Upgrading of Hydropower Plant Handeck 2

The hydropower plant Handeck 2 is more than 60 years old and upgraded as part of the investment program “KWOplus”. With this new facility the water from the Räterichsboden reservoir can be used more efficiently.

Parallel to the existing penstock, a new pressure tunnel was bored from Räterichsboden to the surge chamber Handeckfluh, from where an inclined pressure shaft leads to the new cavern Handeck 2A. The added cross-section reduces hydraulic friction in the system, while the additional 90 MW Pelton turbine offers additional power generation capacity and operational flexibility.

Dati principali

  • connection to the existing intake struct¬ure at Räterichsboden reservoir
  • pressure gallery L = 3,356 m, hydraulic diameter Dh = 4.5 m
  • valve chamber Gerstenegg L x B x H = 9 m x 12.5 m x 9.5 m
  • surge chamber Handeckfluh L x B x H = 19 m x 10 m x 13 m
  • pressure shaft L = 744 m, inner diameter D = 2.4 m
  • cavern Handeck 2A of B x L x H = 18 m x 44 m x 31 m
  • increased power capacity from 132 MW to 222 MW
  • connection to the existing tailrace tunnel
  • several access galleries of 6 km length in total

Committente

Kraftwerke Oberhasli AG (KWO), Innertkirchen / Canton Berne

Progettazione

IUB Engineering AG

Periodo di costruzione

2013–2016

Costi dell'opera

65 mio. CHF (civil & hydraulic steel works)

Prestazioni

Preliminary studies, detail design, tender documents and execution design.