New construction of small hydropower plant Sigirino / Switzerland

High head power plant at the drinking water aqueduct Crana-Origlio with reservoir, penstock and power house with access road. The reservoir collects the spring water at an altitude of 1'006.20 m a.s.l. The spring water is fed to the power house via an underground penstock DN 350/400.

Main Data

  • Reservoir at 1'006.20 m a.s.l.
  • Dimension
    • L = 10.65 m
    • B = 7.50 m
  • Penstock cast iron
    • Ø = DN 350/400
    • LTot = 1'723 m
  • Power house 520 m a.s.l.
    • QA = 0.2 m3/s
    • HN = 475.50 m
    • PA = 0.8 MW
  • Horizontal Pelton turbine, 2 nozzles
    • PN = 0.84 MW
    • QN = 0.20 m3/s
    • n = 1000 U/min
  • Synchronous generator
    • S = 1.0 MVA
    • n = 1000 U/min
  • Transformer
    • PTR = 1.25 MVA

Client

Aziende Industriali di Lugano (AIL) SA

Consultant

IM Maggia Engineering Ltd, Locarno

Construction period

2012–2015

Construction costs

CHF 7.8 Mio.

Scope of services

Preliminary design, final design, tendering, construction design, construction supervision, commissioning.