GE Gas Turbine manual Auxiliaries, Mechanical Drive Two Shaft Version

Mechanical Drive — Two Shaft Version.

The GE10-2 is the two shaft version of the GE10 intended for mechanical drive applications. The turbine consists of four reaction stages. The first two stages or High Pressure Turbine which are used to drive the axial compressor are common with the GE10-1 model. The low pressure shaft is a double stage, high-energy turbine with variable first stage nozzles which provide maximum flexibility for mechanical drive applications. These third and forth stages which make up the Low Pressure Turbine are coupled to the power shaft driving the load. They are cooled by air bled from the axial compressor.

COMBUSTOR

The combustion system consists of a single, slot-cooled combustion chamber assembly that permits quick and easy maintenance of the hot gas path. This combustion chamber is able to burn a wide range of fuels including liquid distillates, residuals and all gaseous fuels including low BTU gas with system modifications.

The GE10 combustion system is available in both conventional and DLE configurations. The DLE (dry low emissions) system is a simple, field-proven design that guarantees operation at 25 ppmv NOx (burning Natural Gas). The GE10 can also utilize steam and water injection for NOx reduction and power augmentation. Further reduction of emission levels is a constant objective of our continuing combustion development and test programs.

AUXILIARIES

The integrated lubrication system (including oil tank) that feeds the gas turbine, the speed reduction gear and the electric generator is located on the turbine base plate. The main lube oil pump is mechanically driven by the gearbox. An AC electric motor-driven pump guarantees lubrication during normal operation while a

DC electric motor-driven pump is provided for emergency backup. In the standardized package configuration the oil is cooled by an air cooler. A water cooler can be provided upon customer request.

The thrust and journal bearings are of the tilting pad type. The starting system consists of a V.F.D. motor drive for the single shaft version.

The twin shaft can be equipped with a torque converter plus electric motor or starting expansion turbine.

The GE10 control system has been implemented to assure a high degree of integration and standardization between the engine and the turbine generator package. Programmable modules guarantee easy implementation of any control and protection scheme to tailor the control system to the application and customer needs.

PACKAGE

The package designed for power generation applications is optimized to minimize plant dimensions and to reduce maintenance cost and time. In the standard configuration, the speed reduction gear is mounted on the gas turbine base plate. The auxiliaries are installed on a separate base plate permanently joined to that of the gas turbine base plate to form a single lift on which the sound-insulated enclosure is mounted.

The electric generator is installed on a concrete foundation to limit the shipping dimensions. The overall length of the genset is about 13 m.

The other modules completing the system are the oil/air exchangers, the air intake filter chamber, the suction duct (vertical suction) and the exhaust system (axial exhaust).

The enclosure has a sound pressure level lower than 85 dBA at 1 m. This acoustic design meets ISO NR 50 limits at 100 m.

9 GE Energy Gas Turbines