FlameSheet is PSM’s advanced combustion system for operators seeking lower emissions, greater fuel flexibility, and extended inspection intervals from their gas turbines. Designed as a drop-in retrofit for GE, Siemens-Westinghouse, and MHI engines, including 7F, 501F, 7EA, 6B,Frame 5, and OP16, FlameSheet is commercially proven with 33 units operating or under contract worldwide. Four units are actively burning hydrogen fuel blends,including a Frame 7E installation that achieved the industry’s first 60% hydrogen by volume at base load with single-digit NOx and CO emissions.
FlameSheet Technical Specifications
- Up to 30% wider operating range with single-digit NOx and CO
- Supports up to 60% hydrogen blends (with HyFlex version)
- Compatible with ethane (up to 40%), butanes (up to 10%), propane (up to 20%)
- Delivers NOx as low as 5ppm while maintaining peaking capability
- Dual-fuel operation (methane/hydrogen mix or alt fuels)
- Rated for 32,000 hours or 1,250 starts between inspections
- Works with existing turbine controllers and fuel skids
- Operates within a 30% Modified Wobbe Index (MWI) range
Durability and maintenance Features
FlameSheet is engineered to lower lifecycle costs and extend plant asset value:
- Designed to reduce cycling fatigue with broad turndown capability
- Minimizes wear with fewer hot combustion components
- Streamlines outage scope with modular installation
- Enhances operational flexibility across a wide fuel spectrum
- Includes optional HRSG protection settings for low-load scenarios
- AutoTune integration included with every FlameSheet installation for automated combustion tuning and emissions optimization
FlameSheet and Alternative Fuels: Proven Performance
FlameSheet is one of the few commercially proven combustion systems capable of burning high hydrogen fuel blends in existing heavy-duty gas turbines, without water, steam, or nitrogen injection. In July 2023, PSM,Thomassen Energy, and Hanwha Power Systems achieved an industry record: a Frame7E gas turbine operating at baseload with 60% hydrogen by volume, achieving single-digit NOx and CO emissions. The installation at the Hanwha/TotalEnergies site in Daesan, South Korea, demonstrated that existing gas turbines equipped with FlameSheet can deliver deep decarbonization while maintaining emissions compliance and dispatch reliability. High-pressure rig testing has demonstrated FlameSheet performance at up to 80% hydrogen. PSM’s development roadmap targets 0 to 100% hydrogen capability, positioning FlameSheet-equipped gas turbines as fully future-proofed assets in the energy transition. PSM and Thomassen Energy have also demonstrated hydrogen co-firing with the LEC III combustion system, successfully operating three Frame 9E turbines in the Netherlands with up to 25% hydrogen since 2018.
Want to learn more about Flamesheet options?
DOWNLOAD THE FlameSheet™ TECHNICAL Brochure (PDF)
