A system for converting wave energy into electricity is provided. The system includes a wave energy mechanical interface, a power take off coupled with the wave energy mechanical interface, and a generator coupled with the power take off. A controller is coupled with the power take off. The controller is configured to regulate impedance of energy transferred from the power take off to the generator.

An example system comprises an enclosure configured to be submerged in a body of water. The system also comprises a capture device coupled to the enclosure. The capture device includes a rotor shaft and a plurality of blades coupled to the rotor shaft. The plurality of blades are arranged to receive a flow of water when the enclosure is submerged in the body of water. The flow of water causes the plurality of blades to rotate the rotor shaft. The system also comprises a transfer device extending lengthwise from a first end to a second end of the transfer device. The transfer device is mechanically coupled to the capture device at the first end and configured to transfer a torque of the rotating rotor shaft from the first end to the second end. The second end is located outside the enclosure.

Systems and methods for harnessing hydro-kinetic energy. The system includes a single central axle, a plurality of vanes, and a generator. The plurality of vanes may be configured to rotate about the central axle. Each vane may include a frame and a panel rotatably attached the frame. The panel may comprise a plurality of channels having a C-shaped cross-section. Movement of surrounding water may cause the panel to rotate relative to the frame between an open and closed position. The generator may be configured to convert the rotational motion of the plurality of vanes into electrical energy.

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.

This disclosure is directed to hydrodynamic electric generators, including their structural design, methods of deployment, anchoring systems, drive systems and control systems. The system can be scaled from ones that can be hand carried to large, stationary devices that can generate up to and greater than 20 kw in a current of 3 knots. In a stationary system, the device can be anchored to an underwater floor by an anchoring device supported by four adjustable legs. These legs can eliminate the need for extensive mooring lines, providing the device with a small footprint that is non-hazardous to marine animals or vegetation. Individual components, such as rotors, generators and other mechanical components can be modularly installed for easy removal and servicing without having to disturb the entire system.

Disclosed is an underwater water transfer apparatus deployable within a water body. The apparatus includes a closed receptacle suspended underwater at a first depth, the receptacle adapted to receive ambient water at the first depth therewithin as a result of either the relative movement of the receptacle with respect to the ambient water or vice versa, or both, a tube in fluid communication with the receptacle, and a heat exchanger submerged at a second depth. The heat exchanger extends from an extremity of the tube so as to alter the temperature of the incoming water from the tube, before being released at the second depth, to be closer to that of ambient water at the second depth.

Disclosed is an underwater water transfer apparatus deployable within a water body. The apparatus includes a closed receptacle suspended underwater at a first depth, the receptacle adapted to receive ambient water at the first depth therewithin as a result of either the relative movement of the receptacle with respect to the ambient water or vice versa, or both, a tube in fluid communication with the receptacle, and a heat exchanger submerged at a second depth. The heat exchanger extends from an extremity of the tube so as to alter the temperature of the incoming water from the tube, before being released at the second depth, to be closer to that of ambient water at the second depth.

An energy generation system to generate energy from a fluid flow, the energy generation system including an extendable arm that extends into a fluid flow, a fin connected to one end of the extendable arm and causing, due to the fluid flow, the extendable arm to move from a first orientation within the fluid flow to a second orientation within the fluid flow, and a joint connected to a second end of the extendable arm that couples the extendable arm to an energy generator.

An energy generation system to generate energy from a fluid flow, the energy generation system including an extendable arm that extends into a fluid flow, a fin connected to one end of the extendable arm and causing, due to the fluid flow, the extendable arm to move from a first orientation within the fluid flow to a second orientation within the fluid flow, and a joint connected to a second end of the extendable arm that couples the extendable arm to an energy generator.

A modular, electricity generating apparatus comprises an elongate, central member comprising a first end and a second end; at least one foil disposed about the central member in fluid interacting relation thereto; the solar foil comprising an outer surface having photovoltaic properties; the first end and the second end dimensioned and configured to be connected to a connecting node; and, the elongate central member at least partially formed of an electrically conductive material and configured to conduct electricity from at least one of the connecting nodes to the other of the connecting nodes.