Jul. 25, 2017
The main functions of a surge tank are:
It reduces the amplitude of pressure fluctuations by reflecting the incoming pressure waves
It improves the regulation characteristic of a hydraulic turbine.
The surge tank dimensions and location are based on the following considerations
The surge tank should be located as close to the power or pumping plant as possible;
The surge tank should be of sufficient height to prevent overflow for all conditions of operation;
The bottom of surge tank should be low enough that during its operation the tank is drained out and admit air into the turbine penstock or pumping discharge line; and
The surge tank must have sufficient cross sectional area to ensure stability.