Patent ID: 8847418
Filing Date: 2014-09-30
Classification: F03B,F05B,Y02E

Abstract:
1. A flow power plant comprising a water turbine having torsionally rigid rotor blades; a drive train connected to the water turbine, wherein the drive train at least indirectly drives an electric generator; wherein at inflow speeds, the water turbine is configured to be non-auto-restarting for tip speed ratios λ below a predetermined auto-restart tip speed ratio λs where λs≧1, wherein λ is defined as a ratio of a circulation speed relative to an inflow speed; wherein the water turbine has a negative power coefficient up to a zero-crossing tip speed ratio λ wherein the rotor blades of the water turbine each comprises a first radial section and a second radial section, wherein a profile and installation angle behaviour for the first radial section is adapted to tip speed ratios λ below the auto-restart tip speed ratio λs and for the second radial section is adapted to tip speed ratios λ above the auto-restart tip speed ratio λs.