1. What is Pump Head Calculation?

Total Dynamic Head (TDH) is the total equivalent height that a fluid is to be pumped, taking into account friction losses in the pipe. It's a crucial parameter in pump selection and system design.

2. How Does the Calculator Work?

The calculator uses the fundamental pump head equation:

Where:

• Static Head — Vertical distance from water surface to discharge point (ft)
• Friction Loss — Head loss due to friction in pipes and fittings (ft)
• Pressure Head — Additional pressure required at discharge (converted to ft of head)

Explanation: The equation sums all resistance components that the pump must overcome to move fluid through the system.

3. Importance of TDH Calculation

Details: Accurate TDH calculation is essential for proper pump selection, ensuring efficient operation and preventing issues like cavitation or insufficient flow.

4. Using the Calculator

Tips: Enter all values in feet. Static head is the vertical lift, friction loss can be calculated separately, and pressure head is optional (use 0 if not applicable).

5. Frequently Asked Questions (FAQ)

Q1: How do I calculate friction loss?
A: Friction loss depends on pipe size, length, material, flow rate, and fittings. Use Darcy-Weisbach or Hazen-Williams equations.

Q2: What's the difference between static head and TDH?
A: Static head is just the vertical component, while TDH includes all resistance (static, friction, and pressure).

Q3: How do I convert psi to feet of head?
A: Multiply psi by 2.31 (for water at standard conditions).

Q4: Why is TDH important for pump selection?
A: Pumps are selected based on their performance curves at specific TDH values to ensure proper flow rates.

Q5: What if my system has multiple discharge points?
A: Calculate TDH for each branch and use the highest value for pump selection.