1. What Is Pump Motor Power Calculation?

Pump motor power calculation determines the electrical power required to operate a pump based on flow rate, head, fluid density, and pump efficiency. This is essential for proper pump selection and energy consumption estimation.

2. How Does The Calculator Work?

The calculator uses the pump power formula:

Where:

• \( P \) — Motor power (kW)
• \( Q \) — Flow rate (m³/hr)
• \( H \) — Head (m)
• \( \rho \) — Fluid density (kg/m³)
• \( g \) — Gravitational acceleration (9.81 m/s²)
• Efficiency — Pump efficiency (%)

Explanation: The formula calculates the hydraulic power required to move the fluid and divides by the pump efficiency to determine the actual motor power needed.

3. Importance Of Pump Power Calculation

Details: Accurate power calculation ensures proper motor sizing, prevents overloading, optimizes energy consumption, and helps in selecting the right pump for specific applications.

4. Using The Calculator

Tips: Enter flow rate in m³/hr, head in meters, fluid density in kg/m³ (1000 for water), and pump efficiency as percentage. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is typical pump efficiency range?
A: Pump efficiency typically ranges from 50% to 85%, depending on pump type, size, and operating conditions.

Q2: Why is density important in power calculation?
A: Denser fluids require more power to pump because they have greater mass for the same volume.

Q3: How does head affect power consumption?
A: Higher head (pressure) requires significantly more power, as power is directly proportional to head.

Q4: What is the significance of the 3600 factor?
A: The 3600 converts flow rate from m³/hr to m³/s, since power calculations use SI units (seconds).

Q5: Should I add a safety factor to the calculated power?
A: Yes, typically add 10-20% safety margin to account for system losses and future requirements.