The 900 megawatt (MW) Nant de Drance pumped retention powerfulness works successful Valais, Switzerland, came online successful July aft 14 years of challenging operation and testing. The gigantic “water battery” is susceptible of storing capable hydroelectric vigor to powerfulness arsenic galore arsenic 900,000 homes.Gigantic Swiss ‘water battery’
The Nant de Drance “water battery” has a retention capableness of 20 cardinal kWh of electricity. It volition assistance stabilize Switzerland’s and Europe’s electrical grids by some reducing the chances of a grid overload erstwhile request is high, and providing much powerfulness erstwhile it’s needed.
It took up to 650 operation workers moving connected the tract astatine once, and astir 60 companies moving unneurotic to implicit the project.
Six underground turbines are located 600 meters (1,968 feet) underground successful a cavern betwixt the Emosson and Vieux Emosson reservoirs successful Valais, confederate Switzerland.
Emosson, the little reservoir, is the second-largest reservoir successful Switzerland, and its 180-meter-high (590-feet-high) dam is the 5th tallest successful the country.
The precocious reservoir of Vieux Emosson holds 25 cardinal cubic meters of water, which represents a retention capableness of 20 cardinal kWh. It was raised by 21.5 m (70.5 feet) successful bid to treble its capacity.
Each underground turbine has a capableness of 150 MW. The turbines tin power from pumping astatine afloat powerfulness to turbining astatine afloat powerfulness successful little than 5 minutes, and it takes them little than 10 minutes to power from turbine mode to pump mode. Three 100 sixty cubic meters of h2o per 2nd passes done the turbines.
When there’s excessively overmuch energy successful the grid, h2o is pumped from the little reservoir to the higher reservoir, and the surplus vigor is stored successful the precocious reservoir.
When powerfulness is needed, h2o flows from the precocious reservoir and done the six underground turbines into the little reservoir successful bid to make electricity.
This animation illustrates however it works:
Nant de Drance SA and its shareholders Alpiq, SFR , IWB, and FMV volition inaugurate the powerfulness works successful September.
Read more: Eco Wave Power volition conception Spain’s archetypal wave-energy powerfulness plant
Photos: Nant de Drance
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