Abstract
Anode gas recycling is desirable in solid oxide fuel cell
(SOFC) systems in order to provide water
for steam reforming reactions and to simplify the system
architecture. Possible benefits can
also be achieved for the electrical efficiency and
lifetime. By recycling a certain amount of unused
fuel back to the SOFC, higher efficiencies at low fuel
utilizations can be achieved as the current
efficiency is increased. However, the recycling dilutes
the inlet fuel as the partial pressures of the
reactive components, i.e. hydrogen, carbon monoxide and
methane, are decreased. The diluted fuel
results in decreased cell voltage and thus decreases the
voltage efficiency. In this study, the
magnitude of these counter effects on the electrical
efficiency is experimentally studied. The effect
of the auxiliary power losses, resulting e.g. from the
power consumption of a recycle pump or from
the need of excess air for cooling, on the overall
efficiency are excluded from the study.
Original language | English |
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Title of host publication | 2006 Fuel Cell Seminar |
Subtitle of host publication | Abstracts for Oral and poster Presentations |
Publication status | Published - 2006 |
MoE publication type | Not Eligible |
Event | 30th Fuel Cell Seminar - Honolulu, United States Duration: 13 Nov 2006 → 17 Nov 2006 |
Seminar
Seminar | 30th Fuel Cell Seminar |
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Country/Territory | United States |
City | Honolulu |
Period | 13/11/06 → 17/11/06 |