LM2500 STIG Aeroderivative Gas Turbines

Fully Flexible Operating Cycle

Steam Injected Gas Turbine (STIG) systems operate with an enhanced cycle, which uses large volumes of steam to increase power and improve efficiency. In the STIG cycle, steam is typically produced in a heat recovery steam generator (HRSG) and is then injected into the gas turbine.

The site at which steam is injected into the gas turbine differs according to the design of the particular model. In the LM2500, steam is injected into the high-pressure section via the combustor fuel nozzles and compressor discharge plenum.
Features & Benefits

The STIG system offers a fully flexible operating cycle, since the amount of steam injected can vary with load requirements and steam availability. Also, steam can be injected with the gas turbine operating from 50 percent power to full load.

Features of the 28.2 MWe LM2500 STIG include:

  • Direct-drive for power generation
  • Variable steam injection rate
  • Absorbs excess steam when process demand is low
  • Injects maximum steam when electric prices are high
  • 25 percent more power than LM2500
  • Ideal for cogeneration
  • Easy on-site maintenance
  • Dual fuel capability (distillate or gas)

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