Scientists claim gravity batteries in abandoned mines might power the world

Using derelict mines to store renewable energy and create employment.
The International Institute for Applied Systems Analysis (IIASA) is proposing a solution to the storage challenge of renewable energy sources such as wind and solar power: using abandoned mines to install gravity batteries.
Gravity batteries are a new technology that stores excess energy in heavy objects, such as water or sand, by lifting them with energy and then lowering them to spin a turbine and convert kinetic energy from gravity.
Unlike traditional batteries, the sand used in gravity batteries does not self-discharge.
The IIASA suggests that abandoned mines could be an ideal location for gravity batteries because millions of them exist worldwide and can be transformed affordably.
Most abandoned mines are already connected to the power grid and have the necessary infrastructure in place.
Additionally, converting old mines into gravity battery storage facilities could create jobs.
The IIASA estimates that the cost of their technology would be around $1-10 per kilowatt-hour and $2,000 per power capacity.
With this investment, the technology could have a worldwide potential of 7-70 terawatt-hours.
To put that into perspective, global energy usage in 2020 was 24,901.4 terawatt-hours, or 68 terawatt-hours per day, according to the International Energy Association.
IIASA's proposal to use abandoned mines as locations for gravity batteries is a cost-effective and job-creating solution to the storage challenge of renewable energy sources.
With the potential to provide a significant portion of the world's daily power, the technology is worth considering for future energy storage solutions.
Furthermore, this technology could help to reduce the environmental impact of traditional energy storage solutions. Traditional batteries, such as lithium-ion batteries, have a limited lifespan and can be difficult to recycle.
They also require the mining and processing of rare earth minerals, which can be harmful to the environment.
In contrast, gravity batteries use relatively abundant materials, such as sand, and have a much longer lifespan.
This means that they could be a more sustainable and environmentally-friendly option for energy storage.
Another advantage of gravity batteries is that they can be scaled up or down as needed.
This means that they could be used for small-scale energy storage in remote communities, or for large-scale energy storage for entire cities or even countries.
Additionally, because gravity batteries use simple mechanical systems, they are less prone to failure and require less maintenance than traditional batteries.
In conclusion, gravity batteries have the potential to revolutionize the way that renewable energy is stored and used. By using abandoned mines as locations for these batteries, we can not only store renewable energy more effectively, but also create jobs and reduce the environmental impact of traditional energy storage solutions.
It's a win-win solution that should be further explored.

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