Operations and Maintenance for LM2500 Gas Turbine engines.
Chapter 1 – LM2500 Gas Turbine Overview
This chapter provides a brief overview of the LM2500 gas turbine components and support
systems. The LM2500 is an aero-derivative design gas turbine. For this course, a base
LM2500 unit with a single annular combustor is used.
Chapter 2 – Inlet Air System
The air that is used for combustion and turbine compartment cooling is provided by the inlet
air system. This system will condition ambient air via heat exchangers, filters, or other
cooling device for use in the turbine.
Chapter 3 – Accessory Drive
This chapter reviews the operation and purpose of the accessory gearbox. The AGB
provides the motive force, from the compressor shaft, for several pumps and accepts input
torque during startup.
Chapter 4 – Compressor Section
The compressor section provides high-pressure, high-temperature combustion air. The
compressor contains equipment to prevent compressor stall and is a source for cooling air
used throughout the machine.
Chapter 5 – Fuel Gas System
This chapter provides a review of the fuel gas delivery system; it includes a description of
the equipment used to create combustion and how the process occurs to create
Chapter 6 – Turbine Section
The LM2500 contains a two-stage, high-pressure turbine to drive the compressor. A
second, 6-stage low pressure turbine section drives the generator.
Chapter 7 – Lube Oil System
The combustion turbine contains a unique lube oil system, which allows for the high-speed
rotation of both HP and LP systems. A second oil system for the generator provides
service for its operation.
Chapter 8 – Hydraulic Oil Systems
This gas turbine contains two hydraulic systems; the control oil system to provide the
hydraulic force to operate the variable stator vanes and the hydraulic oil system to provide
the force for the gas control valve and water injection flow control valve.
Chapter 9 – Hydraulic Start System
This chapter covers the operation of the remote hydraulic start system used by this
combustion turbine. The system includes a skid and local hydraulic pump that rolls the
machine from the accessory gearbox.
Chapter 10 – Firing
This is a step by step sequence of starting the combustion turbine from zero speed to full
load. There are a few important hold points that are covered in detail.
Chapter 11 – Generator Overview
This chapter provides an overview of the electric generator driven by the low-pressure
turbine section. The generator converts the mechanical torque of the gas turbine into
electrical power that will be exported to the local grid.
Chapter 12 – Turbine Troubleshooting
This section will provide the list common issues which may occur during the operation of
the combustion turbine. Each event has the conditions and actions listed.
Chapter 13 – Combustion Turbine Maintenance
This section provides a list of typical preventive maintenance activities for the combustion
turbine. The list is arranged by interval and list general steps with its performance.