Abstract:

：A system coupled with gas turbine and oxygen-enriched combustion is studied. The gas turbine is driven by compressed air which is heated by the waste heat of flue gas and the high temperature heating surface of the boiler, gas turbine provides compressed air for air separation units(ASU), and gas turbine is also the primary motivation of CO₂compressor, and the system coupling air separation unit with dynamic system, The thermodynamic and economic analysis of the new system are carried out, and the power supply efficiency and the power supply cost are calculated. The results show that theβ being 0.8 and the efficiency of gas turbine being 0.32 the net efficiency of the new system can be increased by 4.2% compared with the conventional oxy-enriched combustion system, and the power supply cost being reduced by 0.044 RMB/(kW·h).

Key words: air separation units, oxygen-enriched combustion, power supply efficiency, techno-economic study, gas turbines