1. What is Total Dynamic Head?

Total Dynamic Head (TDH) is the total equivalent height that a fluid is to be pumped, taking into account both the vertical lift and friction losses in the pipe system. It's a crucial parameter for selecting the right fountain pump.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• Vertical Height — The vertical distance from the water surface to the discharge point (in feet)
• Friction Loss — Pressure loss due to pipe resistance (in feet of head)

Explanation: The total head represents the total resistance the pump must overcome to move water through the system.

3. Importance of Head Calculation

Details: Proper head calculation ensures you select a pump with adequate power for your fountain. Underestimating head can lead to poor performance, while overestimating may result in excessive energy consumption.

4. Using the Calculator

Tips:

• Measure vertical height from water surface to highest discharge point
• Calculate friction loss based on pipe diameter, length, and flow rate
• Add safety margin of 10-20% to the calculated head

5. Frequently Asked Questions (FAQ)

Q1: What's a typical friction loss value?
A: For small residential fountains, friction loss is often 1-3 feet. For larger systems, calculate using pipe size and length.

Q2: How do I measure vertical height?
A: Measure from the water surface in the reservoir to the highest point where water exits the fountain.

Q3: What if my pump has to lift water vertically?
A: Vertical lift is part of the total head calculation - include it in the vertical height value.

Q4: Why is head measured in feet?
A: Pump performance curves typically use feet of head, making it the standard unit for these calculations.

Q5: How does head relate to pump selection?
A: Choose a pump whose performance curve shows adequate flow rate at your calculated total head.