Hybrid fuel cell gas turbine (FC/GT) combined cycle systems

Transient Analysis of 220 kW Solid Oxide Fuel Cell-Gas Turbine Hybrid System Using Computational Fluid Dynamics Results

“…250 kW to 1.5 MW) matches well with the current size of MTGs (16). Some of the hybrid fuel cell gas turbine challenges that have been previously identified by Brouwer et al are listed in Table I (16). One of these challenges, compressor surge, is the focus of the current investigation.…”

“…Among the features that allow the integration of MTG with SOFC, the following points were mentioned by Brouwer: 1) SOFC exhaust temperature and MTG inlet temperature are well-matched; 2) MTGs operate at relatively lower pressure ratios that makes integration easier; 3) MTGs often use recuperation in order to improve the system efficiency; 4) MTGs allow fuel cells to operate under higher pressures which improves the cell performance; 5) thermal energy amount and quality (temperature) contained in the SOFC exhaust is sufficient for MTG turbine inlet conditions to produce compressor power (for the fuel cell pressurization) and an electric power generator (that produces additional electricity); 6) the size of current fuel cell systems (e.g. 250 kW to 1.5 MW) matches well with the current size of MTGs (16). Some of the hybrid fuel cell gas turbine challenges that have been previously identified by Brouwer et al are listed in Table I (16).…”