The GE™ LM2500 is the workhorse of aeroderivative gas turbines, with more than 1,500 units in service and over 22 million operating hours with a variety of fuels and fuel/water combinations. Availability for the GE™ LM2500 is an outstanding 99.6%, requiring just 40 hours of major maintenance for each 10,000 operating hours. It is rated up to 33,600 shaft horsepower with a thermal efficiency of 37% and is rated to produce 20-25 megawatts of electricity. The GE™ LM2500, derived from GE’s TF39/CF6-6 high bypass aircraft engine, is a single spool gas generator with a 16-stage compressor, annular combustor, two-stage high pressure turbine, and an aerodynamically coupled power turbine. The GE™ LM2500 has applications ranging from gas line compression, cogeneration and offshore platform power to naval and cruise ship propulsion.
The LM2500+ is a high performance version of the GE™ LM2500 with an additional stage zero blisk and variable guide vane, higher flow, improved efficiency compressor, technically advanced materials and coatings in the high pressure turbine and a redesigned power turbine. It is rated up to 28.6 megawatts, 40,500 shaft horsepower at a thermal efficiency of 39%. Applications include cogeneration, combined cycle, marine and fast ferry.
The GE™ LM5000, derived from the CF6-50 high bypass aircraft engine, is a two rotor gas generator with an aerodynamically driven, three stage power turbine. The low pressure system consists of a five stage compressor and singe stage turbine, while the high pressure system has a 14 stage compressor and two stage turbine powered by an annular combustor. With steam injection simple cycle efficiency is 38% and power output is 52 megawatts at 55,000 shaft horsepower. There are approximately 70 GE™ LM5000s in service worldwide. Applications include combined cycle and cogeneration, as well as offshore oil platform power.
The GE™ LM6000 is a derivative of the CF6-80C2 high bypass aircraft engine and, with a thermal efficiency of over 40%, is the most fuel-efficient simple cycle gas turbine in its class. There are over 250 GE™ LM6000s in service with over two million operating hours. The engine is a two rotor gas turbine with a five stage low pressure compressor, 14 stage high pressure compressor, annular combustor, two stage high pressure turbine and a five stage low pressure turbine. The power turbine, unlike the GE™ LM2500 and GE™ LM5000, is mechanically coupled to the low pressure compressor, which means it drives both the load and the low pressure compressor. As a result, the LM6000 can be used in both hot and cold end drive applications. Shaft horsepower is 54,610 and with the introduction of Spray Inter-cooling (SPRINT) and Enhanced Sprint (E-Sprint), power output can be augmented up to 47.5 megawatts or more. The GE™ LM6000 has such applications as a power generation, cogeneration, fast ferry and high-speed cargo ship propulsion.