FUEL CELL SYSTEM, AND OPERATING METHOD OF FUEL CELL SYSTEM

摘要

PROBLEM TO BE SOLVED: To improve durability by efficiently removing carbon deposited on a fuel electrode and preventing mechanical damage.

SOLUTION: The fuel cell system is provided with a fuel cell B carrying out power generation by respectively carrying out flow contact of fuel gas and air with a fuel electrode 61 and an air electrode 62 of a solid electrolyte cell, and a gas feeding part E1 feeding hydrogen-containing gas or gaseous hydrogen toward the fuel electrode 61. A gas feeding starting means is provided for starting feeding of the hydrogen-containing gas or the gaseous hydrogen to the fuel electrode 61 via the gas feeding part E1 after stopping feeding of the fuel gas to the fuel cell B.

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