The hydro turbine of the invention consists of a housing, which represents a stator part of hydro turbine, or a stator (S), and a rotor (R) that is assembled on the stator (S) through its axis so as to enable its rotation. The rotor (R) is designed as an axially symmetric body with flat lateral surfaces with a circular cross-section. The circular cross-section from both outer ends, that is from both flat lateral surfaces with a circular cross-section, decreases equally and continuously towards the middle, so that the rotor (R) has a narrowest cross-section in the middle. The decrease of the circular cross-section from both outer ends of the rotor (R) towards the central part of the rotor (R) is carried out such that the shape of the rotor (R) body in the longitudinal cross-section, that is, along the axis of the rotor (R), follows the shape of a parabolic curve or a sinusoidal curve. The rotor (R) has over its entire surface, in the longitudinal direction, that is along its axis, curved grooves (U). This kind of design of the hydro turbine enables that the water flows through the grooves (U) towards the middle part of the rotor (R), where it flows out and transfers all the momentum to the rotor (R), so that the hydro turbine can generate the torque (MR) even with small and variable flows.

The hydro turbine of the invention consists of a housing, which represents a stator part of hydro turbine, or a stator (S), and a rotor (R) that is assembled on the stator (S) through its axis so as to enable its rotation. The rotor (R) is designed as an axially symmetric body with flat lateral surfaces with a circular cross-section. The circular cross-section from both outer ends, that is from both flat lateral surfaces with a circular cross-section, decreases equally and continuously towards the middle, so that the rotor (R) has a narrowest cross-section in the middle. The decrease of the circular cross-section from both outer ends of the rotor (R) towards the central part of the rotor (R) is carried out such that the shape of the rotor (R) body in the longitudinal cross-section, that is, along the axis of the rotor (R), follows the shape of a parabolic curve or a sinusoidal curve. The rotor (R) has over its entire surface, in the longitudinal direction, that is along its axis, curved grooves (U). This kind of design of the hydro turbine enables that the water flows through the grooves (U) towards the middle part of the rotor (R), where it flows out and transfers all the momentum to the rotor (R), so that the hydro turbine can generate the torque (MR) even with small and variable flows.

A hydroelectric power generation apparatus includes a braking force generation unit configured to apply a braking force to rotation of a hydraulic turbine, and a controller configured to control the braking force generation unit to repeat increasing and decreasing the braking force to vary a rotational speed of the hydraulic turbine. Varying the rotational speed of the hydraulic turbine helps to flow away debris and the like adhering to hydraulic turbine blades. Preferably, the braking force generation unit includes an electrical, mechanical or fluid type braking device configured to apply a braking force to a rotary shaft of the hydraulic turbine. Preferably, the braking force generation unit includes a power generator configured to generate power through rotation of the hydraulic turbine, and the controller increases/decreases the braking force by varying power extracted from the power generator.

A flywheel energy storage device containing at least one rotary element (1) which is capable of floating and rotating on liquid and/or in liquid, at least one element which is capable of transferring energy onto the rotary element (1) and at least one generator (3) which is capable of transferring the energy from the rotary element (1) wherein the rotary element (1) is axleless. A method of use of the flywheel energy storage device in such manner that the energy is accumulated as kinetic energy of at least one rotary element (1) that floats and rotates on liquid or in liquid.

A turbine assembly for installation inside a pipe section in which a fluid flows. The turbine assembly includes a shaft and one or more blades. The shaft is couplable to a generator and has a portion positionable inside the pipe section. The blade(s) is/are attached to the portion of the shaft. The blade(s) is/are pushed upon by the fluid as the fluid flows within the pipe section causing the one or more blades to rotate the shaft. The shaft is operable to cause the generator to generate electricity as the shaft is rotated by the blade(s). A pressure of the fluid is reduced as the fluid pushes on the blade(s) and causes the blade(s) to rotate the shaft.

A floating drum turbine is used for generating the electrical energy from the kinetic energy of a water stream (sea wave or river flow) that provides the mechanical energy needed to rotate an electrical generator for generating the electricity. The drum turbine is installed on a buoyant skid anchored to the seabed by some chains/ropes to keep it in a fixed position and direction along the water stream. The turbine is coupled to an electrical generator with a power transmission system, and generates the electricity that is transferred to the coast using a cable system floated on the water surface.

A power generation and/or storage apparatus comprising a buoyant flywheel, wherein the flywheel is arranged, in use, in contact with a body of liquid for rotation about a substantially vertical axis, an underside of the flywheel comprising a circumferentially extending opening, wherein, in use, gas is trapped within the opening by the surface of the liquid to define an gas cushion for supporting the flywheel.

A system, method, and apparatus for generating hydroelectric power from subsurface wells penetrating or terminating in fluid-bearing, subterranean zones or intervals containing gas, oil, water, or any combination of these fluids. The system involves methods and apparatus summarized in a five-step process that includes: Phase 1Fluid Production, Phase 2Fluid Gathering and Combination, Phase 3Hydropower Electricity Generation, Phase 4Fluid Processing, and Phase 5Fluid Pumping, Distribution, and Injection.

The utilization of hydro-generation technology is provisioned inside of water distribution systems within large urban buildings that require water pressure reduction. These micro-hydro-generators reduce the water pressure for tenant use and converts the energy into electricity to be used or sold.

A hydrokinetic turbine system for harvesting energy from riverine and tidal sources, including a first floating dock, a marine hydrokinetic turbine mounted on the first floating dock, and a second floating dock. The system further includes a winch assembly mounted on the second floating dock and operationally connected to the first floating dock and a linkage assembly operationally connected to the first floating dock and to the second floating dock. The linkage assembly may be actuated to pull the first floating dock into contact with the second floating dock. The linkage assembly may be actuated to distance the first floating dock from the second floating dock, and the winch assembly may be energized to orient the first floating dock into a position wherein the marine hydrokinetic turbine is above the first floating dock and wherein the winch assembly may be energized to orient the first floating dock into a position wherein the marine hydrokinetic turbine is below the first floating dock.