| 摘要 |
An apparatus and method for generating electricity from a liquid flowing in a generally vertical direction down a borehole. There is a turbine disposed at a subsurface position and having an intake and a discharge, the turbine being mechanically coupled via an output shaft to an electric generator such that rotation of the output shaft drives the generator to produce electric power. A control valve assembly is positioned below the turbine, the control valve assembly including a valve adapted to receive water discharged from the turbine and a control system operatively connected to the valve for throttling the valve in response to the rate of flow of liquid to the turbine to maintain the rotation of the turbine in a predetermined RPM range. |
