Danes innovate with energy project

According to TecMundo, Danish engineers are planning an innovative project that could be a great solution to the problem of waste in the generation of clean energy. The novelty, which is called topographic battery, consists of storing energy in underground balloons.

The plan would be to build huge water balloons that will be buried underground, whose testing facility will be 100 m². The researchers' idea would be to use the excess energy produced to pump water from a reservoir to a giant membrane (the water balloon), which will be under the ground, under a strategically calculated amount of weight. 

This way, while the water balloon is being filled, the pressure will raise the soil deposited just above. When energy reuse is necessary, a valve will be opened, allowing water to be expelled by the force of gravity exerted by the weight of the soil above the balloon. The water will pass through an electricity generating turbine and return to the initial reservoir.

For professor Kenny Sorensen, from the University of Aarhus, the project would be ideal since it would help to store energy correctly, since they already need to donate. 

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