Quantcast
Popular
Photo credit: RAG-AG

Germany Converts Coal Mine Into Giant Battery Storage for Surplus Solar and Wind Power

Germany is embarking on an innovative project to turn a hard coal mine into a giant battery that can store surplus solar and wind energy and release it when supplies are lean.


The Prosper-Haniel coal mine in the German state of North-Rhine Westphalia will be converted into a 200 megawatt pumped-storage hydroelectric reservoir that acts like a giant battery. The capacity is enough to power more than 400,000 homes, Governor Hannelore Kraft said, according to Bloomberg.

Pumped storage planUniversity of Duisburg-Essen

Founded in 1863, the Prosper-Haniel coal mine produces 3,000,000t/y of coal and is one of the few active coal mines remaining in Germany. But the mine is slated for closure in 2018, when federal subsidies for the industry dry up.

Kraft said that the miners in the town of Bottrop will remain employed at the site as it converts to its new function.

Pumped-storage facilities are not a new idea, as such systems are already in operation around the world. However, this is the first time that a coal mine will be used as part of the infrastructure.

Engadget explained how such a facility would work:

Similar to a standard hydroelectric power plant, pumped hydroelectric storage stations generate power by releasing water from a reservoir through a turbine to a second reservoir at a lower altitude. Rather than releasing the outflow, however, the water is then stored in the lower reservoira until it can be pumped back up to the top reservoir using cheaper, off-peak power or another renewable energy source. In the case of the Prosper-Haniel plant, the lower reservoir will be made up of more than 16 miles of mine shafts that reach up to 4,000 feet (1,200 meters) deep. The station's 200 megawatts of hydroelectric power would fit into a mix of biomass, solar and wind power. It's not a perpetual motion machine, but the water stored in the surface reservoir will effectively act as as backup "battery" that could kick in and fill any gaps in the energy mix whenever the other sources fall short.

Germany's ambitious "Energiewende," or energy transition, aims for at least an 80 percent share of renewables by 2050, with intermediate targets of 35 to 40 percent share by 2025 and 55 to 60 percent by 2035.

The country is well on track, as renewables supplied nearly 33 percent of German electricity in 2015, according to Agora Energiewende.

Germany has such an impressive renewable energy mix that last year, on a particularly windy and sunny day, so much power was generated that people were paid to use it.

And while that's good news for the environment and German consumers alike, renewable energy has a well known storage problem. The electricity produced by, say, wind turbines or solar panels must be used or else it's lost. On the flip side, renewables might not be able to meet demand on cloudy days with no wind.

Batteries, working as pumped-storage facilities, are a promising solution to this problem, since they store excess renewable energy on productive days and discharge it during energy shortfalls.

"We have a very sympathetic ear" to sustainable and cost-effective storage, Governor Kraft said in a March 14 speech in Dusseldorf.

More mines could be converted into industrial-scale storage facilities as North-Rhine Westphalia seeks to double the share of renewables in its power mix to 30 percent by 2025, Kraft said.

Learn more about Germany's transition from coal here:

Show Comments ()

EcoWatch Daily Newsletter

Sponsored
Insights/Opinion
Colorful, fresh organic vegetables. fcafotodigital / Getty Images

A New Diet for the Planet

By Tim Radford

An international panel of health scientists and climate researchers has prescribed a new diet for the planet: more vegetables, less meat, fresh fruit, whole grains and pulses, give up sugar, waste less and keep counting the calories.

And if 200 nations accept the diagnosis and follow doctor's orders, tomorrow's farmers may be able to feed 10 billion people comfortably by 2050, help contain climate change, and prevent 11 million premature deaths per year.

Keep reading... Show less
Politics
Children's books about the environment. U.S. Air Force photo / Karen Abeyasekere

This State Might Require Public Schools to Teach Climate Change

Reading, writing, arithmetic ... and climate science. That doesn't have the same ring as the "three Rs" of education, but Connecticut could one day require the subject to be on the curriculum, The Associated Press reported.

A Connecticut state lawmaker is pushing a bill to mandate the teaching of climate change in public schools throughout the state, starting in elementary school.

Keep reading... Show less
Climate
NASA's ICESCAPE mission investigates the changing conditions in the Arctic. NASA / Kathryn Hansen

These Eye-Opening Memes Show the Real 10-Year Challenge

Before-and-after photos of your friends have probably taken over your Facebook and Instagram feeds, but environmentalists are using the #10YearChallenge to insert a dose of truth.

Memes of shrinking glaciers, emaciated polar bears and coral bleaching certainly subvert the feel-good viral sensation, but these jarring images really show our planet in a worrying state of flux.

Keep reading... Show less
Popular
Vial containing swab from a deceased duck, collected for testing during the 2014-2015 avian influenza outbreak. © 2015 Erica Cirino, used with permission.

Could Trump’s Government Shutdown Cause Outbreaks of Wildlife Disease?

By Erica Cirino

The current U.S. government shutdown could worsen ongoing wildlife disease outbreaks or even delay responses to new epidemics, according to federal insiders and outside experts who work with federal wildlife employees.

Keep reading... Show less
Sponsored
Health
Vegan raw cheese from cashew nuts. byheaven/ iStock / Getty Images

Vegan Cheese: What’s the Best Dairy-Free Option?

By Ansley Hill, RD, LD

Cheese is one of the most beloved dairy products across the globe. In the U.S. alone, each person consumes more than 38 pounds (17 kg) of cheese per year, on average (1).

Keep reading... Show less
Insights/Opinion
Sun setting behind the Fawley Oil Refinery in Fawley, England. Clive G' / CC BY-ND 2.0

Even Davos Elite Warns Humanity Is 'Sleepwalking Into Catastrophe'

By Jessica Corbett

Ahead of the World Economic Forum's (WEF) annual meeting in Davos, Switzerland next week—which convenes the world's wealthiest and most powerful for a summit that's been called both the "money Oscars" and a "threat to democracy"—the group published a report declaring, "Of all risks, it is in relation to the environment that the world is most clearly sleepwalking into catastrophe."

Keep reading... Show less
Sponsored
Energy
Robusta coffee beans growing on a tree. Dag Sundberg / Getty Images

60% of Wild Coffee Species at Risk for Extinction

If humans don't wake up now to the threats posed by climate change and habitat loss, we may be in for a permanently sleepy future. A study led by scientists from the Royal Botanic Gardens, Kew found that 60 percent of wild coffee species are at risk for extinction.

Keep reading... Show less
Politics
Andrew Wheeler testifies Wednesday at a Senate confirmation hearing on his nomination to officially head the EPA. Chip Somodevilla / Getty Images

Acting EPA Head Wheeler Downplays Climate Crisis at Confirmation Hearing

Acting U.S. Environmental Protection Agency (EPA) Administrator and former coal lobbyist Andrew Wheeler downplayed the threat of climate change and defended his deregulatory record at the first Senate confirmation hearing on his nomination to officially run the agency Wednesday. It was a hearing that some activists and Democrats did not even think should take place, given that business as usual at the EPA has been hampered by the ongoing government shutdown.

Keep reading... Show less
Sponsored

mail-copy

The best of EcoWatch, right in your inbox. Sign up for our email newsletter!