Shaft power plant

A shaft power plant module for generating electricity by energy conversion of a discharge between a headwater and a tailwater, comprising:

• a vertical shaft module having a shaft top that forms an inflow plane which is parallel to a bed and is configured to extend below a water level of the headwater, wherein the shaft module is open at the top and is closed by a base at its bottom end,
• a unit module having a turbine and an electrical machine, wherein the unit module is configured to be arranged entirely under water in the shaft module and wherein the turbine is configured to be arranged for water to pass through vertically, and
• an outflow module, which is connected to the turbine, that represents a closed flow channel and is configured to lead through a through-passage in the shaft module to the tailwater,
• wherein the shaft power plant module is configured to be attached to a damming structure between the headwater and the tailwater, and
• further wherein, in a horizontal plane of a turbine runner of the turbine, a first cross-sectional area of the shaft module is larger than a second cross-sectional area taken up by the turbine runner,
• further wherein at last one flap that is permanently overflowed is arranged on at least one of the damming structure and a side wall of the vertical shaft.

A shaft power plant for generating electricity by energy conversion of a discharge between a headwater and a tailwater, comprising:

• a vertical shaft, a top of which forms an inflow plane which is parallel to a bed and extends below a water level of the headwater, wherein the shaft is open at the top and is closed by a base at its bottom end,
• a unit having a turbine and an electrical machine, wherein the unit is arranged entirely under water in the shaft and wherein the turbine is arranged for water to pass through vertically,
• an outflow, which is connected to the turbine, that represents a closed flow channel and leads through a through-passage in the shaft to the tailwater, and
• a damming structure between the headwater and the tailwater,
• wherein, in a horizontal plane of a turbine runner of the turbine, a first cross-sectional area of the shaft is larger than a second cross-sectional area taken up by the turbine runner,
• further wherein at least one flap that is permanently overflowed is arranged on a side wall of the shaft.