IGCC system has been revealed to be a very attractive power generation system based on coal, promising highly efficient electricity generation and very low environmental impact. The integration of gasifier and power island will be a system engineering. This paper will investigate the influence of IGCC system configuration on system performance. Especially the exhaust heat utilization of syngas from gasifier will be discussed in detail. As the example, one E class gas turbine will be utilized as the core subsystem, the gasifier and HRSG system will be matched. A steady state thermodynamic model for IGCC system is developed on IPSEpro simulation platform and applied to a performance analysis. The characteristics under off-design and design condition for IGCC system were also analyzed.

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