Chemistry: electrical current producing apparatus – product – and – Fuel cell – subcombination thereof – or method of making or... – Process or means for control of operation
Reexamination Certificate
2011-08-16
2011-08-16
Lee, Cynthia (Department: 1726)
Chemistry: electrical current producing apparatus, product, and
Fuel cell, subcombination thereof, or method of making or...
Process or means for control of operation
C429S408000, C429S416000, C429S423000, C429S428000, C429S433000, C429S434000, C429S435000, C429S440000
Reexamination Certificate
active
07998632
ABSTRACT:
An SOFC fuel cell stack system in accordance with the invention including a recycle flow leg for recycling a portion of the anode tail gas into the inlet of an associated hydrocarbon reformer supplying reformate to the stack. The recycle leg includes a controllable pump for varying the flow rate of tail gas. Preferably, a heat exchanger is provided in the leg ahead of the pump for cooling the tail gas via heat exchange with incoming cathode air. A low-wattage electrical reheater is also preferably included between the heat exchanger and the pump to maintain the temperature of tail gas entering the pump, during conditions of low tail gas flow, at a drybulb temperature above the dewpoint of the tail gas.
REFERENCES:
patent: 4128700 (1978-12-01), Sederquist
patent: 7056611 (2006-06-01), Fabis et al.
patent: 2004/0013913 (2004-01-01), Fabis et al.
patent: 2005/0074642 (2005-04-01), Foger
patent: 2006/0251939 (2006-11-01), Bandhauer et al.
patent: 1 557 896 (2005-07-01), None
EP Search Report dated Sep. 21, 2006.
Geiger Gail E.
Kelly Sean M.
MacBain John A.
Shaffer Steven R.
Delphi Technologies Inc.
Lee Cynthia
Twomey Thomas N.
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