Hydrogen sensor for fuel processors of a fuel cell

Chemistry: electrical current producing apparatus – product – and – With measuring – testing – or indicating means

Reexamination Certificate

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Details

C205S335000, C205S343000, C205S787500, C204S424000, C204S433000

Reexamination Certificate

active

06841292

ABSTRACT:
A method and apparatus estimate hydrogen concentration in a reformate stream produced by a fuel processor of a fuel cell. A sensor measures carbon monoxide, carbon dioxide, and water in the reformate stream. A fuel meter controls fuel input to the fuel processor. An air meter controls air input to the fuel processor. A water meter controls water input to the fuel processor. A transport delay estimator recursively estimates transport delay of the fuel processor. A hydrogen estimator associated with the transport delay estimator, the air, water and fuel meters, and the sensor estimates hydrogen concentration in the reformate stream. The hydrogen estimator includes a fuel processor model that is adjusted using the estimated transport delay. The carbon monoxide, the carbon dioxide and the water are measured using a nondispersive infrared (NDIR) sensor.

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