A system is provided comprising a tunnel for immersion in a moving mass. Energy from the mass passing through said tunnel converts to rotational force. An energy collector is provided having open and collapsed states, the open state resisting the mass. Bidirectional converter systems convert said rotational force to constant singular direction. A mechanical converter comprises an input shaft turned bidirectionally by said rotational force and two gears driven by the input shaft in opposite rotational directions, the gears separately attached to idler gears causing output gears attached to the idler gears to engage an output shaft in a same rotational direction. A hydraulic converter comprises a hydraulic pump turned bidirectionally by said rotational force. Check valves positioned between the pump and a hydraulic motor enable control of pressure and volume in one direction at the pump.

A system for the generation of energy from the flow of water in a body of water is provided, the system comprising a support assembly extending across at least a portion of the body of water; a generator assembly mounted in the support assembly, the generator assembly comprising a first rotor assembly and a second rotor assembly, each rotor assembly comprising a vertical hub rotatable about a vertical axis and a plurality of vertical blades extending radially from the hub, the first and second rotor assemblies being arranged such that the volume swept by the blades of the first rotor assembly overlaps the volume swept by the blades of the second rotor assembly. The system may be used to generate energy, for example electricity. In addition, the system may be used to control the level of water on the upstream side of the installation, for example in the cases of flooding.

Wave-power plant where the waves are guiding water into a basin, and where power is produced when water flows back into the sea through a turbine. The basin exhibits a bottom (4) positioned at least several typical wave heights down into the water, a rear wall (3), two side walls (2), a front wall (1) fronting the waves, and for larger plants, at least one partition wall (5) dividing the basins into several smaller basins. The front wall (1) and one or more division walls (5) are covered by apertures provided with check-valves (6) to allow through flow toward rear basin (14) providing water to at least one turbine (8). The basin can rest with its bottom (4) directly upon the seabed (13), and in deeper waters, above the seabed with the bottom (4) of the basin also being covered by apertures exhibiting check valves (6) for flow into the basin.

An electrical generation system based on tidal flow includes a reservoir and a fluid inlet tube extending between a tidal source and the reservoir. The inlet tube has at least one inlet turbine generator disposed therein. The fluid inlet tube extends along a first level. A fluid outlet tube extends between the reservoir and the tidal source. The fluid outlet tube has at least one outlet turbine generator disposed therein. The fluid outlet tube extends along a second level vertically lower than the first level. During high tide at the tidal source, tidal fluid flows from the tidal source, into the fluid inlet tube, past the at least one inlet turbine generator, and into the reservoir and during a low tide at the tidal source, the tidal fluid flows from the reservoir, into the fluid outlet tube, past the at least one outlet turbine generator, and to the tidal source.

A power generation complementary system for tidal range power generation and construction, which provides a bay construction tidal range power generation facility to carry out reciprocal and complementary power generation in response to the changing high and low tide levels at tidal time curve turning points, to produce stable power output. The system is constructed with a reserve weir pool facing the direction of incoming ocean tidal energy. The reserve weir pool is divided into a left pool area and a right pool area, which are respectively equipped with an energy conversion equipment associated therewith. According to the state of a tidal time curve, mutually dependent control devices relay an instruction to sequentially handover operation from one conversion equipment to the other conversion equipment, thereby enabling the system to receive quantities of energy and carry out complementary power generation at the appropriate times.

Methods, systems and apparatuses including systems and methods that can be used for operating a water turbine such as along one or more flow channels of a tidal estuary for power generation is disclosed. The water turbine can be positioned within the one or more flow channels and can be turned by the flow of the water from the estuary.

Methods, systems and apparatuses including systems and methods that can be used for operating a water turbine in combination with a system including a plurality of tidal estuaries and flow channels created by human activity for power generation and further including plurality of man-made dams communicating with at least some of the tidal estuaries and the flow channels.