A water-driven turbine has an elongated endless conveyor with down and up streaming straightaways connected by travel-reversing turns. Paddles mounted on the conveyor present high resistance to waterflow on the downstream straightaway and low resistance to waterflow or the atmosphere on the upstream straightaway, the differential allowing the flow of water to continuously drive the conveyor which is connected to a power take-off shaft facilitating connection to a variety of energy-harnessing systems. The turbine can be towed, self-driven or mooring line manipulated to a flow site and is operable in unidirectional flows such as rivers and reversing flows such as tides at depths from surface to bottom. The paddles can be mounted or changed on shore, at the flow site and anywhere in between. The turbine is efficient in low and high velocity water flow, not easily damaged by floating debris, cavitation free and fish, mammal and environmentally friendly.

An example valve includes: a plurality of ports comprising: a first port, a second port, and a third port; a spool configured to block fluid flow from the first port to the third port while allowing fluid flow from the third port to the second port when the valve is in an unactuated state; a spring applying a biasing force on the spool in a proximal direction, wherein when the valve is actuated, the spool moves in a distal direction against the spring, thereby allowing fluid flow from the first port to the third port while blocking fluid flow from the third port to the second port; and a turbine configured to rotate as fluid flows from the first port to the third port when the valve is in an actuated state.

A generator device for generating electrical current on the basis of a magnetic interaction between a rotating permanent magnet and rotatable further permanent magnets.

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.

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.

Provided is a vertical axis wind power generation device including a wind turbine of a vertical axis type including a support column, a main shaft disposed on an upper portion of the support column so as to be rotatable, a plurality of blades coupled to the main shaft through arms; a power generator; and a container having a standard dimension for freight transport. The wind turbine is accommodatable in a folded or disassembled state in the container together with the power generator. The container is provided with a support-column fixing part configured to fix the support column of the wind turbine to the container. The container may include an inclining mount inside the container, the inclining mount being configured to accommodate a folded body of the wind turbine.

A system that produces electricity offshore through a fixed installation, including a minimum of; one turbine, one generator, one compressor set, one high voltage subsea cable, and one control center; the generator is a gas driven generator that produces enough power to operate the electric motors, an onshore control center that operate and monitor the system, and all electricity generated through the water turbines and generators are transported to the onshore electricity grid through a high voltage subsea cable.

A marine current turbine rotor comprises a hub and fixed and two or more pitchable blade sections configured to reduce bending moment loads on the pitch bearings and enable the use of non-standard, low-cost structural materials for the hub, blades, and pitch shaft. A submersible pitch drive mechanism or linkage in the hub rotates the pitch shaft to cause the pitchable blade section to move to a specified pitch position. The hub cavity is configured to be “wet” without the expense and maintenance requirement of seals to prevent water intrusion, utilizing water-lubricated pitch bearings.

A water-driven turbine has an elongated endless conveyor with down and up streaming straightaways connected by travel-reversing turns. Paddles mounted on the conveyor present high resistance to waterflow on the downstream straightaway and low resistance to waterflow or the atmosphere on the upstream straightaway, the differential allowing the flow of water to continuously drive the conveyor which is connected to a power take-off shaft facilitating connection to a variety of energy-harnessing systems. The turbine can be towed, self-driven or mooring line manipulated to a flow site and is operable in unidirectional flows such as rivers and reversing flows such as tides at depths from surface to bottom. The paddles can be mounted or changed on shore, at the flow site and anywhere in between. The turbine is efficient in low and high velocity water flow, not easily damaged by floating debris, cavitation free and fish, mammal and environmentally friendly.

The multi-staged cowl described herein allows to increase and maximize water mass flow and pressure drop at the runner cross-section of a hydrokinetic turbine so as to maximize produced power output, while respecting dimensional constraints provided by a shallow body of water, a river for example, in which the hydrokinetic turbine can be submerged. The multi-staged cowl described herein can thus be configured so as to allow water to flow through the hydrokinetic turbine at a substantially stable water mass flow, eliminating instability, avoiding vortices, minimizing cavitation and avoiding fluid separation to negligible levels, and can include an inlet, an outlet and multiple stages which can extend between the inlet and the outlet, so that water can flow therethrough in a water flow direction.