GE’s largest and most efficient gas turbine the HA, nicknamed HArriet, has broken its own net efficiency record. Beating previous orders at 63.7% efficiency, the HA is now available at 64% under conditions recorded at a test plant in Greenville, South Carolina. The company attributes this feat to “combustion breakthroughs through constant innovation,” and applying additive manufacturing to a number of the turbine’s key components.
HA efficiency in figures
GE H-Class gas turbines are used by over 70 customers in combined cycle power plants around the world. By redirecting the waste heat generated by a gas turbine to a steam turbine, combined cycle power plants produce 50 % more electricity from the same fuel, i.e. natural gas, than a traditional simple-cycle plant.
Just 18 months prior to this new record, a 9HA.01 turbine earned a Guinness World Record for powering the world’s most efficient combined-cycle power plant. At the site in Bouchain, France, the GE 9HA produces enough energy to power 680,000 homes with an output of 605 MW.