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
Perovskite-silicon solar cell research collaboration hits 25.2% efficiency
15.06.2018 | Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
Second heat source optimises heat pump system
12.06.2018 | FIZ Karlsruhe – Leibniz-Institut für Informationsinfrastruktur GmbH
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
Light detection and control lies at the heart of many modern device applications, such as smartphone cameras. Using graphene as a light-sensitive material for...
Water molecules exist in two different forms with almost identical physical properties. For the first time, researchers have succeeded in separating the two forms to show that they can exhibit different chemical reactivities. These results were reported by researchers from the University of Basel and their colleagues in Hamburg in the scientific journal Nature Communications.
From a chemical perspective, water is a molecule in which a single oxygen atom is linked to two hydrogen atoms. It is less well known that water exists in two...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
15.06.2018 | Materials Sciences
15.06.2018 | Ecology, The Environment and Conservation
15.06.2018 | Power and Electrical Engineering