1. What is Pump Power?

Pump power is the energy required by a pump to move a fluid at a specified flow rate against a specific head. It's a crucial parameter in pump selection and system design.

2. How Does the Calculator Work?

The calculator uses the pump power equation:

Where:

• \( P \) — Pump power (W)
• \( \rho \) — Fluid density (kg/m³)
• \( g \) — Acceleration due to gravity (9.81 m/s²)
• \( Q \) — Flow rate (m³/s)
• \( H \) — Total head (m)
• \( \eta \) — 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 motor overload, and helps in energy efficiency assessments.

4. Using the Calculator

Tips: Enter fluid density (1000 kg/m³ for water), flow rate in m³/s, total head in meters, and pump efficiency (typically 0.7-0.9 for centrifugal pumps).

5. Frequently Asked Questions (FAQ)

Q1: What's typical pump efficiency?
A: Centrifugal pumps typically range 70-90%, while positive displacement pumps can reach 90-95%.

Q2: How to convert flow rate from L/s to m³/s?
A: Divide L/s by 1000 (1 m³/s = 1000 L/s).

Q3: What affects pump efficiency?
A: Pump type, size, operating point relative to BEP (best efficiency point), and fluid viscosity.

Q4: Why is density important?
A: Power requirement increases directly with fluid density (water = 1000 kg/m³, oil ≈ 800-900 kg/m³).

Q5: What if I have multiple pumps?
A: For series operation (same flow, added heads), calculate total head. For parallel (same head, added flows), calculate total flow.