A floating electrical power generator having a three-dimensional (3D) flow passageway configured for increasing the water flow on the paddle wheel to increase the power output.

A combined pump and turbine (electromechanical converter), which may be operable as a motorized centrifugal pump for starting a siphon and as an electromechanical turbine particularly for transmission of a liquid, such as water, in a water treatment plant.

A combined pump and turbine (electromechanical converter), which may be operable as a motorized centrifugal pump for starting a siphon and as an electromechanical turbine particularly for transmission of a liquid, such as water, in a water treatment plant.

The invention provides a system for the extraction of energy from an underwaterflow stream in a body of water. The system comprises a support frame which comprises a plurality of receptacles for mounting functional modules on the support frame. The plurality of receptacles are arranged to form a horizontally-distributed two-dimensional array on the support frame. The plurality of vertical axis turbine units is configured to be interchangeably mounted in the receptacles.

The invention provides a system for the extraction of energy from an underwaterflow stream in a body of water. The system comprises a support frame which comprises a plurality of receptacles for mounting functional modules on the support frame. The plurality of receptacles are arranged to form a horizontally-distributed two-dimensional array on the support frame. The plurality of vertical axis turbine units is configured to be interchangeably mounted in the receptacles.

A hydropower installation includes a water supply and an energy generating station, with the supply at a higher level than the energy generating station; and a duct extending between the supply and the energy generating station. The energy generating station of the hydropower installation is configured based on high water velocity and low pressure. The duct may comprise plastic pipes. The duct may be arranged on a foam support and enclosed by a foam embedment. The duct may comprise at least two duct sections, with an intermediate energy generating station arranged between the duct sections of the duct. The duct may comprise internally extending protrusions, such as dimples to promote a laminar flow of fluid through the pipe. The duct may taper. Water pressure inside the duct may be maintained at atmospheric level. The proposed features all contribute to a pressure free velocity based system.

A hydropower installation includes a water supply and an energy generating station, with the supply at a higher level than the energy generating station; and a duct extending between the supply and the energy generating station. The energy generating station of the hydropower installation is configured based on high water velocity and low pressure. The duct may comprise plastic pipes. The duct may be arranged on a foam support and enclosed by a foam embedment. The duct may comprise at least two duct sections, with an intermediate energy generating station arranged between the duct sections of the duct. The duct may comprise internally extending protrusions, such as dimples to promote a laminar flow of fluid through the pipe. The duct may taper. Water pressure inside the duct may be maintained at atmospheric level. The proposed features all contribute to a pressure free velocity based system.

A method, system and apparatus for operating a hydraulic turbine. A speed adjustment quantity for the hydraulic turbine and a corresponding change in flow quantity are obtained. A rotation speed of the hydraulic turbine is adjusted based on the speed adjustment quantity. A change ratio of the flow quantity with regard to the speed adjustment quantity is determined based on the speed adjustment quantity and the corresponding change in flow quantity. An adjustment manner in which the rotation speed is further adjusted is determined based on the determined based on the determined change ratio of flow quantity. An adjustment manner in which the rotation speed is further adjusted is determined based on the determined change ratio of flow quantity. It enables the hydraulic turbine to track a maximum efficiency operation point under a given power order and water head in real time at a low cost.

A method, system and apparatus for operating a hydraulic turbine. A speed adjustment quantity for the hydraulic turbine and a corresponding change in flow quantity are obtained. A rotation speed of the hydraulic turbine is adjusted based on the speed adjustment quantity. A change ratio of the flow quantity with regard to the speed adjustment quantity is determined based on the speed adjustment quantity and the corresponding change in flow quantity. An adjustment manner in which the rotation speed is further adjusted is determined based on the determined based on the determined change ratio of flow quantity. An adjustment manner in which the rotation speed is further adjusted is determined based on the determined change ratio of flow quantity. It enables the hydraulic turbine to track a maximum efficiency operation point under a given power order and water head in real time at a low cost.

A floating electrical power generator having a three-dimensional (3D) flow passageway configured for increasing the water flow on the paddle wheel to increase the power output.