Reconsider Prob. 6.77 as an exercise in turbine selection. Select an impeller size and rotational speed from the Francis turbine family of Fig. 11.21d which will deliver maximum power generated by the turbine. Calculate the water turbine power output and remark on the practicality of your design.

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Li-10 m, di-6 cm 20 m L2 30 m, d,-4crm Turbine