GE to deliver more efficient gas engines to German market

As Germany transitions to greater energy efficiency through its Energy Transition plan, it looks to increase the use of natural gas to enable renewable energy and reduce emissions.

Helping to promote energy security in Europe, GE’s Distributed Power worked with pilot customer Stadtwerke Rosenheim to develop a modification and upgrade for its Jenbacher J920 FleXtra gas engine that increases the power output of the engine by nearly 10 percent–an increase from 9.5 MW to 10.38 MW for the 50-hertz unit.

The power boost of more than 0.8 MW electrical output has increased the number of European homes that can be served with power from 18,500 homes to more than 20,000, and this additional output comes from the existing engine, which has been upgraded. The modified and upgraded pilot engine already contributed reliably to the power and heat supply of the city of Rosenheim last winter.

GE‘s Jenbacher 50-hertz J920 FleXtra gas engine breaks the 10 MW threshold. Illustrated by the example of a 100 MW power plant where it can now meet the net power output with one less engine.

The natural gas-fired Jenbacher J920 FleXtra combined heat and power system (CHP) provides electricity and thermal power (hot water) for local residents and industrial customers with a lower carbon footprint compared to conventional power plants, supporting Germany‘s effort to reduce greenhouse emissions by 40 percent by 2020.

Also, the Jenbacher J920 FleXtra gas engine’s short startup time increases Stadtwerke Rosenheim’s operational flexibility to overcome the challenges of intermittency associated with adding more wind, solar and other renewable energy supplies.

“European customers are searching for cost-effective solutions to cover their energy demands, and regulations require high total energy efficiency and low emissions. Using a Jenbacher J920 FleXtra gas engine for CHP applications and reaching a total energy efficiency of 90 percent and more is a very attractive option for municipality customers, as it can provide an environment-friendly, reliable and economical solution to meeting the region’s energy demand,” said Niall Prendiville, general manager, J920 FleXtra product line for GE’s Distributed Power. “GE and Stadtwerke Rosenheim share more than a decade of gas engine innovation, which made the company an excellent associate to work with to develop this modification and upgrade that will help it provide more flexible power and heat to its business and residential customers.”

The modification and upgrade is part of the planned evolution of the Jenbacher J920 FleXtra gas engine. Two-stage turbo charging with higher boost pressure is the enabler for such upgrades and increasing power output. The Jenbacher J920 FleXtra gas engine is now a 10.38-MW engine manufactured in the company’s Jenbach, Austria, facility. The new 10.38-MW offering is for 50-hertz applications, while the 9.34-MW offering is for 60-hertz applications.

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The Clarion Energy Content Team is made up of editors from various publications, including POWERGRID International, Power Engineering, Renewable Energy World, Hydro Review, Smart Energy International, and Power Engineering International. Contact the content lead for this publication at

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