Forschungszentrum Jülich achieved a world record again with fuel cells

 

Scientists at the Research Center Jülich, Germany set a new record for a promising energy technology: Two high-temperature fuel cell stack (stacks) to reach an operating life of 15,000 hours.

Feul cell

Feul cell

Hot candidates for future use in buildings, power plants and vehicles are high-temperature fuel cells with solid electrolyte (Solid oxide fuel cells, SOFCs). They convert chemical energy directly and efficiently into electrical energy – thus they save resources and avoid emissions. Supported by project funds from the EU, were at the Forschungszentrum Jülich “stacks” of the Generation 3 up. When in Jülich pursued so-called planar technology in these stacks the individual cells stacked to increase voltage to achieve.

Scientists at the Institute for Energy Research (IEF) and the Central Technology Division (ZAT) now have two such stacks, each successfully operated 15,000 hours.Dr. Robert Steinberger-Wilckens says “And they delivered on average a benefit of 0.4 watts per square centimeter, about twice what is currently in commercial systems”, Head of the project “Fuel Cell” at the Research Center. For use in vehicles are already 5,000 to 10,000 hours for a stationary power supply, however, operating times in excess of 40,000 hours is required. Steinberger-Wilckens says “We are the aim of such operating times to realize, once again a good to bit closer”.

“Furthermore, we have the cross-country skiers stacks with relatively low 700 ° C. – this age the cells more slowly,” said Steinberger. The aging or degradation of a fuel cell acts as a gradual loss of power off – similar to batteries. It is worth noting at the Jülich stacks that the degradation of the cells on the run so far reached only ten percent. Commonly, the living end of a stack at 20 percent power loss value.

If so, the stacks undisturbed still continue to operate, so in theory they have the potential to create about 30,000 hours – a stack of the type previously unattainable held operating time. Thus they would be for about four years of uninterrupted operation qualifies, if intermittent operation, eg in building heating, the equivalent of a lifetime even five to ten years.

Source: Forschungszentrum Jülich

Posted under Fuel Cells, Hydrogen Economy

This post was written by admin on May 18, 2009

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