Manufacturing Industry
Cell Voltage Tags Gas Leaks.(researchers from Siemens Aktiengesellschaft develop method for detecting fuel cell gas leakage)(Company Business and Marketing)(Product Information)(Brief Article)
Fuel Cell Technology News, January, 2001
Siemens Aktiengesellschaft (Munich, DE) researchers have developed a way of identifying a gas leak between anode and cathode gas areas in a PEM fuel cell system by detecting the cell voltage. The anode and cathode gas areas are first purged with nitrogen. The cathode gas area is then filled with oxygen and the anode gas area is filled with hydrogen. A drop in the cell voltage below a limit value as a function of time is then measured and evaluated.
The method ensures reliable identification of the gas leak. Siemens researchers Willi Bette and Josef Lersch earned U.S. Patent 6,156,447 for the sensor. Each individual cell can be examined individually using the method. It avoids the disadvantage of an integral measurement, where all that can be decided is whether...
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