Gaftoi Daniel
1. VLH Turbine (Very Low Head)
Low head
Navigation dams
Hydropower unprofitable due
to very high investment
A lot of existing sites which
do not produce electricity
MJ2 Technologies VLH Turbine
Small infrastructure
Easy installation
Viable
VLH turbine - description
Integrated
generating set
Kaplan runner with 8 adjustable
blades
Fix distributor with 18 blades
Trash rack
Generator directly coupled to the
runner shaft
Automatic trash rack cleaner
Drunner : 3.15 5.00 (m)
H : 1.4 3.2 (m)
Qinst : 10 30 (mc/s)
P : 100 500 (kW)
VLH turbine - description
Mobile module it can be raised from the water in order to let the
flood to pass and for inspection/ maintenance purpose
Double regulated adjustable blades and variable speed
Water speed throw turbine smaller than 2m/s
The module can be used as a gate
Fish Friendly turbine 100% surviving
VLH Turbine example (1)
Millau France (pilot site)
Head: 2.5 m
Installed flow: 22.5 mc/s
Installed power: 410 kW
Energy: 2 GWh/ year
Runner diameter: 4.5 m
In function: March 2007
VLH Turbine example (2)
Marcinelle Belgium
(navigation dam)
Head: 3 m
Installed flow: 2 x 15 mc/s
Installed power: 650 kW
Energy: 2 GWh/year
Runner diameter: 3.55 m
instalation: Novembre 2011
Price: 1.000.000 Euros
Time needed for up/ down 20 min
VLH Turbine example (3)
Moncey France
(new site)
Head: 2.10 m
Installed flow: 2 x 12.8 mc/s
Installed power: 2 x 207 kW
Runner diameter: 3.55 m
2. Floated turbines - Rutten
Siphon turbine S (Des Grosses Battes, Liege)
Head: 3 m
Installed flow: 27,5 m3/s
Installed power: 486 kW
Energy: 2,6 GWh/year (2 years)
Runner diameter: 3,25 m (92 rot/min)
4 adjustable blades (Kaplan)
Weight turbinated water
Floated turbine 2 - Rutten
Turbine D
Power plant realized from modules
Recommended for low head navigation dams
No civil works
Without regulation ON / OFF
H: 1.80 4.00 m
Q : 10 18 mc/s
P : 120 560 kW
Downstream min level : 2.5 4 m
Fish Friendly
Floated turbine 2 Rutten
Turbina D (Hun - HauteMeuse) - testing
Power plant realized from 6 modules
Head: 2.8 m
Installed flow: 6 x 17 m3/s
Installed power: 6 x 400 kW
Energy: 10 GWh/year
Investment: 6 mil Euros
Weight: 350 t
Height of the metal structure: 8 m
3. Archimedes' screw turbine
Used in ancient times as a water pump.
For the last years the screw was used as a
turbine
Fish Friendly Turbine (the screw was used for
movement of the fish from a lake to another)
Rotation speed : 28 30 (rpm)
Head : 1 10 (m)
Qinst : 0.1 15 (mc/s)
P ower: max 200 (kW)
Archimedes' screw turbine
The screw has an efficiency of 87% for low heads [ 1 10 m].
Robustness it is given by the simple working and construction principles, and also
the waste tolerance
In Europe are installed more than 200 Archimedes screws.
Thank you for your attention
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