Calculate the Dynamic Discharge Head of a Pump

What is the dynamic discharge head?

The dynamic discharge head is 1.124 m, representing the energy or pressure head of the liquid at the pump discharge.

Understanding Dynamic Discharge Head Calculation

The dynamic discharge head refers to the energy or pressure head of the liquid at the pump discharge. To calculate the dynamic discharge head, we need to consider the elevation head, velocity head, and the friction losses in the suction and discharge lines. Elevation Head Calculation: The difference in elevation between the pump discharge and the liquid level is 1.8 m. Velocity Head Calculation: The liquid velocity is given as 3.8 m/s at the pump discharge, and the velocity head is calculated as (velocity squared) divided by (2 times acceleration due to gravity). So, the velocity head is (3.8^2) / (2 * 9.8) = 0.734 m. Total Friction Loss Calculation: The friction loss in the suction line is given as 0.3 m, and the friction loss in the discharge line is given as 1.1 m. Dynamic Discharge Head Calculation: To find the dynamic discharge head, we add the elevation head, velocity head, and subtract the total friction loss. Therefore, the dynamic discharge head is 1.8 m + 0.734 m - (0.3 m + 1.1 m) = 1.124 m. In conclusion, the dynamic discharge head in this scenario is 1.124 m.
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