A system for generating power from a flow of liquid having at most fifty feet of head and a flow rate of at most 300 cubic feet per second, includes: an axial-flow turbine, a penstock, an intake, a generator, and a control circuit. Each blade of the turbine runner is releasably coupled to the hub and each blade: 1) is configured to extract energy from liquid flowing through the runner by rotating the hub when the flow of liquid contacts the blade, and 2) has a pitch that is adjustable. The length of the penstock is adjustable. The generator is operable to generate electric power from rotation of the turbine. The control circuit to determines changes in the flow of liquid and in response modifies at least one of the following: 1) the speed of the axial-flow turbine's hub, and 2) the flow of liquid that the runner receives.

A method of mounting a guide apparatus of a large hydraulic machine with a vertical axis of rotation and wherein the axes of the guide blades extend vertically as well. The method includes the following steps: assembling an assembly with at least the upper guide wheel ring or the turbine cover and all the guide blades of the guide apparatus. This assembly does not take place in the machine shaft and the guide blades are mounted in a suspended manner, lowering the guide blades to mutually different height levels within the assembly such that the lowered guide blades can be displaced upwardly, installing the lower guide wheel ring in the machine shaft, and installing the assembly in the machine shaft by continuous lowering, wherein the guide blades present in the assembly are successively inserted into the openings provided in the lower guide wheel ring.

A method of mounting a guide apparatus of a large hydraulic machine with a vertical axis of rotation and wherein the axes of the guide blades extend vertically as well. The method includes the following steps: assembling an assembly with at least the upper guide wheel ring or the turbine cover and all the guide blades of the guide apparatus. This assembly does not take place in the machine shaft and the guide blades are mounted in a suspended manner, lowering the guide blades to mutually different height levels within the assembly such that the lowered guide blades can be displaced upwardly, installing the lower guide wheel ring in the machine shaft, and installing the assembly in the machine shaft by continuous lowering, wherein the guide blades present in the assembly are successively inserted into the openings provided in the lower guide wheel ring.

There is disclosed a system and method for streaming of volumetric three-dimensional video content. The system includes a separate rendering server and display device such that the rendering server receives pose and motion data from the mobile device and generates completed frames of video for the mobile device. The frames of video are transmitted to the mobile device for display. Predictive algorithms enable the rendering server to predict display device pose from frame-to-frame to thereby reduce overall latency in communications between the rendering server and display device.

There is disclosed a system and method for streaming of volumetric three-dimensional video content. The system includes a separate rendering server and display device such that the rendering server receives pose and motion data from the mobile device and generates completed frames of video for the mobile device. The frames of video are transmitted to the mobile device for display. Predictive algorithms enable the rendering server to predict display device pose from frame-to-frame to thereby reduce overall latency in communications between the rendering server and display device.

The method allows stabilizing the rotation speed of a hydraulic machine with S-characteristics. It is implemented by means of a control loop feedback system having a controller for calculating an orientation to affect guide vanes of the machine. It includes steps of calculating a set of internal states associated with the operating point of the machine, establishing a linearized transfer function in function of the set of internal states, calculating characteristics parameters of the controller in function of the established transfer function so that the control loop feedback system is stable, measuring the rotation speed of the hydraulic machine, comparing the measured rotation speed with a target rotation speed, and adjusting the orientation affected to the guide vanes so as to reduce the speed difference between the calculated rotation speed and the target rotation speed.

The method allows stabilizing the rotation speed of a hydraulic machine with S-characteristics. It is implemented by means of a control loop feedback system having a controller for calculating an orientation to affect guide vanes of the machine. It includes steps of calculating a set of internal states associated with the operating point of the machine, establishing a linearized transfer function in function of the set of internal states, calculating characteristics parameters of the controller in function of the established transfer function so that the control loop feedback system is stable, measuring the rotation speed of the hydraulic machine, comparing the measured rotation speed with a target rotation speed, and adjusting the orientation affected to the guide vanes so as to reduce the speed difference between the calculated rotation speed and the target rotation speed.

A blade attaching method is provided for a power generating apparatus which may include a blade, a hub having a blade attaching part, a bearing, a generator, and a pitch drive mechanism. The method may include, but is not limited to: a step of attaching a suspension device to the blade; a step of lifting the blade; a step of holding the blade so that the blade attaching part of the hub faces the blade root part of the; a step of rotating the blade attaching part by the pitch drive mechanism to a set angular position while holding the hub; and a step of fixing the blade to the hub after rotating the blade attaching part to the set angular position.

A blade attaching method is provided for a power generating apparatus which may include a blade, a hub having a blade attaching part, a bearing, a generator, and a pitch drive mechanism. The method may include, but is not limited to: a step of attaching a suspension device to the blade; a step of lifting the blade; a step of holding the blade so that the blade attaching part of the hub faces the blade root part of the; a step of rotating the blade attaching part by the pitch drive mechanism to a set angular position while holding the hub; and a step of fixing the blade to the hub after rotating the blade attaching part to the set angular position.

The present invention generally relates to a runner unit of a tidal power plant, and more particular to a device for reversing a blade of the runner unit. The device according to the invention is lighter and more efficient with respect to known solutions which involve articulated mechanisms as it is based on an auxiliary servomotor including a reciprocating linear rack which acts on the blade to be reversed.