Patent ID: 6242819
Filing Date: 2001-06-05
Classification: F01D,F02C,F17D,Y02E,Y02T

Abstract:
An arrangement of a gas decompression turbine in a gas supply piping system, said piping system including a pipe section consisting of a single gas supply pipe, a radial separation wall extending across said single gas supply pipe, a gas decompression turbine and an asynchronous motor/generator unit disposed in said single gas supply pipe, said asynchronous motor/generator unit having a shaft with a lightweight impeller wheel disposed in said single gas supply pipe, a separation wall disposed within said pipe section upstream of, and adjacent to, said gas decompression turbine, said separation wall including at least one nozzle for decompressing the gas and directing the gas being decompressed onto said impeller wheel for driving said asynchronous motor/generator unit, means for conducting away electrical energy produced during generator operation of said motor/generator unit and feeding it into an energy supply network, a safety valve arranged upstream of said asynchronous motor/generator unit for controlling the gas flow to said pipe section, and a control unit connected to said asynchronous motor/generator unit for controlling said valve so as to limit the gas supply to said pipe section when said asynchronous motor/generator shaft exceeds a critical speed value.