Total static head
It consists basically of two parts:
- The pressure difference between discharge side and suction side tank. It is zero for open tanks and closed circulation systems.
- The height difference between the liquid levels of discharge side and suction side tanks respective the system inlet and outlet. It is zero for closed circulation systems.
This means for circulation systems the static head is always zero,
pin, pout = pressures on suction respectively discharge liquid levels
ρ = fluid density
g = gravity (9.81 m/s2)
Hgeo = static height difference between suction and discharge liquid levels