Autoren

Zita BAUMANN, Robert BÖWING, Álvaro DÍEZ, Bernadet HOCHFILZER, Alexander ZUSCHNIG, Clément LEROUX INNIO 
Jenbacher GmbH & Co OG, AT

Zusammenfassung

Hydrogen combustion in large gas engines poses a challenge because key fuel gas properties – like minimum ignition energy, ignition delay, and laminar flame speed – differ substantially from the standard gas baseline. To realize a robust combustion concept for high performance power generation, various strategies were analyzed. These include external mixture preparation by port fuel injection and internal mixture preparation by pre-chamber direct injection as well as combustion moderation by port water injection and by exhaust gas recirculation. These studies were carried out using 1D / 3D simulation and single-cylinder and multi-cylinder engine testing. With standard lean burn combustion, the maximum power density inevitably is limited by uncontrolled combustion events, both with port injection and direct injection. In addition, the use of direct injection is not straightforward as the maximum pipeline gas pressure for power generation applications might be too low.
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