A segmented augmented turbine assembly for generating electricity from a fluid in motion, the assembly comprising a segmented annular ducted channel extending between an inlet receiving the fluid and an outlet, the channel comprising a convergent accelerating the fluid, a segmented turbine-rotor section comprising blades and guide vanes rotating about a central shaft coupled to a generator, and a diffuser section configured to decelerate the fluid, wherein the channel comprises solid inserts attached to an outside face of the turbine-rotor section, the flow stream passing through open flow-through segments positioned between the solid inserts.

An electric generating precipitation collection system comprising a collection tank, a plurality of pipes, a plurality of valves, a piston assembly, and an outlet. The system is configured to collect a liquid, direct the liquid through the pipes and valves to pressurize the liquid with the piston assembly, and eject the pressurized liquid at the outlet. The plurality of pipes and valves are arranged relative to the piston assembly so that a piston can pressurize the liquid in the pipe connected to the outlet. The system may further comprise a generator that converts the force of the pressurized liquid from the outlet into electricity. Further, a collection basin may be included in the system to collect liquid after passing through the generator.

The invention concerns an inter-blade profile (14) for a turbine runner blade, said inter-blade profile (14) comprising a profile (16), and a plug (18), forming a basis of the profile (16) and intended for being inserted into a corresponding hole (21) made in a blade.

The present invention relates to an inlet for a hydrodynamic screw, the inlet comprising—a first end connectable to a hydrodynamic screw, the first end having a first opening—a second end for transporting water through the inlet towards the first end, the second end having a second opening, —an inlet body connecting the first end and the second end, the inlet body comprising a hollow that extends through the inlet body and connects the first opening and the second opening, wherein the inlet has a first diameter at the first opening and a second diameter at the second opening, the second diameter being larger than the first diameter, and wherein the nlet further comprises a ridge arranged on an inner surface of the hollow in a helix, the ridge having a height that increases towards the first end. The invention also relates to a hydrodynamic screw.

The present invention relates to an inlet for a hydrodynamic screw, the inlet comprising—a first end connectable to a hydrodynamic screw, the first end having a first opening—a second end for transporting water through the inlet towards the first end, the second end having a second opening, —an inlet body connecting the first end and the second end, the inlet body comprising a hollow that extends through the inlet body and connects the first opening and the second opening, wherein the inlet has a first diameter at the first opening and a second diameter at the second opening, the second diameter being larger than the first diameter, and wherein the nlet further comprises a ridge arranged on an inner surface of the hollow in a helix, the ridge having a height that increases towards the first end. The invention also relates to a hydrodynamic screw.

A method for driving a transmission mechanism output power in response to an anticipated fluid-pressure gradient field is provided. The method includes sensing the change of direction of pressure gradient field at a desired location from the different area of the transmission mechanism within fluid. The method further includes constructing fluid-pressure gradient field based upon isolation-fluid apparatus or low-density fluid space installed on a transmission mechanism within fluid.

A startup method of a Francis turbine according to an embodiment includes: a bypass-valve opening step of opening the bypass valve with the inlet valve closed; an inlet-valve opening step of opening the inlet valve after the bypass-valve opening step; and a first rotation-speed increasing step of increasing a rotation speed of the runner by opening the guide vane at an opening that is 50% or more of a maximum opening before a flow velocity of a swirling flow flowing around the runner reaches 90 m/sec.

This disclosure includes subsea pumping apparatuses and related methods. Some apparatuses include one or more subsea pumps, each having an inlet and an outlet, and one or more motors, each configured to actuate at least one pump to communicate a hydraulic fluid from the inlet to the outlet, where the subsea pumping apparatus is configured to be in fluid communication with a hydraulically actuated device of a blowout preventer. Some subsea pumping apparatuses include one or more of: a desalination system configured to produce at least a portion of the hydraulic fluid; one or more valves, each configured to selectively route hydraulic fluid from an outlet of a pump to, for example, a subsea environment, a reservoir, and/or the inlet of the pump; and a reservoir configured to store at least a portion of the hydraulic fluid. Some apparatuses are configured to be directly coupled to the hydraulically actuated device.

An electric generating precipitation collection system comprising a collection tank, a plurality of pipes, a plurality of valves, a piston assembly, and an outlet. The system is configured to collect a liquid, direct the liquid through the pipes and valves to pressurize the liquid with the piston assembly, and eject the pressurized liquid at the outlet. The plurality of pipes and valves are arranged relative to the piston assembly so that a piston can pressurize the liquid in the pipe connected to the outlet. The system may further comprise a generator that converts the force of the pressurized liquid from the outlet into electricity. Further, a collection basin may be included in the system to collect liquid after passing through the generator.

An electromagnetic turbine system includes a circulation system for recirculating fluid that drives turbine impellers for electromagnetic turbine modules. The circulation system includes a fluid separator module which separates gas from liquid and circulates the liquid back to a pressure chamber. The liquid in the pressure chamber is propel by compressed gas. Multiple pressure chambers may be controlled to release pressurized fluid to drive their respective shafts on a staggered timing sequence. The turbine modules may be levitated from a supporting surface to reduce friction.