Canyon Hydro M300 Pico, Installation Operation & Maintenance

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3.4 Component Details
3.4.1 M300-30 & M300-60 Turbine-Generator Assemblies
Both the M300-30 and M300-60 Turbines are reaction style hydro turbines.
Reaction style turbines develop torque by reacting to a fuild’s pressure.
The amount of torque generated by a reaction style turbine is proportional to
the pressure differential across it. The power generated by the turbine is a result
of both the torque generated and the shaft speed.
In a water network application the pressure differential across the turbine is set
by the PRV in parallel with the system. The PRV’s upstream and downstream
pressure settings will dictate those of the turbine.
The pressure differential across the turbine determines the maximum power
output of the turbine as well as the flow rate through the turbine.
Both the M300-30 and M300-60 Turbines have a maximum rated output of
300-watts even though they operate across different pressure ranges. The M300-
30 Turbine operates at lower pressure and passes more flow. The M300-60 Turbine
operates at a higher pressure differential and requires less flow. This is reflected in
the turbine performance charts located in the appendix.
Choosing the correct turbine for a particular application is done by evaluating
the available net pressure differential (upstream pressure - downstream
pressure). It is also important to consider the turbine’s required flow rate to
ensure adequate flow is available.
The maximum pressure differential across each of the turbines must be within
their rated limits. Exceeding the rated pressure differentials can cause the
turbines to over power the generator, damaging it.
CAUTION: Over powering the turbine-generator will result in permanent
damage to the equipment and must be avoided.
For applications in excess of each turbine’s rated operating range it is possible
to install a small pressure reducing valve in line with the turbine-generator,
limiting the incoming pressure to the turbine. Consult the in line PRV diagrams in
the appendix for further details.
For applications where flows drop below the turbine’s rated flow or where flows
diminish completely a small pressure reducing valve can be placed after the
system to maintain downstream pressure. Consult the in line PRV diagrams in the
appendix for further details.