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Humidifier for fuel cell using high conductivity carbon foam

United States Patent

December 12, 2006
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A method and apparatus of supplying humid air to a fuel cell is disclosed. The extremely high thermal conductivity of some graphite foams lends itself to enhance significantly the ability to humidify supply air for a fuel cell. By utilizing a high conductivity pitch-derived graphite foam, thermal conductivity being as high as 187 W/mK, the heat from the heat source is more efficiently transferred to the water for evaporation, thus the system does not cool significantly due to the evaporation of the water and, consequently, the air reaches a higher humidity ratio.
Klett; James W. (Knoxville, TN), Stinton; David P. (Knoxville, TN)
UT-Battelle, LLC (Oak Ridge, TN)
10/ 389,379
March 14, 2003
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH The United States Government has rights in this invention pursuant to contract DE-AC05-00OR22725 between the United States Department of Energy and UT-Battelle, LLC.