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| Twin 220 kV lines crossing the mountains from Turlough Hill hydro station. © Eugene Brennan |
One of my cycles back in mid-August (the long days of summer seem to be a distant memory now) was from Kilcullen to within a few miles of Turlough
Hill. This is the location of Ireland's only pumped storage power
station. When there's a surplus of power which the grid can't use, pumps
at the station send water to an artificial lake located on top of the
mountain. Once there's a demand for power, the motors and pumps switch function and
become turbines and generators, the turbines driven by water as it rushes down through
penstocks (large pipes) to a natural lake, located at the base of the
mountain. Turlough Hill power station is net inefficient (power out is
less than power in due to losses in the system).





