A hydro-turbine is proposed for a dam with an estimated gross head of 20.5 m and a flow rate of 4.52m³/s. The generator is to turn at 120 rpm. You are required to identify (K5) the type of turbine best suited for this dam.For estimation purposes, set turbine = 85% and other = 95%. Note that a reasonable approximation is that net head H =turbine ×other ×Gross. The electrical generator efficiency is generator = 95%.

Scenario (A): If all the flow is to go through one turbine, calculate the turbine specific speed and then select the most appropriate type of turbine for this situation.
Scenario (B): If the flow is split into 8 identical turbines, calculate the turbine-specific speed and then select the most appropriate type of turbine for this situation.