Hydro-pumped storage of Trani Rachi, Greece

Reservoir of Ilarionas at Aliakmonas river, Greece

ALIAKMONAS 2

06/2025

Upper Reservoir Capacity V = 1,8 x 10⁶ m³
Headrace Tunnel D = 4.300 mm, L ~ 1.650 m
Penstock Shafts:
- upper shaft D = 4.300 mm, H = 177 m
- lower shaft D = 4.300 mm, H = 438 m
High Pressure Tunnels:
- D = 4.300 mm, L ~ 26 m
- D = 3.000 mm, L ~ 212 m
- D = 2.300 mm, L ~ 104 m
Tailrace Tunnel D = 6.500 mm, L ~ 1.160 m
Geometrical Height H = 835 m
Norminal Discharge :
- 2 x 41,67 = 83,33 m³/s in turbine operation
- 2 x 29,41 = 58,82 m³/s in pump operation
Lower Reservoir Capacity V = 1,8 x 10⁶ m³
Underground Power Station with 2 sets of turbine & multistage pump
Power :
- 2 x 293 = 586 MW in turbine operation
- 2 x 289 = 578 MW in pump operation

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