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Rossi hydroelectric power plant

Upgrading and renovation of the Rossi hydroelectric plant. Replacement of penstocks

Rossi hydroelectric power plant

Customer: 

Impianti Astico S.r.l.

Place: 

Arsiero (VI), Italy

Year: 

2008

Description of works:

Supply and installation of:
-  no. 2 penstocks in parallel DN1000 in steel, overall lenght 400 m
-  no. 1 penstock DN 1400 in steel, lenght 90 m
-  no. 2 ultrasonic flow meters DN 1000
-  no. 4 butterfly valves with hydraulic control to protect pipes and turbines
-  roofing sheets for the open sections of the adduction channel, including support structures
-  conduit in steel and HDPE 
-  structural rehabilitation of building works and partial reconstruction of structures

Nominal characteristics

Total plant capacity: 2600 l/s
Head: 85 m
Total installed power: 2140 kVA

Numbers

120.000 kg of steel for penstocks
50 supporting elements for pipe
1500 m fiber optic cable
300 mq sheet metal roofs
1500 m conduit in steel and HDPE

Curiosity...

The renovated hydroelectric plant was designed and built in 1888 by Alessandro Rossi, to produce the electricity needed for the operation of the same name paper mill. After more than 100 years of service, the old studded penstocks were no longer able to fulfill the intended task.
The construction site, which lasted just under a year, despite the heavy conditions of intervention, saw activities developed simultaneously for all the 1500 meters on the pipelines and the adduction channel and the use of n. 3 tower cranes with a 60 m boom, able to cover the entire work area on the pressure pipes, along the slope of the mountain (with inclines of 35-40%) and inside a tunnel length 1000 meters.
The intense commitment and coordination of the activities allowed to limit the duration of the necessary downtime for the execution of the main works within just 300 days.
The intervention on the pipelines allowed to feed well 3 alternator turbine groups of 1350, 550 and 240 kVA.
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