A power generation system includes a flotation assembly configured to float in water and a first harnessing assembly coupled to the flotation assembly and disposed in an airflow above the water. The first harnessing assembly is configured to harness the airflow to create a first rotational energy. The system also includes a second harnessing assembly coupled to the flotation assembly and disposed in the water. The second rotational assembly is configured to harness movement of the water to create a second rotational energy. The flotation assembly also includes a generating module to convert the first and second rotational energies into electrical energy.

A turbine apparatus (10) for deployment in a waterway, comprises a rotor support system (12), a rotor mechanism (14) and a power take-off device (16). The rotor support system (12) is operable to support and align the rotor mechanism (14) with a direction of flow of flowing water in the waterway. Deployment of the turbine apparatus (10) in flowing water generates power. The rotor support system (12) includes an elongated shaft (13), which includes a buoyancy adjusting component (17); a flexible coupling (15) at a first end; and the rotor mechanism (14) being attachable to a second free end of the elongated shaft (13). The flexible coupling (15) facilitates connection of the first end of the elongated shaft to a support structure and facilitates a substantially freely yawing connection of the axial flow turbine apparatus to a support structure located in the waterway in which the turbine apparatus is deployed. The flexible coupling (15) also controls pitching motion of the turbine apparatus (10) relative to the support structure; and in use, permits a predetermined range of yawing motion of the turbine apparatus relative to the support structure; and responds to changes in flow of the flowing water, to maintain the turbine apparatus (10) with a compliant attitude, thereby maintaining alignment of the axis of the elongated shaft and the rotor mechanism with the direction of flow. The buoyancy adjusting component (17) being operable to maintain the deployed turbine apparatus with substantially neutral buoyancy relative to the waterway in which the turbine apparatus is deployed.

An impeller manufacturing method includes: integrally forming an impeller by an additive manufacturing method using a metal powder, the impeller including a disk which has a disk shape about an axis, a plurality of blades which are formed on a surface facing a first side in an axial direction of the disk with gaps therebetween in a circumferential direction about the axis, and a cover which covers the plurality of blades from the first side in the axial direction; processing the integrally formed impeller by a hot isostatic pressing; and causing a polishing fluid containing abrasive grains to flow through a flow path formed between the disk, the cover, and the blades in the impeller after the processing with the hot isostatic pressing and while pressurizing the polishing fluid to perform fluid polishing.

This invention aims to provide the composition of inlet so that the strong output may be provided by rotating with the state of high efficiency as the water falling energy and the flow pressure are simultaneously provided to the impeller and to provide impeller assembly for hydroelectric power generation device maximizing the output efficiency by improving the composition of impeller positively. Namely, this invention inserts the impeller in the main body of cylinder shape that the closed inner space is formed by the cover member, the driving shaft shall be supported in the bearing coupled to the cover member, the impeller installed in the inner space shall be driven by forming the inlet and the outlet in the main body in the impeller assembly for a hydroelectric power generation device; the abovementioned inlet, the fluid like the involute curve shall be supplied from the 12 o'clock direction to the 4 o'clock direction of the main body, the outlet is formed from 6 o'clock direction to 8 o'clock direction, the abovementioned impeller forms the plural fluid tanks opened toward the inner surface of the main body, the moment of rotation of the impeller shall be increased by forming the abovementioned fluid tank in the closed pressuring part is formed in the direction of 4 o'clock direction to 6 o'clock direction.

The invention relates to an outer turbine system (OTS) comprising an outer envelope having first and second ends with an axial inflow and a radial and/or axial outflow of a working gas or liquid. Inner turbine blades are disposed at an inner side of the envelope to rotate the turbine. The envelope and the blades can have a defined shape. The blades can be detachably attachable, adjustable, comprise hollow spaces. The envelope can comprise (adjustable) through openings. The turbine can be mounted in a housing, can include a defined feed casing and one or more stages. The turbine can be supported at defined portions, can be variably mounted, can work bidirectionally, can use regenerative power, can pump and can be fabricated from a defined material. The blades can be provided with a defined cooling system. The turbine can be coupled with another turbine, a mechanocomponent and/or an electrocomponent.

The invention relates to an outer turbine system (OTS) comprising an outer envelope having first and second ends with an axial inflow and a radial and/or axial outflow of a working gas or liquid. Inner turbine blades are disposed at an inner side of the envelope to rotate the turbine. The envelope and the blades can have a defined shape. The blades can be detachably attachable, adjustable, comprise hollow spaces. The envelope can comprise (adjustable) through openings. The turbine can be mounted in a housing, can include a defined feed casing and one or more stages. The turbine can be supported at defined portions, can be variably mounted, can work bidirectionally, can use regenerative power, can pump and can be fabricated from a defined material. The blades can be provided with a defined cooling system. The turbine can be coupled with another turbine, a mechanocomponent and/or an electrocomponent.

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.

The invention concerns a hydraulic turbine comprising a runner crown or a hub (1), possibly a band (2), and blades (3) fixed to said crown or hub, or between said band and said crown, and to be actuated in rotation around an axis of rotation, each blade comprising: a leading edge (8) and a trailing edge (10), at least one local extension (20) having a first contact surface fixed to the trailing edge of the blade (2), a second contact surface fixed to either said band (6) or said crown (4) and two lateral sides (24.sub.1, 24.sub.2) joining at a ridge line (22).

A power generation system includes a flotation assembly configured to float in water and a first harnessing assembly coupled to the flotation assembly and disposed in an airflow above the water. The first harnessing assembly is configured to harness the airflow to create a first rotational energy. The system also includes a second harnessing assembly coupled to the flotation assembly and disposed in the water. The second rotational assembly is configured to harness movement of the water to create a second rotational energy. The flotation assembly also includes a generating module to convert the first and second rotational energies into electrical energy.

A method for obtaining fluid gravitational potential energy and buoyant potential energy by utilizing an internal space of a rotor on turbine engine is provided. The method includes allowing fluid to act on the outer space of the rotor to form a reciprocating power with the interior of the rotor through utilizing a spatial structure of the rotor. The method further includes the rotor on the turbine obtaining a rotational torque of the turbine engine in response to fluid transient action at the desired location.