Dependence of unburnt ammonia on combustor inlet temperature of ammonia combustor of micro gas turbine

Abstract

It is important to increase combustion efficiency of ammonia gas-turbine combustor. Concentration of unburnt ammonia depends strongly on combustor inlet temperature in the case of the previous combustor. Emissions of unburnt ammonia is high under 500℃ of combustor inlet temperature. In the case of rich-lean low-NOx combustor, concentration of unburnt ammonia does not depend on combustor inlet temperature. Low emission of unburnt ammonia of 15ppm (16%O₂) is recorded at 313℃ of combustor inlet temperature. In the case of rich-lean low-NOx combustor, it is thought that the gas-turbine without regenerative heat exchanger can apply high combustion efficiency to ammonia combustor. It means that it can be used for the larger gas-turbine systems.