Abstract: A technique includes providing a mathematical model of reactant production by a reactant processor of a fuel cell system. The technique also includes during a time period in which the fuel cell system is continuously operating, adapting the model based on feedback received from the fuel cell system and controlling the fuel cell system using an indication of the reactant production from the model.

Abstract: A technique that is usable with a fuel cell includes generating first and second oxidant flows from a source oxidant flow. The first oxidant flow is communicated to a cathode chamber of the fuel cell, and the second oxidant flow is communicated to a reactor to oxidize an anode exhaust flow, which is provided by the fuel cell. The generation of the first oxidant flow is regulated based on a state of the reactor.

Abstract: A technique that is usable with a fuel cell stack includes detecting an unhealthy condition of the stack, such as carbon monoxide poisoning, flooding, or fuel starvation, and implementing a recovery action to correct the detected condition. The technique further includes observing the response of the stack to the recovery action to distinguish between unhealthy conditions that have the same indications. In the event that multiple unhealthy conditions are present concurrently, the technique also includes determining an appropriate sequence of recovery actions to correct each of the unhealthy conditions.

Abstract: A technique includes providing a fluid to a heat exchanger to produce a gas. The technique includes humidifying a flow of a fuel cell system with the gas and regulating a level of the fluid in the heat exchanger based on a temperature of the gas.