Tests of a conductively coupled multi-cell thermionic fuel element

Details Tests of a conductively coupled multi-cell thermionic fuel element Tests of a conductively coupled multi-cell thermionic fuel element

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..552.1119d&link_type=abstract

Space Technology and Applications International Forum - 2001. AIP Conference Proceedings, Volume 552, pp. 1119-1124 (2001).

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Applications

Thermionic Conversion, Spaceborne And Space Research Instruments, Apparatus, And Components

Scientific paper

A three cell conductively coupled thermionic fuel element (TFE) was assembled using a W-Sc2O3-W emitter trilayer, Ta intercell connectors and a Nb-Al2O3-Nb collector trilayer. An electric heater supplied heat through radiation to the fuel clad. Current-voltage (IV) characteristics were obtained at emitter temperatures from 1650 K to 1800 K. A comparison with IV curves calculated with TECMDL indicates that the emitter bare work functions were around 5.1 eV. The agreement between calculated and observed voltages demonstrates that the 3 cells were indeed in series, thereby validating the feasibility of the conductively coupled multi-cell TFE, which is applicable to both nuclear and solar space power sources. .

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