, which is generated by tidal current flows, through changing operating direction itself without any manual operation when water flow direction is changed. According to an exemplary embodiment, a tidal current power generator includes a main frame; a plurality of operating bodies; a plurality of power plates configured to forcibly move the plurality of operating bodies in the direction of the tidal current by the force of the tidal current; a pair of clutch jaws engaged with or spaced from each other by axial movement of an outer pipe; a locking part configured to move the outer pipe so that each of the clutch jaws is engaged with each other; and a release part configured to move the outer pipe so that each of the clutch jaws is spaced apart from each other.

A wave power generation device comprises a floating energy harvester (1), a plurality of energy conversion levers (2) and a plurality of energy transferring rods (3) suspended around the floating energy harvester (1); one end of the energy transferring rod (3) is connected to the floating energy harvester (1), and the other end is sleeved onto the lower end of the energy conversion lever (2); the energy transferring rod (3) transfers energy harvested from a horizontal movement of a wave by the floating energy harvester to the energy conversion lever (2), and follows the vertical motion of the energy conversion lever (2) as the surface of the sea rises and falls; an upper end of the energy conversion lever (2) is connected to a first working mechanism (102), and a lower end of the energy conversion lever (2) is submerged in seawater.

A wind energy-wave energy-tidal energy integrated power generation system based on monopile foundation, in which the wind energy, wave energy and tidal energy will share the support structure and power transmission system, belongs to the technical field of ocean renewable energy utilization. An integrated power generation system which integrates wind energy converter, oscillating water column wave energy converter and horizontal-axis tidal energy converter is established based on the monopile support structure. The invention makes sufficient use of offshore renewable resources, so as to improve the utilization ratio of monopile foundation and reduce the total cost of power generation of integrated system. The novel integrated power generation system improves the effective utilization of the ocean areas, reduces the cost of construction and maintenance, makes full use of the existing mature wind energy technology, and promotes the commercialization of wave energy converters and tidal energy devices.

A wave electricity generator system includes a water craft, a reinforcement beam mounted to a bottom of the watercraft, a power generating unit and a leverage assembly. The leverage assembly includes a connection unit disposed on the watercraft, and a lever 62 connected to the power generating unit and the connection unit. The connection unit includes a rope retaining seat, a rope and a protective pad. The rope retaining seat is disposed above the watercraft and connected to the lever. The rope is disposed around the watercraft, threads through the reinforcement beam, and is connected to the rope retaining seat. The protective pad is disposed between the reinforcement beam and the rope.