Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Tapping into Previously Unused Green Electricity

11.03.2013
A highly dynamic technology from Siemens should make it possible to store wind and solar-generated electricity that would previously have gone unused by converting excess power into hydrogen.

Electrolysis can react to fluctuations in the supply generated by renewable energy in a matter of milliseconds - much faster than previous methods. The prototype of a storage facility equipped with PEM technology produces between two and six kilograms of hydrogen per hour.



One such facility, which is rated at 0.3 megawatts at peak capacity, went into operation at the Coal Innovation Centre at the RWE power plant in Nieder­außem as part of the CO2RRECT (CO2‑Reaction using Regenerative Energies and Catalytic Technologies) project.

It will simulate operational situations resulting from conditions that could be caused by fluctuations in the amount of electricity fed into the grid. Siemens and its partners in the project, including RWE, Bayer, and ten academic institutions, aim to use electrolytically harvested hydrogen to convert carbon dioxide into a raw material that can be used in the industrial production of chemicals.

Energy storage facilities for electricity from renewable sources are important components of the energy transition. Compressed hydrogen gas has a high energy density and could be stored in underground salt caverns, for example. When desired, the hydrogen can be converted to electricity, and it can also be used as a fuel and as a raw material for industry. Until now, electrolysis facilities were not conceived or designed to be able to react flexibly to large energy fluctuations.

At Siemens' Industry Sector a new low-maintenance electrolysis technology has been developed based on research from Corporate Technology. In the electrolyzer a proton exchange membrane (PEM) separates the electrodes on which hydrogen and oxygen form. One reason this electrolyzer can react so quickly is that the membrane is very stable in response to pressure differences in the two gas chambers. Because it is equipped with internal cooling and is designed for high current densities, it can easily handle three times its rated capacity for some time and needs almost no electricity at all when in standby mode.

Smaller versions of this system could soon be installed at filling stations to produce hydrogen for fuel cell vehicles. Modular systems with outputs of up to ten megawatts should be available in a few years. These would be appropriate for industrial and other applications.

In the long term, systems using PEM electrolysis should be able to operate in the triple-digit megawatt range that would be necessary to handle the output of offshore wind farms and/or provide load balancing capacity for primary and secondary control reserves. Siemens will continue to develop the design, materials, and manufacturing processes for PEM electrolysis.

Dr. Norbert Aschenbrenner | Siemens InnovationNews
Further information:
http://www.siemens.com/innovationnews

More articles from Power and Electrical Engineering:

nachricht Researchers use light to remotely control curvature of plastics
23.03.2017 | North Carolina State University

nachricht TU Graz researchers show that enzyme function inhibits battery ageing
21.03.2017 | Technische Universität Graz

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Northern oceans pumped CO2 into the atmosphere

27.03.2017 | Earth Sciences

Fingerprint' technique spots frog populations at risk from pollution

27.03.2017 | Life Sciences

Big data approach to predict protein structure

27.03.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>