Small hydro power plant of Moutier "Tunnel du Graitery" |
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| Object |
Low head small power plant |
| Location |
Moutier, Switzerland |
| Water streams |
Tunnel water |
| Owners |
Turbinor SA, Sonceboz (CH) and Bleue-Verte SA, Moutier (CH). Joint venture culnu with 50/50% shares |
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| Project status: |
Project completed |
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| Concept: |
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| Intake |
Including a small water storage basin with a flushing gate valve, an overflow crest with a bypass, a screen with multiple holes (without automatic cleaning machine) |
| Penstock |
Penstock built in HDPE DN 355/PN10; pipe elements of 12 m each and elbows thermo-welded together or by means of using an electrical welding sleeve. Total penstock length is 293 m |
| Powerhouse |
1x Horizontal Pelton turbine with two jets, runner dia. 500 mm [HYDROHROM HHP H2]. Asynchronous generator 400 V, 75 kW, 612 rpm [Siemens] directly coupled to the turbine |
| Tailrace |
Underground metal pipe of dia. 800 mm. Installation by means of successive hammering (tube pusher) and welding together of 5 m pipe elements on a total length of 46 m |
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| Characteristics: |
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| Gross head |
56.5 m |
| Nominal turbine flow |
160 l/s |
| Nominal power |
66 kW |
| Yearly production |
235 MWh |
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| Realization: |
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| Construction start |
April 2015 |
| Commercial operation |
September 2015 |
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| Engineering office |
EnEn Sàrl, Moutier (CH) |
| Civil engineering office |
ATB SA, Moutier (CH) |
| Civil works |
F. Hänzi, Moutier (CH) |
| Construction company |
F. Hänzi, Moutier (CH) |
| Tube pusher company |
Dell'Anna Enzo SA, Moutier (CH) |
| Supplier of the penstock |
PlastiteCH, Eysins (CH) |
| Supplier of the turbine equipment |
Hydrohrom s.r.o. Bystrice (CZ) |
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