LM2500 Gas Turbine

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LM2500 Combustion Turbine Course MILITARY SEALIFT COMMAND
Ch1 – Overview
1. Enclosures
a. b. c. The General Electric LM2500 gas turbine unit and electric AC generator are skid mounted
and provided with an acoustic enclosure complete with auxiliary and safety systems.
The turbine compartment ventilation air is filtered air from the inlet house. One of two 100
percent capacity vane axial fans pulls air through and out of the compartment for cooling.
The generator compartment is cooled by one of two 100 percent capacity vane axial fans.
The compartment is maintained at a slight positive pressure to prevent explosive gas from
collecting.
Classroom Discussion Point:
The LM2500 gas turbine is available in three different configurations: LM2500 (22MW), LM2500+
(28MW), and LM2500+G4 (32MW). (33,600 shaft hp)
The gas turbines are also used in mechanical drive (such as ship propulsion) and tractor
trailer-mounted temporary duty (TM2500).
The LM2500+ and LM2500+G4 have an extra compressor stage (17). The difference between
the LM2500+ and +G4 is increased mass flow due to design improvements of the blades
(increased compression ratio from 20:1 to 23.1:1).
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