FUEL CIRCULATING FUEL CELL SYSTEM

PROBLEM TO BE SOLVED: To improve controllability of the pressure difference between poles in a fuel circulating fuel cell system. SOLUTION: A fuel gas, hydrogen, is depressurized by a fuel gas pressure control valve 7, a made to flow through a hydrogen supply channel 8 into an anode humidifier 9, hu...

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Bibliographische Detailangaben
Hauptverfasser:	SUGAWARA TATSUYA, MIYANO KOJI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To improve controllability of the pressure difference between poles in a fuel circulating fuel cell system. SOLUTION: A fuel gas, hydrogen, is depressurized by a fuel gas pressure control valve 7, a made to flow through a hydrogen supply channel 8 into an anode humidifier 9, humidified therein, and fed to the anode of the fuel cell 1. The hydrogen off-gas discharged from the fuel cell 1 is pressurized by a hydrogen pump 11, and returned to the hydrogen supply channel 8 to be circulated. An oxidizing gas, air, is pressurized by a compressor 2, humidified in a cathode humidifier 4, and fed to the cathode of the fuel cell 1. The air off-gas discharged from the fuel cell 1 is released through a pressure control valve 6 into the air. The air pressurized by the compressor 2 is introduced to the fuel gas pressure control valve 7 as a signal pressure, based on which the valve opening of the fuel gas pressure control valve 7 is adjusted so as to hold the pressure difference between the poles of the fuel cell 1 within a predetermined range.