FUEL CELL AND GAS TURBINE COMBINED POWER GENERATION SYSTEM AND START METHOD OF FUEL CELL THEREOF

• Main Authors: TERAMOTO YUICHI, KOGA SHIGENORI
• Format: Patent
• Language: English
• Published: 11.10.2012
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BASIC ELECTRIC ELEMENTS; BLASTING; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; ELECTRICITY; GAS-TURBINE PLANTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; WEAPONS

PROBLEM TO BE SOLVED: To provide a fuel cell and gas turbine combined power generating system capable of performing boosting operation in a short time when a fuel cell is started, and a start method of the fuel cell thereof.SOLUTION: A fuel cell and gas turbine combined power generation system comprises: a discharge air passage Lwhich supplies discharge air 18A discharged from a compressor 14 of a gas turbine 11 to the SOFC13 side; an exhaust air passage Lwhich supplies exhaust air 18B exhausted from the SOFC13 to a gas turbine combustor 16; a fuel gas passage Lwhich supplies a fuel gas 31 to the SOFC13 side; an exhaust fuel gas passage Lwhich supplies an exhaust fuel gas 31A exhausted from the fuel electrode side of the SOFC13 to the gas turbine combustor 16; a communication passage Lwhich branches from the discharge air passage Land temporarily introduces the discharge air 18A into the fuel gas passage L; and replacement gas supply means for supplying a nitrogen gas 41 which replaces the discharge air 18A temporarily introduced into the fuel gas passage L.