1. What is Pump Power Calculation?

The pump power calculation determines the mechanical power required to move a fluid at a specified flow rate against a given head (pressure) at a certain efficiency. It's essential for proper pump selection and system design.

2. How Does the Calculator Work?

The calculator uses the pump power equation:

Where:

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

Explanation: The equation calculates the power needed to move a fluid with specific properties at a given rate against a certain pressure, accounting for pump efficiency.

3. Importance of Pump Power Calculation

Details: Accurate power calculation ensures proper pump selection, prevents under/over-sizing, optimizes energy consumption, and helps design efficient fluid systems.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's typical pump efficiency?
A: Centrifugal pumps typically range from 70-90% efficiency, 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), fluid viscosity, and system design.

Q4: How does viscosity affect power requirements?
A: Higher viscosity fluids require more power due to increased friction losses.

Q5: Should I add a safety factor?
A: Yes, typically 10-20% additional power capacity is recommended for operational variations.