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Sunday, November 28, 2010

Energy Storage - Pumped Storage Hydro

Q: How to store the energy?
A: In its potential form...

When electricity is produced from an hydro electric plant, during off-peak hours of demand, the produced electricity can be used to pump the water to a higher reservoir using a reversible turbine/generator assembly.

The non-conventional "wind turbines" or "solar cells" can also be used to pump the water to a higher reservoir, thereby making the electricity production from them more reliable to connect the generated energy to the electricity Grid!

Once the water is available in higher reservoir, electricity can be generated as and when needed depending on the demand.

This is the largest capacity form of stored (potential) energy available for a Grid Connected storage.

In India we have one 1000MW plant at Tehri Dam.

In my personal opinion, this is one of the best and environmental friendly solution to store the electricity!
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