Abstract: The invention concerns a Wells turbine, comprising a hub with a plurality of rotor blades having a drop-shaped profile orienting from a profile nose; the rotor blades are attached to the hub in a rotary fashion by means of a foot part such that the rotor blade angle is variable with respect to the plane of rotation, wherein the associated rotational axis intersects the chord for each profile section in a threading point, which is located in a region between the profile nose and the aerodynamic center of the profile; the adjustment of the blade angle is made passively by the equilibrium occurring during the operation of the wells turbine between the aerodynamic torque, acting on the rotor blades, and the centrifugal torque, wherein the average density of the rotor blade is selected to be less than 2700 kg/m3 and/or the mass distribution within the profile is selected such that the surface centrifugal torque of the rotor blade is reduced relative to a profile made from a solid and/or the surface centrifugal to

Abstract: The invention relates to a flow power plant, comprising a water turbine having torsionally rigid rotor blades, a drive train connected to the water turbine, which at least indirectly drives an electric generator and is characterized in that at inflow speeds v for which the flow power plant is designed, the water turbine is configured to be non-auto-restarting for tip speed ratios ? below a predetermined auto-restart tip speed ratio ?s where ?s?1.

Abstract: A power plant for obtaining energy from a flow of a body of water with a varying main incident flow direction, comprising a rotating unit with an axial turbine assigned an axis of rotation and comprises at least one rotor blade, the rotor blade is fastened in a rotationally conjoint manner to a rotor head of the rotating unit, and the rotor blade has at least over a partial region of the longitudinal extent thereof, a profile which can be impinged on by flow bidirectionally for windward and leeward operation. A rotary device is provided for a power plant component for adjusting a relative angle between the axis of rotation and the main flow direction, wherein the rotary device is assigned a first stop and a second stop which limit the range of movement of the rotary device to a range of angle of rotation of less than 180°.

Abstract: The invention relates to a flow power plant, comprising a water turbine having torsionally rigid rotor blades, a drive train connected to the water turbine, which at least indirectly drives an electric generator and is characterized in that at inflow speeds v for which the flow power plant is designed, the water turbine is configured to be non-auto-restarting for tip speed ratios ? below a predetermined auto-restart tip speed ratio ?s where ?s?1.

Abstract: The invention relates to a lifting device for placing and/or lifting a turbine-generator unit of an underwater power plant onto or off of a support structure, comprising a submersible component having a transverse centering device and a gripping device; the transverse centering device causing lateral centering of the submersible component relative to the turbine-generator unit by a support on the support structure; and the gripping device comprising a movable clamping element for the detachable securing of the turbine-generator unit.

Abstract: The invention concerns a Wells turbine, comprising a hub with a plurality of rotor blades having a drop-shaped profile orienting from a profile nose; the rotor blades are attached to the hub in a rotary fashion by means of a foot part such that the rotor blade angle is variable with respect to the plane of rotation, wherein the associated rotational axis intersects the chord for each profile section in a threading point, which is located in a region between the profile nose and the aerodynamic center of the profile; the adjustment of the blade angle is made passively by the equilibrium occurring during the operation of the wells turbine between the aerodynamic torque, acting on the rotor blades, and the centrifugal torque, wherein the average density of the rotor blade is selected to be less than 2700 kg/m3 and/or the mass distribution within the profile is selected such that the surface centrifugal torque of the rotor blade is reduced relative to a profile made from a solid and/or the surface centrifugal tor