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Making Energiewende A Reality

Bavarian utility installs GE’s J920 FleXtra gas engine cogeneration system to support Germany’s energy transition plan

Posted on April 10, 2013

GE’s largest Jenbacher gas engine, the 9.5 MW ecomagination qualified J920 FleXtra, is the centerpiece for the Stadtwerke Rosenheim municipal cogeneration plant expansion in the city of Rosenheim, Germany.

Germany plans to shut down its remaining nuclear power plants by 2022. To replace the massive amount of low carbon, base-load electricity from those plants, the government’s energy transition plan – “Energiewende” – calls for the increased use of natural gas and renewable energy, greater industrial energy efficiency, and an increase of CHP power to 25% of the country’s total energy supply while reducing greenhouse gas emissions by 40% by 2020.

Stadtwerke Rosenheim’s integrated CHP facility also features an existing waste incineration plant and four previously installed Jenbacher engines – three 3.35 MW J620 engines and a 4.4 MW two-stage turbocharged J624 unit. The utility’s upgraded cogeneration facility (36.1 MWel and 43.8 MWth) now meets about 40% of the electricity needs and 20% of the heating requirements of Rosenheim, which has more than 61 000 inhabitants.

GE said that operating a J920 FleXtra at 48.7% electrical efficiency produces more than 76 million kWh of electricity and eliminates approximately 1500 tonnes/yr of CO2 emissions. In cogeneration mode, the company said the J920 FleXtra offers an overall efficiency of  90% and can achieve more than 130 million kWh in primary energy savings – equivalent to the energy contained in more than 76 000 barrels of oil – while reducing CO2 emissions by more than 7800 tonnes.

GE expects the J920 FleXtra will be available in 60Hz regions in 2014.