Avče Pumped Storage Plant

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Coordinates: 46°5′1.89″N 13°39′59.94″E / 46.0838583°N 13.6666500°E / 46.0838583; 13.6666500 Avče Pumped Storage Plant (Slovene: Črpalna Hidroelektrarna Avče or ČHE Avče for short) is a pumped storage power plant near the village of Avče in West Slovenia. The powerplant was built till June 2009 and was put to the commercial use in April 2010.[1] The main building contractor was Primorje Ajdovščina. The powerplant has been the first of its kind in Slovenia.[2]

It pumps water from a height of 105 m above sea level near the village of Avče to a height of 625 meters. The accumulation lake is close to the village of Kanalski vrh, it holds a little over 2 million cubic meters of water. The generator generates 185 MW when producing electricity and uses 180 MW when pumping water. The same turbine is used for pumping and generating electricity. [3]

The efficiency of the process is 77%, which means it is profitable to operate when electricity generated costs 30% more. The lake has a capacity to operate for 15 hours at full power, discharge rate is around 40 cubic meter per second. Normally it will operate from 6 to maximum 10 hours, usually filling the lake at the end of the week.

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