1. What is Pump Power Calculation?

The pump power calculation determines the mechanical power required to move fluid through a system. It accounts for fluid properties, flow rate, pressure head, and pump efficiency.

2. How Does the Calculator Work?

The calculator uses the fundamental pump power equation:

Where:

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

Explanation: The equation calculates the hydraulic power divided by pump efficiency to determine actual power requirement.

3. Importance of Pump Power Calculation

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

4. Using the Calculator

Tips: Enter all values in SI units. Default density is set for water (1000 kg/m³). Efficiency typically ranges 0.7-0.9 for centrifugal pumps.

5. Frequently Asked Questions (FAQ)

Q1: What's typical pump efficiency?
A: Centrifugal pumps: 70-90%, positive displacement pumps: 80-95%. Efficiency decreases with wear and improper sizing.

Q2: How to convert flow from L/s to m³/s?
A: Divide L/s by 1000 (1 L/s = 0.001 m³/s)

Q3: What affects pump power most?
A: Power is directly proportional to flow rate and head, making these the most significant factors.

Q4: Can I use this for other fluids?
A: Yes, just input the correct density (e.g., 800 kg/m³ for diesel, 13600 kg/m³ for mercury).

Q5: What about system losses?
A: This calculates ideal power. Actual system power should include safety factors for pipe friction and other losses.