High-Efficient Power Generation System with Solid Oxide Fuel Cell and Gas Turbine Combination: Comparison of the Combined System with Various Enhanced Gas Turbine Cycles

摘要

Combined power generation systems of solid oxide fuel cell (SOFC) and gas turbine (GT) cycles were evaluated with various configurations of the GT cycle. The system comparison and assessment were performed, using a process simulation tool, ASPEN Plus. Hydrogen gas, assuming to be supplied by an advanced coal gasification process, was considered as the fuel in the evaluation. The SOFC-GTCC (gas turbine combined cycle) shows the best performance according to the highest thermal efficiency, while the SOFC-STIG (steam injected gas turbine) without air preheating (APH) gives the lowest value of efficiency. At a relatively high turbine inlet temperature, the SOFC-HAT (humid air turbine) and SOFC-STIG with APH tend to be competitive systems with the considerably simpler system configurations in terms of eliminating a steam cycle, compared to the SOFC-GTCC.