Siemens Aktiengesellschaft

Siemens Energy Global Gmbh & Co. Kg

Andreas Reiner

Thomas Hammer

Norbert Huber

Marc Hanebuth

Alexander Hahn

Armin Datz

Jochen Straub

Klaus Dennerlein

Dieter Most

Carola Kuehn

Michael Braunecker

Knut Siegert

Werner Straub

Markus Ungerer

Jochen SCHÄFER

Carola KÜHN

Martin Tackenberg

Roland Käppner

A method of examining a fuel cell by means of a cyclic voltammetry analysis, wherein the cyclic voltammetry analysis is used to ascertain a gas composition in the fuel cell. The fuel cell has a first gas space for a first reactant and a second gas space for a second reactant, where no reactant is supplied at least to one of the two gas spaces, especially to either gas space, during the cyclic voltammetry analysis. The cyclic voltammetry analysis is used to ascertain a concentration of hydrogen in the gas spaces.

Method and system for examining a fuel cell by means of a cyclic voltammetric measurement

A method for cooling a fluid from an electrolysis unit and extracting water from ambient air comprising: conducting moist air having a first molar amount of water and raw water into an evaporator unit in a counterflow at a temperature at or below the boiling temperature of the water; evaporating pure water from the raw water into the moist air and cooling the raw water; conducting the cooled raw water into a heat exchanger thereby cooling the fluid stream of the electrolysis unit; conducting the moist air and the pure water into a water extraction unit; separating a second molar amount of the pure water off from the moist air in the water extraction unit, wherein a third molar amount of water remaining in the air is less than the first; conducting the preheated raw water back to the evaporator; and conducting the cooled fluid back into the electrolysis unit.

Method and device for cooling a fluid stream of an electrolysis unit and for obtaining water

A method for the dry production of a membrane-electrode unit includes assembling a layered configuration including a centrally positioned membrane produced by extrusion and pre-dried at a temperature between 80&#xb0; C. and 100&#xb0; C. for 15 min to 30 min, a substrate-electrode unit on each side of the membrane having an electrode layer applied to a substrate, an optional frame around each substrate-electrode unit for fixing the substrate-electrode unit, and two separating films on outer sides. The configuration is pressed together between two laminating rollers so that a pressure connection is produced at least between the membrane and the electrode layers. A short production time is achieved because it is not necessary to keep the membrane moist at high temperatures under pressure. A membrane electrode unit and a roller configuration are also provided.

Method for the dry production of a membrane electrode unit, membrane electrode unit, and roller arrangement

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Baiersdorf, Germany

Andreas Reiner