Low NOx combustion system was developed for gas firing. Most overseas gas turbines are required for firing oil as backup fuel. Low NOx combustion systems for dual fuel firing are required. Lean fuel premix combustion is used for gas and lean fuel diffusion combustion for oil. Basic tests were conducted to optimize a premix fuel-air nozzle and performance was verified in high-pressure combustion tests. Commissioning tests on gas and oil burning were completed at overseas power plants.
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