Chemistry: electrical current producing apparatus – product – and – Having magnetic field feature
Reexamination Certificate
2006-09-26
2006-09-26
Kalafut, Stephen J. (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
Having magnetic field feature
C429S006000, C429S006000, C429S006000
Reexamination Certificate
active
07112378
ABSTRACT:
The invention relates to systems and associated methods of operating fuel cell systems where the rotational speed of a reactant humidification enthalpy wheel is dynamically controlled according to various process variables. In one embodiment, a method is provided for operating a fuel cell system, including the following steps: (1) rotating a porous desiccant material about a rotational axis; (2) flowing air through the desiccant material in a direction parallel to the rotational axis to a cathode inlet of a fuel cell; (3) flowing cathode exhaust from the fuel cell through the desiccant material; (4) monitoring a process performance variable; (5) detecting a change in a value of the process performance variable; and (6) varying a rotational speed of the desiccant material in response to the detected change in the value of the process performance variable.
REFERENCES:
patent: 6013385 (2000-01-01), DuBose
patent: 6329090 (2001-12-01), McElroy et al.
patent: 6436562 (2002-08-01), DuBose
patent: 6601402 (2003-08-01), Dunham
patent: 2002/0071979 (2002-06-01), DuBose et al.
patent: 2002/0182463 (2002-12-01), Jones et al.
Eisler Elwood A.
Gutenmann David A.
Kalafut Stephen J.
Plug Power Inc.
Trop Pruner & Hu P.C.
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