Hydro-pumped storage at Velventos, Prefecture of Kozani, Greece

Hydro-pumped storage at Velventos, Prefecture of Kozani, Greece

SITE

Reservoir of Polifito, Aliakmonas river, Greece

PROJECT OWNER

GREEN INVESTMENTS

YEAR

05/2025

DESCRIPTION

• Reconnaissance study
• Preliminary design study

TECHNICAL CHARACTERISTICS

• Upper Reservoir Capacity V = 1 x 10⁶ m³
• Water conveyance (from upper reservoir to station):
  • Penstock shaft D = 3.200 mm, L~805 m
  • Headrace tunnel D = 3.200 mm, μήκους L~200 m
• Tailrace tunnel (from station to lower reservoir) D = 4.800 mm, L~1750 m
• Geometrical Height H = 831 m
• Norminal Discharge:
  • 2 x 23,15 = 46,30 m³/s in turbine operation
  • 2 x 16,34 = 32,68 m³/s in pump operation
• Lower Reservoir Capacity V = 1 x 10⁶ m³
• Underground Power Station with 2 sets of turbine & multistage pump
• Access tunnel to the station with vaulted cross-section, Β~12,00 m, L~1.600 m
• Power:
  • 2 x 162 = 324 MW in turbine operation
  • 2 x 155 = 310 MW in pump operation