Effect of hydrogen on materials

Stress-strain curves of hollow samples filled with hydrogen or nitrogen, with an internal pressure of 70 bar, tested at a draw-off rate of 3.5 µm/min.
Stress-strain curves of hollow samples filled with hydrogen or nitrogen, with an internal pressure of 70 bar, tested at a draw-off rate of 3.5 µm/min.

Atomic hydrogen partly diffuses into materials during production and operation. If this results in degradation of the material properties, the term hydrogen embrittlement is used. The Fraunhofer IWM has set itself the task of better understanding and mastering such chemical processes and their consequences. For this purpose, a new laboratory for material qualification for hydrogen applications has now been set up.

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The optimized use of HT-PEM fuel cells in CHP units

CISTEM-reformer
Reformer, developed by ICI-Caldaie Spa

Intelligent power networks and smart grid systems are demanding increasingly decentralized technologies that combine the storage and conversion of energy. Before this backdrop, in the scope of the EU’s CISTEM project (Construction of Improved HT-PEM MEAs and Stacks for Long Term Stable Modular CHP Units), a combined heat and power technology (CHP) has been developed on the basis of high temperature polymer electrolyte membrane fuel cells (HT-PEM FCs), which is able to provide an electrical output of up to 100 kWel. In addition to electricity generation, the heat produced by the HT-PEM fuel cell is used locally

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