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As well as electricity, considerable amounts of heat are generated in solid oxide fuel cells. This heat has to be taken out of the module, mainly by air flow, in order to ensure stable operational conditions and to prevent superheating of the units. The mechanisms and effects associated with this problem were modelled in order to obtain information concerning the characteristic current density, temperature distribution and efficiency of the cells. The modelling showed that: - temperatures of the gases involved coincide to within a few degrees with the temperatures of the cell components; - reasonable fuel utilisation and efficiency can be achieved for both monolithic and tubular designs; - for the tubular design investigated, large temperature gradients are inherent; - temperature distributions of cross flow monolithic designs are significantly flatter than those of tubes; - the kinetics of the steam reforming reaction occurring in cell operation with internal reforming of methane strongly affects the temperature distribution within a module.

Additional information

Authors: ERDLE E, Postfach 1360, Friedrischshafen (DE);GROSS J, Postfach 1360, Friedrischshafen (DE);MÜLLER H G, Postfach 1360, Friedrischshafen (DE);MÜLLER W J C, Postfach 1360, Friedrischshafen (DE);SONNENSCHEIN R, Postfach 1360, Friedrischshafen (DE)
Bibliographic Reference: EUR 13158 EN (1991) 125 pp., MF, ECU 8, blow-up copy ECU 16.25
Availability: (2)
Record Number: 199110358 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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