![]() Currently, India has installed about 4,746 MW of pumped-storage, according to figures from India’s Central Electricity Authority. Pumped hydropower, or even Green Gravity’s approach, may use more energy than produced but when accounting for being able to make renewable energy available at off-peak hours, can mean less reliance on coal-produced power and access to reliable power. From here, when needed, water is released downhill to move a turbine and produce electricity, like in a hydroelectric plant. The same principle underlies the so-called ‘pumped hydropower’ storage, a well-established approach where water from the ground is pumped upstream electrically into a reservoir. The depth to which the block can slip can be determined via a braking system, thus giving control on the amount of power that can be produced. When backup power is required, the heavy block will fall, under gravity, and the ensuing momentum will power a generator via a connected shaft (or rotor). Their plan is to find defunct mines, which often go hundreds or even thousands of metres deep, and haul a ‘weighted block’ - this could be as much as 40 tonnes - up to the top of the mine shaft using renewable power during the day when such power is available. ![]() While the common approach to addressing this challenge is to design them better, find more efficient conducting materials and install large battery farms to store power, Green Gravity’s idea is to rely on low-tech gravity. Charging a battery to use as a backup during this downtime hikes power prices. Government initiates process to recover residual gold from processed ore in Kolar Gold FieldsĪ hiccup that makes renewable energy unreliable, from solar or wind power, is that there is no power during nights or windless days.
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