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Studio Pietrangeli

United Kingdom, Scotland

Cruachan 2

Pumped Storage Hydro Project

United Kingdom, Scotland

Cruachan 2

Cruachan 2 pumped-storage hydroelectric project (IP = 600 MW) foresees the development of a new underground power station adjacent to the existing 440 MW Cruachan I, which is one of the four operational PSH facilities in the UK. The plant will use the head between the existing reservoir on the Ben Cruachan massif and lower Loch Awe.

United Kingdom, Scotland

PLACE

Drax Cruachan Expansion LTD

CLIENT

2023 - in progress

YEAR

Main Features

  • Existing upper reservoir (V = 11.4 Mm3), through dam (concrete buttress type, H = 46 m, L = 320 m), constructed in the 1960’s
  • Natural lower reservoir (Loch Awe)
  • Waterways:
    – Upper intake (Q = 205 m3/s) through a lake tap from the existing reservoir
    – headrace tunnel (7 x 7 m, D-shaped, L = 0.25 km) and upper surge shaft
    – high pressure vertical shaft (D =7 m, H = 360 m), pressure tunnel and manifolds
    – tailrace tunnel (8 x 8 m D-shaped, L = 1.1 km)
    – D/S surge shaft (D = 12 m, H = 84 m)
    – Lower intake on Loch Awe
  • Main access tunnel (L = 1.45 km)
  • Powerhouse cavern (21 x 48 x 140 m, hosting No. 4 reversible pump-turbines, IP = 600 MW)
  • Transformer cavern (17 x 42 x 141 m, hosting No. 4 transformers, 16 kV to 275 kV)
  • HV Insulated cables (L=1km, V=275kV) and extension of existing 275kV Dalmally substation

United Kingdom, Scotland

Cruachan 2

Engineering
Services

Review and upgrade of the existing design

Tender documents for E&M and EPC/FEED contracts

Assistance during procurement

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