1. What is Pump Power?

Pump power is the energy required to move a fluid through a system. It depends on the fluid's density, flow rate, the head (height) it needs to be pumped, and the pump's efficiency.

2. How Does the Calculator Work?

The calculator uses the pump power equation:

Where:

• \( P \) — Power (Watts)
• \( \rho \) — Fluid density (kg/m³)
• \( g \) — Gravity (9.81 m/s²)
• \( Q \) — Flow rate (m³/s)
• \( H \) — Head (meters)
• \( \eta \) — Pump efficiency (0-1)

Explanation: The equation calculates the theoretical power required to move the fluid, then divides by pump efficiency to get actual power requirement.

3. Importance of Pump Power Calculation

Details: Accurate pump power calculation ensures proper pump selection, prevents under/over-sizing, and helps estimate energy costs in fluid systems.

4. Using the Calculator

Tips:

• For water at 20°C, density is approximately 1000 kg/m³
• Typical pump efficiencies range from 0.5 to 0.9
• Convert flow rates from L/s to m³/s by dividing by 1000

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between kW and horsepower?
A: 1 kW ≈ 1.34 hp. To convert kW to hp, multiply by 1.34.

Q2: How does viscosity affect pump power?
A: Higher viscosity fluids require more power due to increased friction losses.

Q3: What is typical pump efficiency?
A: Centrifugal pumps typically range from 40-85% efficiency depending on size and design.

Q4: How do I account for system losses?
A: Add 10-20% safety factor to the calculated power for pipe friction and other losses.

Q5: Can I use this for gases?
A: This equation is primarily for liquids. Gas calculations require additional factors.