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Transforming skyscrapers into gravity batteries

9/1/2022

 
Gravitational accumulation is no longer a novelty. Since 2012, the so-called “gravity batteries” have made their official debut in the world of energy storage. And today more than one company has demonstrated its potential thanks to full-scale projects that exploit mineral wells, quarries or mountains. But researchers at the International Institute for Applied Systems Analysis (IIASA) in Vienna, Austria, want to take technology to another level. Or, better, in another environment: that densely urbanized metropolis. In a new study published in the journal Energy, scientists proposed to transform skyscrapers into gigantic gravity battery. How? Through their Lift Energy Storage System, a system that would exploit lift systems and empty apartments to store energy in very high buildings. The idea is to accumulate energy by lifting containers of wet sand or other high-density materials. Basically, the LEST would benefit from any downtime of the lift, moving the sand from the bottom of the building upwards, in case of an excess of electricity production on the grid. And from top to bottom to release energy when electricity demand rises. - SEN

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