Small hydro success stories

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Small hydro success stories
Luigi Papetti ESHA
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Troitorrents SHP
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Troitorrents SHP

• Set on the drinking water network of
  Troistorrents (Valais, CH) municipality
• It works on the high difference of levels between
  the catchment chamber and the surge tank, as a
  pressure regulator device
• Typical application of energy recovery in high
  mountain remote areas

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Troitorrents SHP
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Troitorrents SHP
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Troitorrents SHP

• Installed capacity 75 kW
• Net head 242 m
• Rated discharge 35 l/s
• Energy production 230.000 kWh/year

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Troitorrents SHPCosts
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The reasons of a success

• Suitable also for operation in isolated networks
• Multipurpose use of water
• No additional infrastructures needed (intake,
  waterways, etc. already existing)

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GARDONE VAL TROMPIA PLANT
Main characteristics
Plant location
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BASIC FIGURES
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Gardone V.T. in XVIII century
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Plan view of the eight plants
Intake
Bernardelli
Beretta I
Beretta III
Beretta II
Redaelli II
Redaelli I
LEGENDA
Gramineto channel
Acqualonga channel
AcqualongaGramineto channel
Redaelli III
Penstock
Powerhouse
S.F.A.E.
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Schematic profile of the plant
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Penstocks
Surge tank
Section A open channel (202,8 m)
Section B,C,D1 GRP penstock (768,4 m)
Section A siphoned channel (321,1 m)
Section D2,E steel concrete penstock (357,1 m)
Section A cast iron penstock (254,5 m)
Section E tail race (358 m)
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Weir
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The intake structures
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Headrace channel open air stretch
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Siphon intake during construction
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Cast iron pipe installation
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Glass reinforced (GRP) penstock installation
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Steel penstock
Studio Frosio
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Surge tank during site assembly
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Powerhouse - Before
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Powerhouse - After
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ECONOMICSINVESTMENT
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ECONOMICSINCOME AND OM
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ENVIRONMENTAL BENEFITS
EMISSIONS
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The reasons of a success

• Partnership between local municipality and
  private investors
• Strong commitment of the local municipality
• Good social acceptance thanks to the creation of
  the awareness in the general public of
  environmental importance of the initiative
• Strict works supervision and control both from
  technical and administrative point of view
• Creation of private-public company to manage and
  operate the plant, acting independently in the
  energy market

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THE END
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