General Electric 9HA

The 9HA is the 50 hertz member of the HA family of air-cooled, high-efficiency heavy-duty gas turbines, built by GE Vernova and first launched by General Electric in 2014. It comes in two models, the 9HA.01 at 448 MW and the 9HA.02 at 571 MW in simple cycle, and in a combined-cycle plant it is quoted at more than 64 percent net efficiency with the full plant reaching load in under 30 minutes. The DLN 2.6e combustion system uses an advanced premixer that lets the turbine burn rich and lean gaseous fuels, run on up to 50 percent hydrogen and turn down to 30 percent load. Auxiliary systems are supplied as factory-built modules, which the maker says make installation up to 25 percent quicker than for its F-class machines. The HA family traces its design to the H-class programme of about 30 years earlier.