1. What is Total Dynamic Head (TDH)?

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

2. How Does the Calculator Work?

The calculator uses the TDH equation:

Where:

• Static Head — Vertical distance from the liquid surface to the discharge point (feet)
• Friction Loss — Head loss due to friction in pipes and fittings (feet)
• Pressure Head — Additional head required for system pressure (feet)

Explanation: The equation sums all components of resistance 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 the pump can provide enough pressure to overcome system resistance and deliver the required flow rate.

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 only needed if the system requires specific pressure at the discharge point.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between static head and TDH?
A: Static head is just the vertical component, while TDH includes all resistances (static, friction, and pressure).

Q2: How do I determine friction loss?
A: Friction loss depends on pipe size, length, material, flow rate, and fittings. Use friction loss charts or calculators.

Q3: When is pressure head needed?
A: When the system requires specific pressure at the discharge point (e.g., sprinkler systems or pressurized tanks).

Q4: Can TDH be in other units?
A: Yes, but all components must be in the same units (feet, meters, etc.) for the calculation to work.

Q5: Why is TDH important for pump selection?
A: Pumps are rated for specific flow rates at specific heads. Choosing a pump with insufficient TDH capacity will result in poor performance.