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 systemcomparison and assessment were performed, using a process simulation tool, ASPENPlus. 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 combinedcycle) shows the best performance according to the highest thermal efficiency, while theSOFC-STIG (steam injected gas turbine) without air preheating (APH) gives the lowestvalue of efficiency. At a relatively high turbine inlet temperature, the SOFC-HAT (humidair turbine) and SOFC-STIG with APH tend to be competitive systems with theconsiderably simpler system configurations in terms of eliminating a steam cycle,compared to the SOFC-GTCC.