The meaning of each parameter of p=9.81qhn

The details are as follows:

P: Output unit: kW (kilowatt) The power transmitted from the unit end.

H: Head unit: m (meter) The effective head acting on the turbine, which is equal to the difference between the reservoir water level and the downstream water level (ie: gross head) minus the head loss of the water diversion part, the head loss △h , according to experience, it is generally 3% to 10% of Hg (gross head), and the smaller value is used for shorter water pipes.

Q: Flow unit: m3/s (cubic meter/second) quoted flow rate of turbine in hydropower plant.

η: The efficiency of the hydraulic generator unit, including the efficiency of the turbine and the efficiency of the generator. η is not only related to the types and parameters of the turbine and generator, but also changes with changes in the operating conditions of the unit. Not a fixed value.