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The excess oxygen is the amount of oxygen in the incoming air not used during combustion and is related to percentage excess air. For example, 15% excess air equals 3% oxygen while firing natural gas.
Method for operating a fuel cell system, computer program product, control unit and fuel cell system
PendingDE102024211013A1Battery/fuel cell control arrangementAdaptive controlThermodynamicsFuel cells
The invention relates to a method for operating a fuel cell system (FCS) in different operating modes, in which different limit values (k1, k2, k3, k4) for control variables (RG): - an exit activity (a out ), - an exit oxygen partial pressure (p O2out ) and / or - a flow velocity is used in a cathode path, where different control variables (CV): - a pressure (pair) of an inlet air or an inlet oxygen partial pressure (pO2in), - an excess of oxygen (λO2), - a stack stream (iS) and - a stack temperature (T S ) based on limit values (k1, k2, k3, k4), which are particularly relevant in cost functions (f Grenz,Aktiv , f Grenz,Partial ) for the control variables (RG) are taken into account and set in an optimization-based manner.
Owner:ROBERT BOSCH GMBH