1. Uni Flow Energy Extraction generator
for extraction of flow energy
from small rivers

2. units may be floated into place using buoyancy chambers and/or airbags
buoyancy chambers are filled with sand or gravel ballast when each unit is installed
river flow
the water level rises in
each entrance channel
as the flow slows down
the water level falls in
each exit chamber
three prefabricated Uniflow channel units placed side by side in a river
© clf anderson
diagram only
not to scale
units may be floated into place using buoyancy chambers and/or airbags
each prefabricated unit rests on the riverbed and may be piled into place

3. Uniflow channel unit plan view
side wall of exit channel
side wall of entrance ramp
exit
flow
entrance flow
turbine
runner
duct
turbine
runner
Uniflow channel unit plan view
© clf anderson
diagram only
not to scale

4. Uniflow generator unit
generator and thrust bearing are
installed above the maximum
river flood level
supports are adjustable
so as to allow accurate levelling
of the power unit to accommodate
the slope of the river bed
dimensions and type
of turbine runner vary
according to water
depth and flow rate
flood water can spill
over the top of the unit
drive shaft
guide tube
trash
screen
river flow direction
turbine runner
note: inlet slope is exaggerated
a venturi system may be used to apply a vacuum to the base to compact the river bed
river bed level
© clf anderson
diagram only not to scale
Uniflow generator unit

5. alternative river generator unit
generator and thrust bearing are
installed above the maximum
river flood level
prefabricated
entrance channel
spun concrete pipe
waterfall profile
spun concrete pipe
exit chamber fixed to the river bed
river bed level
© clf anderson
diagram only
not to scale
alternative river generator unit

6. a Deriaz turbine runner with the blades closed
© clf anderson
a Deriaz turbine runner with the blades closed
Kaplan runners have a similar layout
an Archimedian screw may be used on many sites