1. What is the Pump Power Formula?

The pump power formula calculates the theoretical power required to move a fluid through a system, accounting for fluid properties and system characteristics. 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 required (W)
• \( \rho \) — Fluid density (kg/m³)
• \( g \) — Gravitational acceleration (9.81 m/s²)
• \( Q \) — Volumetric flow rate (m³/s)
• \( H \) — Total dynamic head (m)
• \( \eta \) — Pump efficiency (0-1)

Explanation: The formula accounts for the energy needed to move a specific volume of fluid against gravity and system resistance, adjusted 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 (water = 1000 kg/m³), flow rate in cubic meters per second, total head in meters, and pump efficiency as a decimal (e.g., 80% = 0.8). All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What is total dynamic head (H)?
A: It's the total height the pump must move the fluid, including static head, friction losses, and pressure differences.

Q2: How do I estimate pump efficiency?
A: Typical centrifugal pump efficiency ranges from 0.5 to 0.9 (50-90%). Check manufacturer specifications for exact values.

Q3: Why is density important?
A: Denser fluids require more power to move. The calculator defaults to water density (1000 kg/m³).

Q4: What about viscous fluids?
A: For highly viscous fluids, additional corrections may be needed as viscosity affects both head and efficiency.

Q5: How does this relate to actual motor power?
A: Motor power should be higher than calculated to account for inefficiencies and safety factors (typically 10-20% more).