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 friction losses in the pipe. It represents the total energy required to move fluid through a pumping system.

2. How Does the Calculator Work?

The calculator uses the TDH formula:

Where:

• \( Lift \) — Vertical distance the fluid must be lifted (ft)
• \( Losses \) — Friction and other losses in the system (ft)

Explanation: TDH is the sum of the static lift (vertical height difference) and all friction losses in the piping system.

3. Importance of TDH Calculation

Details: Accurate TDH calculation is essential for proper pump selection and ensuring the pump can overcome both static lift and system friction losses to deliver the required flow rate.

4. Using the Calculator

Tips: Enter the lift (vertical height) in feet and the system losses in feet. Both values must be non-negative numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between static head and dynamic head?
A: Static head is the vertical height difference only, while dynamic head includes both static head and friction losses.

Q2: How do I calculate friction losses?
A: Friction losses depend on pipe material, diameter, length, fittings, and flow rate, typically calculated using established formulas or tables.

Q3: Why is TDH important for pump selection?
A: Pumps are rated for specific TDH values at various flow rates. Selecting a pump with insufficient TDH capacity will result in inadequate performance.

Q4: Does TDH change with flow rate?
A: Yes, friction losses increase with flow rate, so TDH increases as flow rate increases in a given system.

Q5: Can TDH be negative?
A: No, TDH represents energy required to move fluid and is always a positive value.