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Thursday, 3 September 2020

GRAVITRICITY


A new prototype gravity-based energy storage system is in the works, promising to store energy at half the price of current market-leading lithium-ion (Li-ion) batteries — with tests beginning next spring, in Scotland, according to the company website.

Based in Edinburgh, Gravitricity's concept is to raise weights of roughly 13,227 tons (12,000 tonnes) up into a lattice tower, and then release them into a deep shaft — releasing and discharging potential energy according to how much is needed.

A Dutch winch specialist Huisman, along with a UK engineering firm Kelvin Power, is building the 250 kW version of the concept — as part of a $1.3-million (£1 million) project, reports Recharge News.

"Our demonstrator will use two 25-tonnes [27.55-U.S.-ton] weights suspended by steel cables. In one test we'll drop the weights together to generate full power and verify our speed of response. We calculate we can go from zero to full power in less than a second — which can be extremely valuable in the frequency response and back-up power markets," said Miles Franklin, lead engineer at Gravitricity, according to Recharge News - 
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