1. What is a Pump Flow Rate Calculator?

Definition: This calculator estimates the volumetric flow rate of a pump based on power input, fluid properties, and pump efficiency.

Purpose: It helps engineers and technicians determine the expected flow rate of a pump system for design and troubleshooting purposes.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Flow rate (m³/s)
• \( P \) — Power input (W)
• \( \rho \) — Fluid density (kg/m³)
• \( g \) — Gravitational acceleration (9.81 m/s²)
• \( h \) — Total dynamic head (m)
• \( \eta \) — Pump efficiency (dimensionless, 0-1)

Explanation: The formula calculates how much fluid volume the pump can move per second given the input power and system characteristics.

3. Importance of Pump Flow Rate Calculation

Details: Accurate flow rate estimation ensures proper system design, energy efficiency, and meets process requirements in applications like water supply, HVAC, and industrial processes.

4. Using the Calculator

Tips: Enter the pump power in watts, fluid density (default 1000 kg/m³ for water), total head in meters, and pump efficiency (default 0.8). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is total dynamic head?
A: It's the total equivalent height that the fluid needs to be pumped, accounting for static lift, friction losses, and pressure differences.

Q2: What's a typical pump efficiency?
A: Centrifugal pumps typically range from 40-85% efficiency, with 70-80% being common for well-designed pumps.

Q3: How do I find the power input?
A: Check pump specifications or measure electrical input power (for electric pumps) minus any motor losses.

Q4: Does this work for all fluid types?
A: Yes, but you must use the correct density value for your specific fluid (e.g., 1000 kg/m³ for water, 800 kg/m³ for gasoline).

Q5: Can I calculate power from flow rate?
A: Yes, rearrange the formula: \( P = Q \times \rho \times g \times h \times \eta \). We may add this feature in future updates.