1. What is the Pump Power Equation?

The pump power equation calculates the theoretical power required to move fluid through a system, accounting for flow rate, head pressure, fluid density, and pump efficiency.

2. How Does the Calculator Work?

The calculator uses the pump power equation:

Where:

• \( P \) — Power (Watts)
• \( \rho \) — Fluid density (kg/m³, 1000 for water)
• \( g \) — Gravitational acceleration (9.81 m/s²)
• \( Q \) — Flow rate (m³/s)
• \( H \) — Total head (meters)
• \( \eta \) — Pump efficiency (0-1)

Explanation: The equation calculates the energy needed to move a volume of fluid against gravity and system resistance.

3. Importance of Pump Power Calculation

Details: Proper pump sizing is essential for energy efficiency, system performance, and avoiding equipment overload or premature failure.

4. Using the Calculator

Tips: Enter flow rate in m³/s, head in meters, efficiency as decimal (0.85 = 85%), and density in kg/m³ (1000 for water). All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What is typical pump efficiency?
A: Pool pumps typically range from 50-85% efficiency. Higher quality pumps achieve better efficiency.

Q2: How do I convert flow rate from GPM to m³/s?
A: Multiply GPM by 0.00006309 to get m³/s (1 GPM = 0.00006309 m³/s).

Q3: What affects total head in a pool system?
A: Pipe length, fittings, filter condition, elevation changes, and equipment all contribute to total head.

Q4: Why is density important?
A: Heavier fluids require more power to pump. Saltwater pools have slightly higher density than freshwater.

Q5: How does this relate to electrical power consumption?
A: The result is hydraulic power. Actual electrical power will be higher due to motor inefficiencies.