UNIT OF ASSEMBLIES OF SOLID OXIDE FUEL ELEMENTS WITH COEFFICIENT OF THERMAL EXPANSION EXCEEDING THAT OF THEIR ELECTROLYTE Russian patent published in 1999 - IPC

FIELD: high-temperature solid oxide fuel elements. SUBSTANCE: in accordance with invention solid oxide fuel element presents hollow cylinder made from solid electrolyte with electrodes applied to its surface. Outer electrode is fabricated from material which coefficient of thermal expansion exceeds that of electrolyte. Assembly includes collection of solid oxide fuel elements, end anode and cathode bushings and intermediate bushings used for electric commutation. Coefficient of thermal expansion of bushings is equal to coefficient of thermal expansion of outer electrode of solid oxide fuel element. Unit incorporates at least two assemblies of solid oxide fuel elements, outer spacing rings made from electric insulation material, chambers to feed and remove anode gas in the form of tube board with cover sealed tight and current leads. In unit assemblies are connected in parallel electrically and by anode gas. EFFECT: improved adaptability to manufacture, reduced mass and size characteristics, increased electric and service life parameters. 16 cl, 24 dwg