Solid oxide fuel cell and Stirling engine combined system

摘要

PROBLEM TO BE SOLVED: To minimize the heat capacity to enable quick start while improving the power generation efficiency in partial loading. SOLUTION: In the combined system of a solid electrolyte fuel cell a Stirling engine solid electrolyte fuel cell and a Stirling engine, the exit itself of the solid electrolyte fuel cell is made a combustor that burns an un-burned oxidizing agent and a fuel exhausted from the cell to directly transfer the heat by combustion to the solid electrolyte fuel cell. The gas that is burned in the combustor is introduced into a single gas flow path which passes through a heater for the Stirling engine, an air pre-heater and a steam generator for reforming in this order. The temperature of the solid electrolyte fuel cell and the heater for the Stirling engine are controlled constant when the output of the system is controlled in proportional to the electric load.