The plant processes 50 cubic meters of water per day, consuming only 1.5 kilowatt-hours of electricity per cubic meter. The most efficient desalination technique currently in use is reverse osmosis, which consumes more than twice as much energy. The magazine "Pictures of the Future" reports that the new technique uses an electric field to remove the salt from the water.
Plans call for demonstration units to be set up in Singapore, the U.S., and the Caribbean by mid-2012.
Experts estimate that global water consumption will rise by 40 percent over the next 15 years. Because desert countries and small nations such as Singapore have few sources of fresh water, they are increasingly desalinating seawater, which still consumes a lot of energy. Turning one cubic meter of seawater into steam takes about 10 kilowatt-hours of electricity. By contrast, reverse osmosis, which presses the water through a filter, consumes about four kilowatt-hours for the same amount of water.
The new energy-saving system from Siemens uses electrodialysis. It extracts the salts’ positively and negatively charged ions from the water by means of an electric field. Special membranes that only allow a single type of ion to pass through create channels that collect either the resulting brine or the purified water. However, the process becomes inefficient as the salt concentration declines because the water’s electrical resistance increases.
That’s why a Continuous Electrodeionization (CEDI) system is used to extract the last percentage of salt in the water. In this system, ion exchange resins located between the membranes capture the ions and transport them away from the water.
Experts from Siemens Corporate Technology are currently working on a simulation model that will help further improve the process. As part of a project sponsored by the German Research Ministry, the researchers will simulate the processes at the molecular level. They hope the model will help them to better understand the transport of the ions through the membranes as well as the dynamics of the water flow in the electric field.
Siemens developed the new desalination technique at the Singapore WaterHub, a research center for water treatment systems. The technology is part of Siemens’ Environmental Portfolio, with which the company generated about €28 billion in sales in fiscal year 2010.
Dr. Norbert Aschenbrenner | Siemens ResearchNews
Researchers take next step toward fusion energy
16.11.2017 | Texas A&M University
Desert solar to fuel centuries of air travel
16.11.2017 | SolarPACES
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...
Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
17.11.2017 | Physics and Astronomy
17.11.2017 | Health and Medicine
17.11.2017 | Studies and Analyses