Harvesting water from air with less energy
July 27, 2016 Editor 0
Getting clean water to communities in parched areas of the planet remains an ongoing challenge. Recent developments that harvest water from air have been proposed as a solution. However, the technology to do so consumes a lot of energy. But based on new modeling results, scientists now report in ACS’ journalEnvironmental Science & Technology that a new system design would require less energy and produce high-quality water.
The atmosphere around us contains water vapor in amounts comparable to all the surface and underground liquid freshwater on the planet, according to an International Organization for Dew Utilization study published in 2000. However, current machines that collect water from this airy reservoir have major limitations. For example, one method uses electrical refrigeration to cool the air and condense the vapor, but that consumes 40 to 90 percent of the total system’s energy requirements. Scientists from the Technion (Israel) compared this strategy to their new design that uses a liquid desiccant to first separate the vapor from air and then cool only the vapor. Their calculations show that this approach would result in 20 to 65 percent energy savings over the standard system, depending on where the technology is applied and the sites’ climate conditions.
The authors acknowledge funding from Maccabi Carasso Ltd.
The paper’s abstract will be available on July 20 here: http://pubs.
acs. org/ doi/ abs/ 10. 1021/ acs. est. 6b01280.
The American Chemical Society is a nonprofit organization chartered by the U.S. Congress. With nearly 157,000 members, ACS is the world’s largest scientific society and a global leader in providing access to chemistry-related research through its multiple databases, peer-reviewed journals and scientific conferences. Its main offices are in Washington, D.C., and Columbus, Ohio.
To automatically receive news releases from the American Chemical Society, email@example.com.
- Rice unveils super-efficient solar-energy technology
- Dirty to drinkable
- Let there be (intelligent) light
- Turning waste into power with bacteria — and loofahs
- Hybrid storage designs for continuous operation of solar-powered LiBr–water absorption air-conditioning
- The Kiira Electric Vehicle, Proudly Ugandan!
Subscribe to our stories
- Integrated sheep improvement technologies showcased in Doyogena, Ethiopia March 16, 2017
- Good agriculture practices―low hanging fruits for Zambian farmers March 16, 2017
- Home-grown technology firms help drive eGovernment expansion in East Africa March 16, 2017
- The secret sauce of a ‘start-up nation’ March 16, 2017
- Private sector engagement is key to success on gender equity March 16, 2017