Jenbacher


Turbocharger bypass


Function The turbocharger bypass enables a controlled flow of cold fuel air mixture from a bypass-T after the intercooler back to the gas mixer. The turbocharger bypass can shift the operating point of the turbocharger and enhance the operating flexibility. In addition the bypass system can control the engine output in the upper load range to provide improved accuracy and efficiency compared to that of a throttle valve.


Benefit • Improved performance characteristic enhancement of the turbocharger based on the application


• Increased operational condition flexibility regarding ambient conditions (such as intake air temperature and altitude)


• Increased dynamic in controlling the output, spinning reserve on demand


• Enhanced response and control performance in island mode operation


• Increased flexibility by shifting the turbocharger surging limit


Innovative technology Innovative technologies focus on the exhaust gas side (waste gate) and report a theoretical advantage in efficiency due to lower backpressure. However, the significantly more challenging operating conditions due to the hot exhaust gas result in decreased reliability and reduced service life of the waste gate in many cases.


Status The turbocharger bypass has been part of GE’s Jenbacher gas engines standard scope of supply for all engines since 1996.


Benefits • Reduced product and life-cycle costs: The new high-performance spark plugs enable high power density of the gas engine, allowing for reduced costs


• Increased regapping intervals and a longer service life lead to lower spark plug costs


• Simple and reliable regapping with the new tools for JenP7 and JenP503


• Highly efficient combustion without misfiring even at low NOx emissions – provided by the shielded type P3V3 spark plug


Status The result of a long-term spark plug strategy, P3 and P7 spark plugs incorporate fourth generation technology based on GE’s Jenbacher spark plug types P1, P2 and P4. P3V3N1 is the latest spark plug development introduced 2010 and offers further performance improvements. The JenP603 is available for dedicated engine versions of type 6 since 2015 (500 mg NOx versions only).


GE spark plugs JenP3V3, JenP7 and JenP603


Function High-performance spark plugs are required to secure ignition of modern high performance lean burn gas engines. The advanced design of spark plugs for GE’s Jenbacher type 2, 3 and 4 open chamber gas engines and type 6 prechamber engines enables a lean and efficient combustion without misfiring or knocking.


The P3 and P7 spark plugs can be regapped, providing an expected service life of up to 14,000 operating hours. Comparable spark plugs – designed as pre-chamber spark plugs – do not allow a regapping limiting their service life to only 4,000 to 6,000 operating hours. Silicon (Si) deposits from biogas or landfill gas (LFG) affect the combustion of standard pre-chamber spark plugs. The new spark plug JenP603 for type 6 offers as well a significant extended life time vs. the previous Denso 518. As well for JenP7 and JP603 regapping tools are available on demand.


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