Electrical Machines
Turbine Efficiency
\eta_{turbine}\% = (P_{shaft} / P_{water}) \times 100
Variables
| ηturbine% | Turbine efficiency | % |
| Pshaft | Mechanical shaft power output | kW |
| Pwater | Hydraulic power input | kW |
Engineering Example
A turbine delivering 1700 kW shaft power from 1962 kW hydraulic input: η = 1700/1962×100 ≈ 86.6%.
Practical Site Example
Measured during commissioning tests and compared against the manufacturer's guaranteed efficiency curve.