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Approach of solving humidification device turndown ratio for proton exchange membrane fuel cells

United States Patent Application

20070218326
A1
View the Complete Application at the US Patent & Trademark Office
An apparatus and method for controlling humidification device turndown ratio for proton exchange membrane fuel cells includes a proton exchange membrane fuel cell, a humidifier, a water separator for directing water vapor from the proton exchange membrane fuel cell to the humidifier, a bypass valve to regulate vapor flow into the humidifier, a turbo-compressor and control valve for regulating temperature of air flow into the humidifier, and an expansion turbine for recovery of energy from the humidifier and bypass valve.
Liu, Chung Y. (Cerritos, CA), Ahle, Karen M. (Manhattan Beach, CA), Loeffelholz, David W. (Long Beach, CA)
HONEYWELL INTERNATIONAL, INC.
11/ 378,515
March 17, 2006
GOVERNMENT RIGHTS [0001] This invention was made with Government support under contract DE-FC36-03GO13109 awarded by the United States Department of Energy. The Government has certain rights in this invention.