An arrangement for generating energy made up of at least two rotating bodies of revolution partially immersed in a dynamic fluid. The at least two rotating bodies of revolution have their longitudinal axis of rotation located perpendicularly to the flow of the fluid, and are further associated to support means and to drive means, being immersed about 30% of their diameter. One of the at least two rotating bodies of revolution is located upstream of said dynamic fluid with its longitudinal axis of rotation located in a longitudinal slider of the support means with the possibility of translation and variable rotation speed. The other of the at least two rotating bodies of revolution is located downstream of the dynamic fluid, with its longitudinal axis of rotation being attached to the support means, and with a rotation synchronized with the flow speed of the dynamic fluid.

Mechanical movement exerted upon or over roadways is transmitted and converted to mechanical movement conducive towards the production of electrical energy. In one disclosed system, ramped or angled push bars are disposed within a roadway, such that a front set of bars and back set of bars will not be moved simultaneously. A series of one way values may enable subterranean fluid chambers to move a pendulum flywheel or rotor in a continuous direction or in a back and forth movement.

A gravitational vortex water turbine assembly is described wherein the water turbine is disposed below the bottom of the basin in which the vortex is induced. Preferably, the basin comprises a spiral-shaped side wall and the rotor blades of the turbine rotor are dimensioned such that they absorb the tangential, axial and radial component of the water flow of the vortex.

The present invention relates to a movable and semi-submerged power generator using a waterwheel turbine, which can easily be moved to a location where a flow of a fluid occurs, prevents movement by current of water due to being a semi-submerged type, and efficiently produces energy by means of a flow rate control and cutoff of the fluid and expansibility of the turbine. The power generator comprises: an upper structure having first and second structures including first and second balancing tanks and first and second machine rooms; a lower structure disposed on the lower portion of the upper structure and including a fluid flowing hole, a first round, and a fluid guide hole through which the fluid can flow; a turbine rotated by the movement of the fluid; an energy generation means for producing electricity by the turbine; and a fixing means. Thus, the power generator is floatable and movable on water so as to be moved to and installed in various locations. The first and second balancing tanks are filled with the fluid such that the power generator can be semi-submerged, and the height of the turbine is disposed at a position so that a shaft can be placed above the water surface such that the turbine is smoothly rotated, while preventing shaking by waving of the fluid and turning of the power generator, thereby improving energy production efficiency. Also, the fluid under the water surface is guided in a direction capable of operating the turbine while maximally preventing disruption to the flow of the fluid moving to the turbine through the first round of the lower structure, thereby improving energy production efficiency.

The invention provides a system for the extraction of energy from an underwaterflow stream in a body of water. The system comprises a support frame which comprises a plurality of receptacles for mounting functional modules on the support frame. The plurality of receptacles are arranged to form a horizontally-distributed two-dimensional array on the support frame. The plurality of vertical axis turbine units is configured to be interchangeably mounted in the receptacles.

An enclosed hydroelectricity generator system includes an inlet channel, a low-pressure enclosed turbine, an outlet channel, and a hydroelectric generator. The enclosed turbine includes an inner can, an outer housing, a turbine axle, a plurality of paddle boards, and a water pressure containment chamber. The turbine axle is concentrically and symmetrically connected to the inner can. The plurality of paddle boards is radially connected around the inner can. The inner can and the plurality of paddle boards are rotatably enclosed within the outer housing. The inlet channel and the outlet channel are oppositely traversing into the outer housing. The inlet channel is in fluid communication with the outer channel through the water pressure containment chamber. The hydroelectric generator is operatively coupled with the turbine axle so that a kinetic energy of a pressurized water flow that enters into the water pressure containment chamber can be converted into hydroelectricity.

A method of automatically extracting energy from flowing liquid and a device using the same are disclosed. The device includes a paddle rod and a swing device. The paddle rod includes two paddles to bear a pushing force of flowing liquid. When the paddle rod is swung, one of the two paddle enters water and the other paddle leaves from water surface. When the paddle in the water bears a pushing force of flowing liquid to drive a rotary body to swing, the paddle rod moves upwardly and leaves the water surface, and the other paddle enters water to bear the pushing force, and after the rotary body is driven to swing reversely, the paddle rod moves upwardly and leaves water surface, and at the same time the paddle enters the water to bear the pushing force, to drive the rotary body to swing reversely.

A method of automatically extracting energy from flowing liquid and a device using the same are disclosed. The device includes a paddle rod and a swing device. The paddle rod includes two paddles to bear a pushing force of flowing liquid. When the paddle rod is swung, one of the two paddle enters water and the other paddle leaves from water surface. When the paddle in the water bears a pushing force of flowing liquid to drive a rotary body to swing, the paddle rod moves upwardly and leaves the water surface, and the other paddle enters water to bear the pushing force, and after the rotary body is driven to swing reversely, the paddle rod moves upwardly and leaves water surface, and at the same time the paddle enters the water to bear the pushing force, to drive the rotary body to swing reversely.

An accelerator and water turbine assembly is provided for mounting in a tidal stream having a water turbine (12) and a water flow accelerator for providing a turbine driver current having a speed greater than that of the uninterrupted ambient tidal stream in which the accelerator has an accelerator body member (11) having a water flow facing front face (13) and side faces (14) depending therefrom around which the water flows adjacent each of the side faces as a turbine driver current and in which the water turbine (12) is mounted to be at least partially shrouded by the accelerator body member from the accelerated turbine driver current flowing adjacent and relatively close to a side face of the accelerator where the water flow achieves substantially maximum velocity and in which the accelerator is laterally spaced apart from the turbine driver current modifying effect of any other flow obstruction.

Embodiments of a hydroelectric system for a dam can include a module anchored to a downstream face of the dam, the module including a protective housing that can include a Coanda-effect screen, a turbine housing retained within the protective housing, the turbine housing including an upper inlet portion at a first end, a substantially tubular portion, and a lower outlet portion at a second end, the upper inlet portion being positioned above the lower outlet portion, a turbine retained at least partially within the turbine housing, the turbine including a plurality of blades coupled with a central shaft, and a fluid pump, the fluid pump being coupled with the central shaft, where the fluid pump is configured to pump a high pressure fluid, a fluid circuit, the fluid circuit including piping, where the high pressure fluid is retained within the piping, and a generator, the generator being coupled with the fluid circuit, where the generator is driven by the high pressure fluid that is pumped by the fluid pump in response to the rotation of the turbine.