A downhole turbine may include a stator disposed in a turbine housing, a rotor disposed between the stator and the turbine housing and wherein the rotor includes an outer housing, a gap that separates the stator and the rotor, wherein the gap is oil filled, and one or more blades disposed on the outer housing between the turbine housing and the rotor. The downhole turbine may further include a compressible medium attached to the outer housing between the stator and the outer housing, wherein the compressible medium is separated from the stator by the gap, and one or more magnets attached to an inner surface of the compressible medium, wherein the one or more magnets are separated from the stator by the gap.

An energy conversion device for converting water energy, in some cases water energy from waves and/or a flow such as an ocean current, into electric energy, comprises at least one rotor having a rotor rotational axis, the alignment of which is in some cases fixed by a supporting frame, and a flow housing which comprises a rotor shell which surrounds the rotor radially to the rotor rotational axis.

A hydroelectric apparatus includes multiple propellers to be driven by a hydraulic current, a generating module and a transmission arranged between the propellors and the generating module. Thus, the rotation of the propellors is convertible into electricity. The transmission is used to change a rotational speed of the set of propellers. The propellors are able to float on water in a canal without affecting the performance of the canal. The number of the propellors is large to produce a large torque to increase the power of the hydroelectric apparatus so that the electricity can be supplied to the public. Moreover, the small size of the hydroelectric apparatus renders the hydroelectric apparatus inexpensive and environmentally friendly.

A power generation system anchored to a hydraulic arm, capable of pivoting up or down to optimize power generation based upon the present conditions of the flowing body of water. The turbines are augmented by diffusers to improve fluid flow and power generation. The overall design is easily built, installed, and maintained, providing easy power to homes without a need to connect to a public grid, and safety measures are affixed to prevent undesired items from entering the turbine propellers.

The present invention relates to a power generation apparatus and, more specifically, to a freely-controlled power generation apparatus configured so as to generate electric power while being freely controlled under optimal conditions, since a cylinder body for supporting screws submerged under water is elevated by buoyancy or rotated according to the flow of the water.

This invention provides a modularized ocean energy generating device and a built-in module thereof. The built-in module includes an inner frame, at least one hydraulic generator module, at least one mounting shaft, at least one driving unit, and at least two barriers. The modularized ocean energy generating device includes an outer frame, and the inner frame is detachably disposed in the outer frame. The hydraulic generator module is disposed in the inner frame and is mounted at the at least one mounting shaft, and the at least one mounting shaft is rotatably mounted at the inner frame. The driving unit is connected to the mounting shaft to drive the mounting shaft to rotate. The barriers are disposed at the inner frame or the outer frame and located at upstream and downstream sides of the hydraulic generator module along a water flow direction, respectively.

A water power plant for the generation of electric current from a flowing medium by means of a turbine, which includes a housing around which the flow passes on an outer side, a stator of an electric generator which operates in a low-speed mode, and a rotor of the generator, which is rotatably mounted relative to the stator. The rotor includes a rotor ring with an annular surface and, starting from the rotor ring, an arrangement of inwardly extending turbine blades, thereby defining a free-standing axis of rotation. The housing defines an inlet portion with a first front-side cutting edge which delimits a circular inlet opening, from which extends an inlet-side guide surface to the rotor, and an outlet portion with an outlet opening, between which a flow path passing the rotor ring can be formed. It is provided that the inlet opening has a free inlet cross-section which is maximally as large as a cross-sectional area delimited by the rotor ring.

Methods, systems and apparatuses including systems and methods that can be used for operating a hydrokinetic turbine such as along one or more flow channels of a river for power generation is disclosed. The hydrokinetic turbine can be positioned within the one or more flow channels or can be shaped to form one or more flows and can be turned by the flow of the river.

A marine plant assembly comprising a floating vessel and a plant operating unit attached to a buoyancy vessel in such a way that the operating unit is at least partially submerged during operation. At least one link element provides a hinged connection between the operating unit and the buoyancy vessel, thereby to allow movement of the operating unit from its submerged operating position to above the water level and adjacent the buoyancy vessel by said link element rotating into a position substantially parallel to the buoyancy vessel.

The helicoid in a tube is an energy conversion device. The helicoid in a tube converts energy in a manner selected from the group consisting of: a) converting the inertia of the mass of the flow of a fluid through the helicoid in a tube into rotational energy; b) converting a rotational energy into a change in the inertia of the mass of the flow of the fluid through the helicoid in a tube; and, c) converting the inertia of the mass of the flow of a fluid through the helicoid in a tube into fluid turbulence, cavitation, and heat in the form of friction. The helicoid in a tube incorporates a turbine stator and a turbine rotor. The turbine rotor installs in the turbine stator.