Abstract: A runner for a hydraulic turbine or pump has a plurality of blades. Each of the blades is defined by a pressure surface, an oppositely facing suction surface, a leading edge and a spaced-apart trailing edge. At least one of the blades has a device for supplying a flow of oxygen containing gas to the trailing edge of the same blade. The device includes at least two separate gas inlet apertures and at least two separate gas passages, each extending from one of the separate gas inlet apertures to a separate group of orifices in the trailing edge of the same blade. Each of the separate group of orifices has at least one orifice to admit gas out of the corresponding separate gas passage to the passing fluid during the operation of the runner.

Abstract: A runner for a hydraulic turbine or pump has a plurality of blades. Each of the blades is defined by a pressure surface, an oppositely facing suction surface, a leading edge and a spaced-apart trailing edge. At least one of the blades has a device for supplying a flow of oxygen containing gas to the trailing edge of the same blade. The device includes at least two separate gas inlet apertures and at least two separate gas passages, each extending from one of the separate gas inlet apertures to a separate group of orifices in the trailing edge of the same blade. Each of the separate group of orifices has at least one orifice to admit gas out of the corresponding separate gas passage to the passing fluid during the operation of the runner.

Abstract: There is provided a method of operating a pump turbine plant including a turbine with a turbine impeller and a turbine spiral casing having a first pressure pipe, and a pump with a pump impeller and a pump spiral casing having a second pressure pipe; an electrical machine dynamically in a drive connection with a shaft, the pump turbine plant further including a hydraulic short-circuit that can be created between the turbine and the pump, wherein the turbine has a greater rated power than the pump, and wherein the turbine and the pump operate under partial load at least temporarily in the hydraulic short-circuit. The method further includes operating the turbine or the pump in the hydraulic short-circuit when a degree of efficiency of the pump and of the turbine in the hydraulic short-circuit is greater than a degree of efficiency of the turbine on its own.

Abstract: The invention relates to a line system for a water power plant, comprising the following features and components: a turbine having a turbine impeller and a turbine spiral housing, a pump having a pump impeller and a pump spiral housing, the two spiral housings being arranged to run in opposite directions to one another, a shaft on which the turbine impeller and the pumpkin impeller are arranged in a rotationally fixed manner, an electric machine that has a drive connection to the shaft or can connected thereto, the pressure lines of the two spiral housings opening in a common line pressure line, a turbine pressure line for introducing water out of the main pressure line into a pump turbine in turbine operation, a pump pressure line configured as a bend for introducing water out of the pump turbine into the main pressure line in pump operation or back through the turbine pressure line to the pump turbine in a hydraulic short circuit, and a branch part to which the main pressure line, the turbine pressure line

Abstract: The invention relates to a hydropower plant having a flow pathway, which has an upper water level and a lower water level; having two turbines, which are connected in series in the flow pathway, each comprising a rotor, a housing, and a draft tube. The invention is characterized by the following features: the first machine viewed in the flow direction is a radial or semi-axial or axial flow turbine; the second machine viewed in the flow direction is a radial, semi-axial, or axial flow turbine.

Abstract: The invention relates to a method for primary adjustment of a hydroelectric power plant comprising a dual adjustment turbine, at least one first actuator, and at least one second actuator, wherein the first and second actuators are reset depending upon an actual value of a network frequency of an electrical network which receives the generated electrical power for influencing the turbine output in order to achieve a target value of the network frequency. The invention is characterised in that the first actuators are only operated in predefined actuating steps, and then an adjustment to the target value of the network frequency is performed by resetting the second actuators.

Abstract: The invention concerns a pump turbine plant, comprising a turbine with a turbine impeller as well as a turbine spiral housing; a pump with a pump impeller as well as a pump spiral housing; an electrical machine, which is in a drive connection with the shaft or can be brought into said connection; a hydraulic short-circuit can be created between turbine and pump. The invention is characterised by the following features: the turbine has a higher rated power than the pump.

Abstract: The invention relates to a water turbine or water pump or other hydraulic machine that comprises a stationary and a revolving component. The invention also comprises a sealing gap that is disposed between the stationary and revolving components, which is sealed by a labyrinth seal and through which a leakage flow for cooling or lubricating the seal will flow during operation of the hydraulic machine. The invention also provides a connection on the sealing gap for its evacuation.

Abstract: The invention relates to a pump turbine system, comprising a turbine with a turbine impeller as well as a turbine spiral housing and a turbine suction pipe; a pump with a pump impeller as well as a pump spiral housing and a pump suction pipe; the two spiral housings are arranged to run in opposite directions; a shaft on which the turbine impeller and the pump impeller are non-rotatably arranged; an electrical machine that is in drive communication with the shaft or can be brought into such communication; the pressure lines of the two spiral housings open into a common pressure line; both suction pipes are each connected to suction lines, with both suction lines opening into a common suction line; with a separate shut-off element each being arranged in the suction lines.

Abstract: The invention relates to a pump turbine system comprising a turbine with a turbine impeller as well as a turbine spiral housing; and a pump with a pump impeller as well as a pump spiral housing; an electrical machine which is in drive communication with the shaft or can be brought into such communication; a hydraulic short circuit can be produced between turbine and pump.

Abstract: The invention relates to a hydropower plant having a flow pathway, which has an upper water level and a lower water level; having two turbines, which are connected in series in the flow pathway, each comprising a rotor, a housing, and a draft tube. The invention is characterized by the following features: the first machine viewed in the flow direction is a radial or semi-axial or axial flow turbine; the second machine viewed in the flow direction is a radial, semi-axial, or axial flow turbine.

Abstract: A device for coating substrates with a capillary slot includes a component having a capillary slot with an outlet opening. A container filled with a coating fluid is provided. The component is positioned in the container such that the capillary slot communicates with the coating fluid and such that the coating fluid is supplied to the capillary slot. A device for moving vertically the outlet opening of the capillary slot relative to the container is also provided.