Diesel or JP-8 fueled SOFC power systems are envisioned for both critical and non-critical military use such as auxiliary power units (APUs), portable power, tent cities, camp kitchens, and permanent stationary power . A system that eliminates or minimizes the addition of make-up water is a great advantage in these applications. This paper presents an approach for water recovery from the spent anode exhaust gas for use in the JP-8 steam reformer . A key objective of this on-going effort is to configure an internal water management scheme for the system to recover water for the JP-8 fuel processor steam-reforming requirements. The approach used was to combust the water-laden SOFC anode exhaust gas (AEG), condense and recycle the water to the reformer. HYSYS simulation performed on the configured system indicated that over 91% of fuel processor water requirements can be obtained in this approach to maintain a steam-to-carbon (S/C) ratio of 4. The S/C ratio was set at 4 to ensure a high JP-8 conversion and prevent carbon formation in the reformer. Operational tests at simulated system conditions confirmed >91% water recovery as predicted. System tests of this scheme indicate that it is feasible to combust and recover product water for reforming, minimizing makeup water requirements. The results from the system tests are promising for configuring stationary power systems for military use where water availability is limited.
- Nanotechnology Institute
Water Management Scheme for a 3-kW JP-8 Steam Reformer-SOFC Power System
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Sishtla, C, Wangerow, JR, Hill, AH, Onischak, M, & Holcomb, FH. "Water Management Scheme for a 3-kW JP-8 Steam Reformer-SOFC Power System." Proceedings of the ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. Denver, Colorado, USA. June 16–18, 2008. pp. 469-474. ASME. https://doi.org/10.1115/FuelCell2008-65233
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