The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 2011
Filed:
Aug. 31, 2006
Mark J. Moran, Northampton, MA (US);
Venkateshwarlu Yadha, Manchester, CT (US);
Matthew P. Wilson, Groton, CT (US);
Mark J. Moran, Northampton, MA (US);
Venkateshwarlu Yadha, Manchester, CT (US);
Matthew P. Wilson, Groton, CT (US);
UTC Power Corporation, South Windsor, CT (US);
Abstract
A fuel cell power plant () having a stack of fuel cells (), each having an anode (), a fuel reactant gas flow field plate (), a cathode (), an oxidant reactant gas flow field plate (), and an electrolyte () between the anode and cathode. The stack has coolant channels (), an air blower (), air inlet () and outlet () valves, and a cathode recycle loop using either the primary air blower or a cathode recycle blower (). A shutdown process includes recycling air through the cathodes with only one of an air inlet valve or air exit valve closed, while applying fresh fuel and recycling fuel through the anodes until oxygen is about 4% or less, or average cell voltage is about 0.2 or less, or for predetermined period of time.