GE breaks turbine energy efficiency record using additive manufacturing

GE's HA fleet status report as of November 27th 2017. Image via GE PowerGE’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.

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