This study deals with a new internal combustion power system with a condensing steam-gas turbine (CSGT) and a circulating fluidized bed coal boiler (CFB) to produce electricity. Heat is delivered to the system by burning gaseous fuel in the CSGT combustor and by using coal combustion heat to generate the superheated steam for injection into the CSGT combustor. The optimization analysis of this novel dual-fuel energy system addresses the thermal efficiency of electric power generation and electric power generated by the system while offering the possibility of premium gaseous fuel saving. The ecological advantages are also identified.

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