The invention relates to a combination of flat individual cells which each consist of a polymer fixed electrolyte and electrode surfaces applied to both sides to form an electrode diaphragm unit,...
Polymerelektrolyt-Membran-Brennstoffzelle (1999)
The invention relates to a PEM fuel cell, consisting of at least one strip diaphragm (8) which consists of at least 2, maximum 10,000 flat individual cells each comprising an electrode layer (10-12,...
Brennstoffzellenmodul: Streifenmembran (A1) (1998)
The invention relates to an electrochemical cell comprising at least one strip diaphragm forming a core area, said strip diaphragm consisting of at least two, maximum 10,000, flat individual cells,...
Elektrodenmembran-Verbund, Verfahren zu dessen Herstellung sowie dessen Verwendung (1997)
Ledjeff, K., Nolte, R., Bauer, M., Mahlendorf, F., Peinecke, V.
The invention relates to electrode diaphragms consisting of an ion exchange material forming a core area and electrodes for fuel cells or electrolyzers contacting said material on both sides, whereby...
Polymer-Brennstoffzelle (1997)
The invention relates to a fuel cell comprising components such as current diverters, solid polymer electrolytes in the form of diaphragms, gas distribution rings and power distributors as...
Einrichtung zur elektrolytischen Herstellung von Wasserstoff aus Wasser. (1997)
The invention relates to a device for the electrolytic generation of hydrogen from water comprising an electrolytic cell, consisting of anode and cathode chamber separated by an ion-conducting...
Ledjeff, K., Gieshoff, J., Schuler, A.
DE 4317554 A UPAB: 19950117 In addition to the liq. fuel inlet (8) the boiler has several fresh air inlets (41,46) and a water inlet (2). There are several combustion stages (16,20) with catalytic...
Ledjeff, K., Schuler, A., Gieshoff, J.
A water heater has a gas inlet (8) for a combustible gas and air mixture and an inlet for a fluid to be heated (11, 18) which is partially surrounded by at least one fluid chamber (4, 7) filled with...
Wasserstoff-Energiesysteme. (1995)
Stimming, U.(1), Divisek, J. (1), Ledjeff, K. (1), Schnurnberger, W.
High-temperature fuel cell consisting of a porous fuel gas consuming anode, a porous oxygen consuming cathode, between which there is an electrically insulating porous ceramic matrix and molten...
Wasserstoffenergiesysteme (1994)
Stimming, U. (1), Divisek, J. (1), Ledjeff, K. (2), Schnurnberger, W.
The invention relates to a process for the storage and conversion of energy using a H
The invention relates to a catalytic two-stage burner (1) comprising at least one combustible gas feed (3) for a H 50% and a pore size of 0.001 to 100 m, whereby the combustible gas is fed to the...
An electrically conductive gas distribution structure (4) for a fuel cell is arranged between a power distribution element (5) and an electrode (3) connected to a diaphragm electrolyte (1). It is...
A methane accumulator has a pressure-resistant storage tank (1) with a closing device (2, 3) for gas feed and gas discharge. It is filled with a solid substituted polyacetylene polymer (5) having the...
Katalytischer Oxidationsreaktor fuer zuendfaehige Gasgemische (1993)
Es wird ein katalytischer Oxidationsreaktor (10) fuer Gasgemische, die Sauerstoff und zumindest ein mit diesem brennbares Gas aufweisen, vorgeschlagen, wobei der Reaktor (12) mit einem Kuehlmedium...
Wasserstoffrekombinator (1992)
A hydrogen recombiner has a primary recombiner stage (1) in which secondary, tertiary and final recombiner stages (20, 30, 40) are arranged. Catalyst surfaces (11, 21, 31, 41) of a self-limiting...
Schadstofffreie Erdgasnutzung (1992)
Das Fraunhofer-Institut für Solare Energiesysteme erarbeitet zur Zeit für eine österreichische Firmengruppe, bestehend aus ÖMV AG, Grazer Stadtwerken, Steirische Ferngas GesmbH, STEWEAG Graz und...
Elektromobil mit Brennstoffzelle (1992)
Die starke Belastung der Großstädte durch Emissionen aus dem Fahrzeugverkehr haben zu einem starken Interesse an Elektrofahrzeugen geführt. Neben den erheblichen Entwicklungsanstrengungen der...
Das Brennstoffzellen-Haus (1992)
Gieshoff, J., Heinzel, A., Ledjeff, K.
In den vergangenen Jahren haben wir ausgehend von den Konzepten "Solarhaus" und "Wasserstoffhaus" das Projekt "Energieautarkes Solarhaus" entwickelt, das sich mit der Fertigstellung des Baues Ende...
The self-sufficient solar house. Hybrid energy storage system (1991)
For an energetically self-sufficient solar house, a very efficient and maintenance-free energy storage system is required. Therefore, a special hybrid storage system is under construction consisting...
Wasserstoffrekombinator (1990)
A hydrogen recombiner has a recombination tank (1) whose main axis (2) is basically aligned in parallel with the effect of gravity; the recombination tank features inlet valves (12), outlet valves...
Vergleich von Elektrolyseur und Brennstoffzelle mit polymerem Festelektrolyt (1990)
Ahn, J., Heinzel, A., Ledjeff, K.
Energy conversion in electrochemical cells with ion exchange membranes as electrolyte shows some interesting advantages. Membrane systems are especially suitable for small units, because of their...
Ein Schuh oder Stiefel weist einen Sohlenkoerper (4) mit einer Vielzahl von Kammern (12) auf, die mit Speicherkoerpern (13) gefuellt sind. Die Speicherkoerper (13) enthalten Paraffin, dessen...
New hydrogen appliances (1990)
Since many years we are performing applied research in the field of hydrogen technology and our main emphasis lies upon catalytic combustion and fuel cells. Resulting from these efforts we are now...
Ion exchange membranes as electrolyte for electrochemical energy conversion (1990)
Ahn, J., Zylka, D., Heinzel, A., Ledjeff, K.
For solar energy systems long term energy storage with a high efficiency is required. Hydrogen is a suitable energy carrier, its generation by water electrolysis, the conversion into heat by...
Internal reforming for Molten carbonate fuel cells (1990)
Rohrbach, T., Schaumberg, G., Ledjeff, K.
Molten carbonate fuel cell systems can be operated with pure hydrogen or carbonaceous fuel gases, like natural gas. The use of natural gas is of advantage because of the present, widespread...
H2-Kleinsystem für PV-Anlagen (1990)
Gieshoff, J., Ledjeff, K., Zabern, W. Von
Small PV systems are often coupled with liquid gas units to produce heat and electricity in houses for leisure purposes. The PV system consists of the solar panel, a charge controller and the...
Im FhISE konzentrieren sich die Arbeiten zur Speicherung von Solarenergie auf die Wasserstofftechnologie. Die Entwicklung kompletter Wasserstoffspeichersysteme, bestehen aus einem Elektrolyseur zur H...
Aktueller Entwicklungsstand neuer Batteriesysteme (1990)
Neben den bekannten, auf dem Markt eingeführten elektrochemischen Speichern für Elektrizität sind eine Reihe von neuen Systemen in der Entwicklung, Erprobung und Markteinführung, die für neue...
Wasserstofftechnologie - Eine Übersicht (1989)
Übersicht über die Verfahren zur Herstellung, Speicherung und Nutzung von Wasserstoff. Der Einsatz von Wasserstoff als Energiespeicher in autarken Häusern wird erläutert.
Verfahren zur druckgesteuerten katalytischen Verbrennung von Gasen in einem Oxidationsreaktor (1989)
Bei einem Verfahren zur druckgesteuerten katalytischen Verbrennung von brennbaren Gasen, wie Wasserstoff o. dgl. mit Sauerstoff in einem Oxidationsreaktor wird vorgeschlagen, dass einer der beiden in...
Hydrogen activities at the Fraunhofer-Institute for Solar Energy Systems (1989)
Die Arbeiten des Fraunhofer-Institutes für Solare Energiesysteme bezüglich Energiewandlung und -speicherung werden vorgestellt. Die Entwicklung der Karbonatschmelzenbrennstoffzelle in einem...
Wasserstoffsysteme als Energiespeicher für Photovoltaik-Anlagen (1988)
Photovoltaic systems are operated with or without energy storage depending on the applications and the requirements of the loads. There are numerous ways to store energy but in nearly all systems...
Unconventional energy storage systems (1988)
Energy storage systems consist of matching devices for charging and discharging and the energy carrier. In principle all energy carriers (mechanical, electric, thermal, chemical) can be recycled, but...
Iron/chromium-redoxbattery. Battery development for photovoltaic systems (1988)
Reiner, A., Heinzel, A., Ledjeff, K.
The broad application of regenerative energy sources is limited by the high costs for energy storage. Therefore, an economical battery is developed in order to replace the lead acid battery. The...
For application in Cr/Fe redox batteries a fouling-resistant anion exchange membrane was developed by quaternizing a 4-vinylpyridine-co-styrene copolymer with poly (vinylbenzyl chloride). One...
250 W/1 k Wh iron-chromium redox flow storage battery (1988)
Cnobloch, H., Nischik, H., Pantel, K., Ledjeff, K., Heinzel, A., Reiner, A.
Dipl.-Chem.Dr.rer.nat. Herbert Cnobloch, Erlangen; Dipl.-Ing. Herbert Nischik, Erlangen; Kurt Pantel, Erlangen; Siemens AG, Forschungslaboratorien; Dipl.-Phys. Dr.rer.nat. Konstantin Ledjeff,...
Verfahren zur chemischen Reaktivierung einer Redoxzelle (1987)
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Reaktivierung einer vollstaendig oder fast vollstaendig entladenen Redoxzelle. Das erfindungsgemaesse Verfahren ist dadurch...
Application of carbon as a construction material in redox-flow-storage batteries (1986)
Ledjeff, K., Heinzel, A., Cnobloch, H., Nischik, H., Pantel, K.
For application in Cr/Fe redox batteries a fouling-resistant anion exchange membrane was developed by quaternizing a 4-vinylpyridine-co-styrene copolymer with poly (vinylbenzyl chloride). One...
PRECIPITATION PHENOMENA IN HEAVILY DOPED AgCl : Cd2+-CRYSTALS (1976)
Wentz, M., Ledjeff, K., Zierold, K., Granzer, F.
Ionic conductivity-, ITC-, small angle X-ray scattering-, and light scattering measurements were carried out to study precipitation phenomena in heavily doped AgCl : Cd2+ crystals. For ionic...
PRECIPITATION PHENOMENA IN HEAVILY DOPED AgCl : Cd2+-CRYSTALS (1976)
Wentz, M., Ledjeff, K., Zierold, K., Granzer, F.
Ionic conductivity-, ITC-, small angle X-ray scattering-, and light scattering measurements were carried out to study precipitation phenomena in heavily doped AgCl : Cd2+ crystals. For ionic...
PRECIPITATION PHENOMENA IN HEAVILY DOPED AgCl : Cd2+-CRYSTALS (1976)
Wentz, M., Ledjeff, K., Zierold, K., Granzer, F.
Ionic conductivity-, ITC-, small angle X-ray scattering-, and light scattering measurements were carried out to study precipitation phenomena in heavily doped AgCl : Cd2+ crystals. For ionic...