Abstract
A system-level simulation tool was developed to understand the challenging trade-offs in integrating PEM fuel cells with both reforming of liquid-fuels (modeled as C12H23) for H2 production and H2 purification with membrane reactors. The model performs iterative detailed thermochemical calculations for mass, species, and energy balances at a component level to assess component operating temperatures and parasitic loads due to compressors (for the cathode flow, autothermal reformer air flow, and anode recirculation flow), pumps (for liquid fuel and water flows for the reformer), and cooling fans (for the fuel cell radiator and the exhaust condenser for water recovery). The results indicate that with current PEM fuel cell polarization curves, thermal efficiencies > 30% can be achieved when parasitic loads are low and fuel cell voltages are high (> 0.75). Water balance can be sustained for the system studied when effective ambient temperatures are <= 40 {degree sign}C.
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