Gas turbine system with variable guide vane and optimized reliable sealing air operation
Publication Date: 2008-Mar-31
The IP.com Prior Art Database
For an optimized sealing air operation in a gas turbine with variable guide vane operation, the gas turbine system comprises a minimum flow orifice and a pressure regulator, optionally a heat exchanger. The minimum flow orifice and the pressure regulator are arranged in parallel ensuring a guaranteed minimum flow. An orifice within the piping system adjusts the distribution of sealing air to rotor bearing seals. Extracted compressor air may additionally be cooled by the heat exchanger. The system ensures a minimum sealing airflow and prevents unnecessary efficiency reduction of the gas turbine.