Automation of Gas Turbine Performance, Elements of Design and Experience

Lean premixed combustion systems have been deployed on land-based gas turbine engines to reduce emissions, such as NOx and CO2.

These systems have been successful, and in some cases, produce emission levels that are at the lower limits of measurement capabilities, approximately one to three parts per million of NOx and CO2.

Although these systems are a great benefit from a standpoint of emission production, several variables such as the operational envelope of the system and variation in fuel composition, can impact the cycle efficiency.

The operational envelope includes the control of fuel conditions, distribution, and injection into the combustion zones. In the lean premixed combustion system, this has become a critical operating parameter that requires frequent adjustment when ambient atmospheric conditions such as temperature, humidity and pressure change.

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