Although wet compression has long been used to boost the capacity of industrial frame combustion turbines, only recently has this technique been applied to aeroderivative engines like the GE LM2500PE. The principles are similar, but not identical: subtle differences affect the design of the spray system, the inlet duct arrangement, control system integration, and turbine protective devices. Tests demonstrated a net gain of 1.6MW for the turbine and 1.8MW for the plant whenever ambient wet-bulb temperature is higher than 50F.