Siemens Aktiengesellschaft

Siemens Energy Global Gmbh & Co. Kg

Erik Wolf

Henrik Stiesdal

Gerhard Zimmermann

Alexander Tremel

Alexander Hahn

Nicolas Vortmeyer

Manfred Waidhas

Ralf Sigling

Christian Schacherer

Rainer Nies

Tobias Jockenhoevel

Norbert König

Werner Günster

Christopher Schöpplein

Andreas Wiest

Fred Farchmin

Roland Käppner

Thomas Wasser

An electrolysis system for breaking down water into hydrogen and oxygen using at least two electrolysis modules, each electrolysis module having at least two electrolytic cells, an electrolytic cell having an anode compartment and a cathode compartment, the anode compartment being separated from the cathode compartment by a proton exchange membrane, and a switching device, which is compatible with direct current, being arranged electrically in parallel with at least one electrolysis module. The electrolysis system is operated by the at least two electrolysis modules. When the available electrical power decreases, at least one switching device is closed. At least one electrolysis module is bridged by the switching device. The number of electrolysis modules which are then operated is reduced by the number of bridged electrolysis modules. When the available electrical power increases, at least one switching device is opened.

Electrolysis system for breaking down water into hydrogen and oxygen, and a method for operating the electrolysis system

An electrolysis system for electrochemically breaking down water to form hydrogen and oxygen, having at least one electrolyser for electrochemically breaking down water to form hydrogen and oxygen. The electrolysis system also has a housing device for receiving the electrolyser, wherein the electrolyser is at least partially arranged in the housing device and the housing device is sealed relative to a first fluid surrounding the housing device. In the electrolyser, water is broken down to form hydrogen and oxygen. The hydrogen and the oxygen are directed out of the housing device.

Electrolysis system and method for operating an electrolysis system

A connecting element electrically and mechanically connects two electrolytic cell stacks. An electrolysis device includes at least one connecting element of this type and the electrolytic cell stacks are connected by the connecting element. For the hydraulic connection of the electrolytic cell stacks, the connecting element has at least two hydraulic interfaces for each of two water circuits, which water circuits are independent of each other. Furthermore, the connecting element has electrical connection points electrically connected to each other, in order to connect the electrolytic cell stacks in a common circuit. By the connecting element, the connected electrolytic cell stacks can be hydraulically separated or connected to each other, depending on the design.

Connecting element for electrically and mechanically connecting two electrolytic cell stacks, and electrolysis device

In a method for exhaust gas aftertreatment, in which an exhaust gas to be aftertreated, which is produced during combustion of a fuel, is treated with a reducing agent. A constituent of the fuel is hereby also used as a constituent of the reducing agent, with the constituent of the fuel which is also used as a constituent of the reducing agent being hydrogen. The hydrogen is produced from water, and the reducing agent is a mixture of hydrogen and ammonia.

Method for exhaust gas aftertreatment and combustion system

A system to store and to transmit electrical power includes at least one storage system, at least one bidirectional converter, and at least one load coupled to a network, wherein the load is adapted to both, receive electrical power from the network and supply electrical power to the network. A first storage system is used to store electrical power of a power source. The first storage system is connected to a first bidirectional converter by a DC power transmission system. The first bidirectional converter is connected to an AC network and the AC network is connected to a first load.

System to store and to transmit electrical power

A device and a method for using overcapacities in the power grid is provided. In case of an oversupply of energy, the energy is transferred to a thermal storage device directly via a heating element and in the discharge case of the thermal storage device the heat is removed from the thermal storage device and made available to a thermodynamic cycle whereby electrical energy is produced. The heat from the thermal storage device is used to preheat air in an air feed line to a combustion chamber, or fuel is pre-heated using heat from the thermal storage device.

Storage of electrical energy with thermal storage and return through a thermodynamic cycle

The electrical machine includes a movable part and a static part. The movable part rotates in relation to the static part around a dedicated rotary axis. An air-gap is located between the rotating and the static part of the machine. A device is positioned and used to measure the spacing of the air-gap. The static part and/or the movable part is coupled with an actuating-unit, which changes the relative position of the static part in relation to the movable part to adjust the spacing of the air-gap.

Method and arrangement to adjust an air-gap

An energy storage system is provided which includes an electrolyser a hydrogen gas storage and a power plant. The electrolyser is connected to the hydrogen gas storage and the hydrogen gas storage is connected to the power plant. Furthermore, a method for storing and supplying energy is provided which includes delivering electrical energy to an electrolyser; decomposing water into oxygen and hydrogen gas by means of the electrolyser; storing the hydrogen gas; supplying the stored hydrogen gas to a power plant; and producing electrical energy via of the power plant.

Energy storage system and method for storing and supplying energy

The invention relates to a method for increasing the efficiency of a combined gas/steam power station () with integrated gasification combined cycle. Said power station comprises a gas turbine compressor () and an air-separation unit () having a defined working pressure. Compressed air is removed from the gas turbine compressor () at a pressure level that is adapted to the working pressure of the air-separation unit (). The removed air is then supplied to the air-separation unit () where the air is broken down into its individual constituents, especially oxygen and nitrogen. The nitrogen produced in the air-separation unit () is removed from the air-separation unit and at least a part of the removed nitrogen quantity is used as a coolant in the gas/steam power station in order to improve its efficiency.

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Röttenbach, Germany

Erik Wolf