Nearly 60% LHV efficiency (54% HHV efficiency) was reached in the
Baglan Bay power station, using a GE H-technology gas turbine with a NEM 3 pressure reheat boiler, using steam from the heat recovery steam generator (HRSG) to cool the turbine blades.[
citation needed]
In May 2011
Siemens AG announced they had achieved a 60.75% efficiency with a 578 megawatt SGT5-8000H gas turbine at the
Irsching Power Station.
[17]
The
Chubu Electric’s
Nishi-ku, Nagoya power plant 405 MW 7HA is expected to have 62% gross combined cycle efficiency.
[18]
On April 28, 2016, the plant run by
Électricité de France in
Bouchain was certified by Guinness World Records as the world's most efficient combined cycle power plant at 62.22%. It uses a
General Electric 9HA, that claimed 41.5% simple cycle efficiency and 61.4% in combined cycle mode, with a gas turbine output of 397 MW to 470 MW and a combined output of 592 MW to 701 MW. Its firing temperature is between 2,600 and 2,900 °F (1,430 and 1,590 °C), its
overall pressure ratio is 21.8 to 1.
[19]
In December 2016,
Mitsubishi claimed a LHV efficiency of greater than 63% for some members of its J Series turbines.
[20]
In December 2017, GE claimed 64% in its latest 826 MW HA plant, up from 63.7%. They said this was due to advances in
additive manufacturing and combustion. Their press release said that they planned to achieve 65% by the early 2020s.
[1]
