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29/07/2026

1.Calculate whater tank capacity in cubic feet(cft)?
2. calculate water tank capacity in litre(L)?

Given
h=height = 4ft
d=diameter =3ft
ቨ=3.14

29/07/2026

Total Pump Head (TDH) Calculation – Open Tank Pumping System

Total Dynamic Head (TDH) is the total energy a pump must provide to move water from one open tank to another. It includes the static elevation difference, velocity head, pipe friction losses, and minor losses caused by fittings such as elbows, valves, pipe entrances, and exits.

TDH Formula: TDH = Hstatic + Hvelocity + Hfriction + Hminor

Example from the diagram:

Static Elevation Head = 12.0 m

Velocity Head = 0.20 m

Pipe Friction Loss = 3.5 m

Minor Losses = 1.3 m

Total Dynamic Head (TDH) = 17.0 m

Accurate TDH calculation is essential for selecting the correct pump, reducing energy consumption, improving system efficiency, and ensuring reliable water delivery. Underestimating TDH can result in poor pump performance, while overestimating it can increase installation and operating costs.

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