FIELD: power engineering.
SUBSTANCE: fuel cell system (100) comprises fuel cell (1) to generate power by electrochemical reaction between oxidiser gas fed to oxidiser electrode (34) and fuel gas fed to fuel electrode (67). Fuel gas feed system (HS) feeds fuel gas to fuel electrode (67). Controller (40) serves to control the fuel gas feed system (HS) in feed of fuel gas to fuel electrode (67). Note here that said controller changes the pressure when fuel electrode inlet is closed. Note also that said controller (40) varies fuel gas pressure nearby fuel electrode on the basis of pressure variation first profile for control over pressure at first pressure difference (DP1).
EFFECT: higher homogeneity of fuel gas and decreased stresses applied to fuel cell.
21 cl, 22 dwg
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