Thursday, November 10, 2011

Generating Green Energy from Coal Mines.


The principle is simple. When a large amount of wind and solar energy is available, it is used to pump water out of the mine tunnels into an artificial lake on the former mine grounds. When there is an electricity shortfall or if the energy supply begins to fluctuate, the floodgates are opened and the water drops through the giant pipes to drive the turbines 1,000 meters below the surface. The entire output becomes available to the grid within a very short amount of time.


Courtesy: http://www.spiegel.de/international/business/0,1518,796399,00.html

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