Profile image
By Alton Parrish (Reporter)
Contributor profile | More stories
Story Views
Now:
Last Hour:
Last 24 Hours:
Total:

Replacing Coal with Gas or Renewables Saves Billions of Gallons of Water

% of readers think this story is Fact. Add your two cents.


The ongoing transition from coal to natural gas and renewables in the U.S. electricity sector is dramatically reducing the industry’s water use, a new Duke University study finds.

“While most attention has been focused on the climate and air quality benefits of switching from coal, this new study shows that the transition to natural gas – and even more so, to renewable energy sources – has resulted in saving billions of gallons of water,” said Avner Vengosh, professor of geochemistry and water quality at Duke’s Nicholas School of the Environment. 

Nochten brown coal open pit, in the background the corresponding Boxberg power plant; Tagebau Nochten (Vattenfall), im Hintergrund ein Braunkohlekraftwerk - brown coal- extraction & use (7789873048).jpg
Credit: gbohne / Wikimedia Commons

These savings in both water consumption and water withdrawal have come despite the intensification of water use associated with fracking and shale gas production, the new study shows.

“For every megawatt of electricity produced using natural gas instead of coal, the amount of water withdrawn from local rivers and groundwater is reduced by 10,500 gallons, the equivalent of a 100-day water supply for a typical American household,” said Andrew Kondash, a postdoctoral researcher at Duke, who led the study as part of his doctoral dissertation under Vengosh.

Water consumption – the amount of water used by a power plant and never returned to the environment – drops by 260 gallons per megawatt, he said.

At these rates of reduction, if the rise of shale gas as an energy source and the decline of coal continues through the next decade, by 2030 about 483 billion cubic meters of water will be saved each year, the Duke study predicts.

If all coal-fired power plants are converted to natural gas, the annual water savings will reach 12,250 billion gallons – that’s 260% of current annual U.S. industrial water use.

Although the magnitude of water use for coal mining and fracking is similar, cooling systems in natural gas power plants use much less water in general than those in coal plants. That can quickly add up to substantial savings, since 40% of all water use in the United States currently goes to cooling thermoelectric plants, Vengosh noted.

“The amount of water used for cooling thermoelectric plants eclipses all its other uses in the electricity sector, including for coal mining, coal washing, ore and gas transportation, drilling and fracking,” he said.

Even further savings could be realized by switching to solar or wind energy. The new study shows that the water intensity of these renewable energy sources, as measured by water use per kilowatt of electricity, is only 1% to 2% of coal or natural gas’s water intensity.

“Switching to solar or wind energy would eliminate much of the water withdrawals and water consumption for electricity generation in the U.S.,” Vengosh said.

Natural gas overtook coal as the primary fossil fuel for electricity generation in the United States in 2015, mainly due to the rise of unconventional shale gas exploration. In 2018, 35.1% of U.S. electricity came from natural gas, while 27.4% came from coal, 6.5% came from wind energy, and 2.3% came from solar energy, according to the U.S. Energy Information Administration (EIA).

Dalia Patiño-Echeverri, Gendell Associate Professor of Energy Systems at Duke’s Nicholas School, co-authored the study with Kondash and Vengosh.

They published their peer-reviewed paper Oct. 14 in the open access journal Environmental Research Letters.

Funding for the study came from a National Science Foundation grant (#EAR-1441497) and the Duke University Energy Initiative.

Contacts and sources:

Tim Lucas
Duke University

Citation: Quantification of the water-use reduction associated with the transition from coal to natural gas in the U.S. electricity sector. Andrew J Kondash, Dalia Patino-Echeverri, Avner Vengosh. Environmental Research Letters, 2019; DOI: 10.1088/1748-9326/ab4d71



Source: http://www.ineffableisland.com/2019/10/replacing-coal-with-gas-or-renewables.html
Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world.

Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.

"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.

Support BeforeitsNews by trying our natural health products! Join our affiliate program
Order by Phone at 888-809-8385 or online at
www.mitocopper.com


Get our Free Ebook, "Suppressed Health Secrets"  with  Natural Cures THEY don't want you to know!

APeX - Far superior to colloidal silver! Destroys Viruses, Bacteria, Pathogens with Oxygen plus Silver!

Supreme Fulvic - Nature's most important supplement! Vivid Dreams again!

Ultimate Curcumin - Natural pain relief, reduce inflammation and so much more.

MitoCopper - Bioavailable Copper destroys pathogens and gives you more energy. (See Blood Video)
Oxy Powder - Natural Colon Cleanser!  Cleans out toxic buildup with oxygen! 
Organic Hemp Extract (CBD) - Full Spectrum high CBD (3300mg) hemp extract eases stiff joints, relieves stress and more!
Nascent Iodine - Promotes detoxification, mental focus and thyroid health.
Smart Meter Cover -  Reduces Smart Meter radiation by 96%!  (See Video)


FINAL WARNING!  Diseases are EXPLODING!  Watch this Video about APeX and You'll THROW AWAY Your Colloidal Silver!  APeX destroys Viruses, Bacteria and other Pathogens with the power of Oxygen PLUS Silver!  Nobody else has a product like THIS!   See why the inventor hasn't been sick in 16 years and why you'll never hear about it on the FAKE NEWS!  Get some now and tell your friends about it too so we can reach more people!  


APeX Interview - Superior to Colloidal Silver from Lee Canady on Vimeo.


Learn about APeX Here and Get the 50 Page Report in PDF format.   Call us at 888-809-8385 to order by phone.



Report abuse
Loading...
Loading...

Comments

Your Comments
Question   Razz  Sad   Evil  Exclaim  Smile  Redface  Biggrin  Surprised  Eek   Confused   Cool  LOL   Mad   Twisted  Rolleyes   Wink  Idea  Arrow  Neutral  Cry   Mr. Green

Total 1 comment
  • 2QIK4U

    Not when you combine coal with hydroelectric plants

MOST RECENT
Loading...
Load more ...

SignUp

Login

Newsletter

Email this story
Email this story

If you really want to ban this commenter, please write down the reason:

If you really want to disable all recommended stories, click on OK button. After that, you will be redirect to your options page.