MIT study investigates power generation from the meeting of river water and seawater.
Where the river meets the sea, there is the potential to harness a significant amount of renewable energy, according to a team of mechanical engineers at MIT.
The researchers evaluated an emerging method of power generation called pressure retarded osmosis (PRO), in which two streams of different salinity are mixed to produce energy. In principle, a PRO system would take in river water and seawater on either side of a semi-permeable membrane. Through osmosis, water from the less-salty stream would cross the membrane to a pre-pressurized saltier side, creating a flow that can be sent through a turbine to recover power.
The MIT team has now developed a model to evaluate the performance and optimal dimensions of large PRO systems. In general, the researchers found that the larger a system’s membrane, the more power can be produced — but only up to a point. Interestingly, 95 percent of a system’s maximum power output can be generated using only half or less of the maximum membrane area.
Leonardo Banchik, a graduate student in MIT’s Department of Mechanical Engineering, says reducing the size of the membrane needed to generate power would, in turn, lower much of the upfront cost of building a PRO plant.
“People have been trying to figure out whether these systems would be viable at the intersection between the river and the sea,” Banchik says. “You can save money if you identify the membrane area beyond which there are rapidly diminishing returns.”
Banchik and his colleagues were also able to estimate the maximum amount of power produced, given the salt concentrations of two streams: The greater the ratio of salinities, the more power can be generated. For example, they found that a mix of brine, a byproduct of desalination, and treated wastewater can produce twice as much power as a combination of seawater and river water.
The Latest on: Electricity generation
via Google News
The Latest on: Electricity generation
- Fracking trailblazer Chesapeake Energy files for bankruptcyon June 28, 2020 at 1:23 pm
Chesapeake Energy Corp. said Sunday that it had filed for bankruptcy protection as an oil- and gas-price rout stoked by the coronavirus pandemic proved to be the final blow for a shale-drilling ...
- Colorado Springs Utilities commits to closing coal-fired generation at Drake Power Planton June 26, 2020 at 1:30 pm
Colorado Springs Utilities gave its commitment Friday to closing the coal-fired portions of Martin Drake Power Plant by 2023 and investing significantly more in renewable energy in coming decades.
- Fluence Unveils Sixth-Generation Energy Storage Technology Stackon June 26, 2020 at 11:51 am
Fluence has already been selected by such customers as Enel, LS Power, sPower and Siemens for 800 MW, 2300 MWh, of projects using the new technology. Jun 26, 2020 Fluence, a Siemens and AES company, ...
- BMW has internal pressure to build electric-only platformon June 26, 2020 at 6:40 am
BMW is getting some internal pressure to build an electric-only platform and move away from the strategy to build cars with several different powertrain options on the same platform. In 2018, the ...
- General Electric helps increase electricity generation in Iraqon June 26, 2020 at 6:07 am
Power stations that General Electric helped develop and improved exploitation of natural gas boost Iraq's energy infrastructure as the country seeks alternatives to imported energy from Iran.
- The Solar Roof Is Dying and So Is Tesla's Energy Company Dreamon June 26, 2020 at 4:47 am
Tesla (NASDAQ: TSLA) isn't really an energy company; it's an auto manufacturer through and through. Sure, it makes batteries that are sometimes sold to utilities to store energy, but 95% of Tesla's ...
- Botswana issues maiden power generation licences to private producerson June 25, 2020 at 4:44 am
Botswana issued its first licences allowing three private companies to generate their own power which will mostly be destined for export, the energy regulator said on Thursday. The Independent Power P ...
- TVA opens pathway for local power companies to produce their own solar, CHP generationon June 23, 2020 at 11:24 am
The Tennessee Valley Authority has green-lighted a first-ever plan allowing the local distribution utilities within its service territory to develop some of their power generation, including renewable ...
- HIVE Blockchain Announces Successful Installation of Next Generation Miners at Green Energy-Powered Quebec Bitcoin Mining Facilityon June 23, 2020 at 6:59 am
CNW/ - HIVE Blockchain Technologies Ltd. (HIVE.V) (HVBTF) (HBF.F) (the "Company" or "HIVE") is pleased to announce that it has put into operation its recently acquired 1,090 Bitmain Antminer T17+ 58 T ...
- Tidal Power Generation Equipments Market Future Prospects 2026 | Tidal Energy, Atlantis Resources, Ocean Power Technologieson June 23, 2020 at 4:28 am
An extensive elaboration of the Global Tidal Power Generation Equipments market strategy of the ...
via Bing News